diff --git a/accessapproval/apiv1/access_approval_client.go b/accessapproval/apiv1/access_approval_client.go
index cc80b11..67207f3 100644
--- a/accessapproval/apiv1/access_approval_client.go
+++ b/accessapproval/apiv1/access_approval_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	accessapprovalpb "google.golang.org/genproto/googleapis/cloud/accessapproval/v1"
 	"google.golang.org/grpc"
@@ -49,7 +50,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("accessapproval.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("accessapproval.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("accessapproval.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/accessapproval/apiv1/doc.go b/accessapproval/apiv1/doc.go
index 0d57a2b..90c01cf 100644
--- a/accessapproval/apiv1/doc.go
+++ b/accessapproval/apiv1/doc.go
@@ -46,7 +46,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/analytics/admin/apiv1alpha/analytics_admin_client.go b/analytics/admin/apiv1alpha/analytics_admin_client.go
index 7c7294a..54e9b8d 100644
--- a/analytics/admin/apiv1alpha/analytics_admin_client.go
+++ b/analytics/admin/apiv1alpha/analytics_admin_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	adminpb "google.golang.org/genproto/googleapis/analytics/admin/v1alpha"
 	"google.golang.org/grpc"
@@ -90,7 +91,8 @@
 
 func defaultAnalyticsAdminClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("analyticsadmin.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("analyticsadmin.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("analyticsadmin.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/analytics/admin/apiv1alpha/doc.go b/analytics/admin/apiv1alpha/doc.go
index d6c41b5..5fb6190 100644
--- a/analytics/admin/apiv1alpha/doc.go
+++ b/analytics/admin/apiv1alpha/doc.go
@@ -46,7 +46,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/analytics/data/apiv1alpha/alpha_analytics_data_client.go b/analytics/data/apiv1alpha/alpha_analytics_data_client.go
index bc956b9..cc26f1e 100644
--- a/analytics/data/apiv1alpha/alpha_analytics_data_client.go
+++ b/analytics/data/apiv1alpha/alpha_analytics_data_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	datapb "google.golang.org/genproto/googleapis/analytics/data/v1alpha"
 	"google.golang.org/grpc"
@@ -46,7 +47,8 @@
 
 func defaultAlphaAnalyticsDataClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("analyticsdata.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("analyticsdata.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("analyticsdata.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/analytics/data/apiv1alpha/doc.go b/analytics/data/apiv1alpha/doc.go
index aa2d0bc..dd73da6 100644
--- a/analytics/data/apiv1alpha/doc.go
+++ b/analytics/data/apiv1alpha/doc.go
@@ -46,7 +46,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/area120/tables/apiv1alpha1/doc.go b/area120/tables/apiv1alpha1/doc.go
index cf581ea..9ba27c4 100644
--- a/area120/tables/apiv1alpha1/doc.go
+++ b/area120/tables/apiv1alpha1/doc.go
@@ -46,7 +46,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/area120/tables/apiv1alpha1/tables_client.go b/area120/tables/apiv1alpha1/tables_client.go
index ddb2bb0..c86d477 100644
--- a/area120/tables/apiv1alpha1/tables_client.go
+++ b/area120/tables/apiv1alpha1/tables_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	tablespb "google.golang.org/genproto/googleapis/area120/tables/v1alpha1"
 	"google.golang.org/grpc"
@@ -50,7 +51,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("area120tables.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("area120tables.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("area120tables.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/asset/apiv1/asset_client.go b/asset/apiv1/asset_client.go
index 2da401f..1e5dc93 100644
--- a/asset/apiv1/asset_client.go
+++ b/asset/apiv1/asset_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	assetpb "google.golang.org/genproto/googleapis/cloud/asset/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -54,7 +55,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("cloudasset.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("cloudasset.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("cloudasset.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/asset/apiv1/doc.go b/asset/apiv1/doc.go
index cc87b9c..418f5d6 100644
--- a/asset/apiv1/doc.go
+++ b/asset/apiv1/doc.go
@@ -48,7 +48,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/asset/apiv1beta1/asset_client.go b/asset/apiv1beta1/asset_client.go
index 62be4c8..959d103 100644
--- a/asset/apiv1beta1/asset_client.go
+++ b/asset/apiv1beta1/asset_client.go
@@ -27,6 +27,7 @@
 	lroauto "cloud.google.com/go/longrunning/autogen"
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	assetpb "google.golang.org/genproto/googleapis/cloud/asset/v1beta1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -45,7 +46,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("cloudasset.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("cloudasset.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("cloudasset.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/asset/apiv1beta1/doc.go b/asset/apiv1beta1/doc.go
index b8ef78e..ea359cb 100644
--- a/asset/apiv1beta1/doc.go
+++ b/asset/apiv1beta1/doc.go
@@ -50,7 +50,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/asset/apiv1p2beta1/asset_client.go b/asset/apiv1p2beta1/asset_client.go
index 1d080ba..d388e9b 100644
--- a/asset/apiv1p2beta1/asset_client.go
+++ b/asset/apiv1p2beta1/asset_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	assetpb "google.golang.org/genproto/googleapis/cloud/asset/v1p2beta1"
 	"google.golang.org/grpc"
@@ -45,7 +46,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("cloudasset.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("cloudasset.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("cloudasset.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/asset/apiv1p2beta1/doc.go b/asset/apiv1p2beta1/doc.go
index 595d4b4..43b3574 100644
--- a/asset/apiv1p2beta1/doc.go
+++ b/asset/apiv1p2beta1/doc.go
@@ -50,7 +50,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/asset/apiv1p5beta1/asset_client.go b/asset/apiv1p5beta1/asset_client.go
index 4ab5133..71243ef 100644
--- a/asset/apiv1p5beta1/asset_client.go
+++ b/asset/apiv1p5beta1/asset_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	assetpb "google.golang.org/genproto/googleapis/cloud/asset/v1p5beta1"
 	"google.golang.org/grpc"
@@ -43,7 +44,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("cloudasset.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("cloudasset.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("cloudasset.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/asset/apiv1p5beta1/doc.go b/asset/apiv1p5beta1/doc.go
index f0a93d1..910b349 100644
--- a/asset/apiv1p5beta1/doc.go
+++ b/asset/apiv1p5beta1/doc.go
@@ -50,7 +50,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/assuredworkloads/apiv1beta1/assured_workloads_client.go b/assuredworkloads/apiv1beta1/assured_workloads_client.go
index eb4b6e1..743cbf6 100644
--- a/assuredworkloads/apiv1beta1/assured_workloads_client.go
+++ b/assuredworkloads/apiv1beta1/assured_workloads_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	assuredworkloadspb "google.golang.org/genproto/googleapis/cloud/assuredworkloads/v1beta1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -50,7 +51,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("assuredworkloads.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("assuredworkloads.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("assuredworkloads.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/assuredworkloads/apiv1beta1/doc.go b/assuredworkloads/apiv1beta1/doc.go
index 3a253cb..2b66352 100644
--- a/assuredworkloads/apiv1beta1/doc.go
+++ b/assuredworkloads/apiv1beta1/doc.go
@@ -46,7 +46,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/automl/apiv1/auto_ml_client.go b/automl/apiv1/auto_ml_client.go
index 3f703bb..60ccbf3 100644
--- a/automl/apiv1/auto_ml_client.go
+++ b/automl/apiv1/auto_ml_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	automlpb "google.golang.org/genproto/googleapis/cloud/automl/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -63,7 +64,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("automl.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("automl.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("automl.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/automl/apiv1/doc.go b/automl/apiv1/doc.go
index 2a128c5..2208a09 100644
--- a/automl/apiv1/doc.go
+++ b/automl/apiv1/doc.go
@@ -49,7 +49,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/automl/apiv1/prediction_client.go b/automl/apiv1/prediction_client.go
index 7236e46..348888d 100644
--- a/automl/apiv1/prediction_client.go
+++ b/automl/apiv1/prediction_client.go
@@ -27,6 +27,7 @@
 	lroauto "cloud.google.com/go/longrunning/autogen"
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	automlpb "google.golang.org/genproto/googleapis/cloud/automl/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -44,7 +45,8 @@
 
 func defaultPredictionClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("automl.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("automl.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("automl.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/automl/apiv1beta1/auto_ml_client.go b/automl/apiv1beta1/auto_ml_client.go
index ceafec2..fa473c4 100644
--- a/automl/apiv1beta1/auto_ml_client.go
+++ b/automl/apiv1beta1/auto_ml_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	automlpb "google.golang.org/genproto/googleapis/cloud/automl/v1beta1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -69,7 +70,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("automl.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("automl.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("automl.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/automl/apiv1beta1/doc.go b/automl/apiv1beta1/doc.go
index ae518a7..8c2c193 100644
--- a/automl/apiv1beta1/doc.go
+++ b/automl/apiv1beta1/doc.go
@@ -51,7 +51,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/automl/apiv1beta1/prediction_client.go b/automl/apiv1beta1/prediction_client.go
index 2ba9476..b4ae466 100644
--- a/automl/apiv1beta1/prediction_client.go
+++ b/automl/apiv1beta1/prediction_client.go
@@ -27,6 +27,7 @@
 	lroauto "cloud.google.com/go/longrunning/autogen"
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	automlpb "google.golang.org/genproto/googleapis/cloud/automl/v1beta1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -44,7 +45,8 @@
 
 func defaultPredictionClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("automl.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("automl.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("automl.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/bigquery/connection/apiv1/connection_client.go b/bigquery/connection/apiv1/connection_client.go
index 185975b..725a6df 100644
--- a/bigquery/connection/apiv1/connection_client.go
+++ b/bigquery/connection/apiv1/connection_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	connectionpb "google.golang.org/genproto/googleapis/cloud/bigquery/connection/v1"
 	iampb "google.golang.org/genproto/googleapis/iam/v1"
@@ -51,7 +52,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("bigqueryconnection.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("bigqueryconnection.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("bigqueryconnection.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/bigquery/connection/apiv1/doc.go b/bigquery/connection/apiv1/doc.go
index dea1e00..f42efd0 100644
--- a/bigquery/connection/apiv1/doc.go
+++ b/bigquery/connection/apiv1/doc.go
@@ -48,7 +48,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/bigquery/connection/apiv1beta1/connection_client.go b/bigquery/connection/apiv1beta1/connection_client.go
index af85d6a..d5b254c 100644
--- a/bigquery/connection/apiv1beta1/connection_client.go
+++ b/bigquery/connection/apiv1beta1/connection_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	connectionpb "google.golang.org/genproto/googleapis/cloud/bigquery/connection/v1beta1"
 	iampb "google.golang.org/genproto/googleapis/iam/v1"
@@ -50,7 +51,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("bigqueryconnection.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("bigqueryconnection.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("bigqueryconnection.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/bigquery/connection/apiv1beta1/doc.go b/bigquery/connection/apiv1beta1/doc.go
index 71dfd2d..444775c 100644
--- a/bigquery/connection/apiv1beta1/doc.go
+++ b/bigquery/connection/apiv1beta1/doc.go
@@ -50,7 +50,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/bigquery/datatransfer/apiv1/data_transfer_client.go b/bigquery/datatransfer/apiv1/data_transfer_client.go
index 9342357..a39936a 100644
--- a/bigquery/datatransfer/apiv1/data_transfer_client.go
+++ b/bigquery/datatransfer/apiv1/data_transfer_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	datatransferpb "google.golang.org/genproto/googleapis/cloud/bigquery/datatransfer/v1"
 	"google.golang.org/grpc"
@@ -56,7 +57,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("bigquerydatatransfer.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("bigquerydatatransfer.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("bigquerydatatransfer.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/bigquery/datatransfer/apiv1/doc.go b/bigquery/datatransfer/apiv1/doc.go
index 147d304..9a0a39d 100644
--- a/bigquery/datatransfer/apiv1/doc.go
+++ b/bigquery/datatransfer/apiv1/doc.go
@@ -49,7 +49,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/bigquery/go.mod b/bigquery/go.mod
index c9cc585..17c34f8 100644
--- a/bigquery/go.mod
+++ b/bigquery/go.mod
@@ -8,8 +8,8 @@
 	github.com/golang/protobuf v1.4.3
 	github.com/google/go-cmp v0.5.2
 	github.com/googleapis/gax-go/v2 v2.0.5
-	golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6 // indirect
-	google.golang.org/api v0.33.0
-	google.golang.org/genproto v0.0.0-20201021134325-0d71844de594
+	golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 // indirect
+	google.golang.org/api v0.34.0
+	google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5
 	google.golang.org/grpc v1.32.0
 )
diff --git a/bigquery/go.sum b/bigquery/go.sum
index b7cb4cb..0138625 100644
--- a/bigquery/go.sum
+++ b/bigquery/go.sum
@@ -263,6 +263,8 @@
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20201010224723-4f7140c49acb h1:mUVeFHoDKis5nxCAzoAi7E8Ghb86EXh/RK6wtvJIqRY=
 golang.org/x/net v0.0.0-20201010224723-4f7140c49acb/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974 h1:IX6qOQeG5uLjB/hjjwjedwfjND0hgjPMMyO1RoIXQNI=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45 h1:SVwTIAaPC2U/AvvLNZ2a7OVsmBpC8L5BlwK1whH3hm0=
@@ -284,6 +286,7 @@
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a h1:WXEvlFVvvGxCJLG6REjsT03iWnKLEWinaScsxF2Vm2o=
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -392,8 +395,8 @@
 golang.org/x/tools v0.0.0-20200904185747-39188db58858/go.mod h1:Cj7w3i3Rnn0Xh82ur9kSqwfTHTeVxaDqrfMjpcNT6bE=
 golang.org/x/tools v0.0.0-20201017001424-6003fad69a88 h1:ZB1XYzdDo7c/O48jzjMkvIjnC120Z9/CwgDWhePjQdQ=
 golang.org/x/tools v0.0.0-20201017001424-6003fad69a88/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6 h1:ov/kH02/RUWYnR/kPSTGM8hFzZglJT6cBNDXVDoxmJY=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 h1:rbvTkL9AkFts1cgI78+gG6Yu1pwaqX6hjSJAatB78E4=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
@@ -428,6 +431,8 @@
 google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc=
 google.golang.org/api v0.33.0 h1:+gL0XvACeMIvpwLZ5rQZzLn5cwOsgg8dIcfJ2SYfBVw=
 google.golang.org/api v0.33.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
+google.golang.org/api v0.34.0 h1:k40adF3uR+6x/+hO5Dh4ZFUqFp67vxvbpafFiJxl10A=
+google.golang.org/api v0.34.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
@@ -483,8 +488,8 @@
 google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154 h1:bFFRpT+e8JJVY7lMMfvezL1ZIwqiwmPl2bsE2yx4HqM=
 google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594 h1:JZWUHUjZJojCHxs9ZZLFsnRGKVBXBoOHGxeTSt6OE+Q=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5 h1:YejJbGvoWsTXHab4OKNrzk27Dr7s4lPLnewbHue1+gM=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.21.1 h1:j6XxA85m/6txkUCHvzlV5f+HBNl/1r5cZ2A/3IEFOO8=
diff --git a/bigquery/reservation/apiv1/doc.go b/bigquery/reservation/apiv1/doc.go
index d1a9452..4f0c5be 100644
--- a/bigquery/reservation/apiv1/doc.go
+++ b/bigquery/reservation/apiv1/doc.go
@@ -48,7 +48,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/bigquery/reservation/apiv1/reservation_client.go b/bigquery/reservation/apiv1/reservation_client.go
index 5f4caca..15a92b4 100644
--- a/bigquery/reservation/apiv1/reservation_client.go
+++ b/bigquery/reservation/apiv1/reservation_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	reservationpb "google.golang.org/genproto/googleapis/cloud/bigquery/reservation/v1"
 	"google.golang.org/grpc"
@@ -61,7 +62,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("bigqueryreservation.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("bigqueryreservation.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("bigqueryreservation.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/bigquery/reservation/apiv1beta1/doc.go b/bigquery/reservation/apiv1beta1/doc.go
index 033c002..7e9f8e4 100644
--- a/bigquery/reservation/apiv1beta1/doc.go
+++ b/bigquery/reservation/apiv1beta1/doc.go
@@ -50,7 +50,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/bigquery/reservation/apiv1beta1/reservation_client.go b/bigquery/reservation/apiv1beta1/reservation_client.go
index 841dca1..b3365f5 100644
--- a/bigquery/reservation/apiv1beta1/reservation_client.go
+++ b/bigquery/reservation/apiv1beta1/reservation_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	reservationpb "google.golang.org/genproto/googleapis/cloud/bigquery/reservation/v1beta1"
 	"google.golang.org/grpc"
@@ -61,7 +62,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("bigqueryreservation.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("bigqueryreservation.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("bigqueryreservation.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/bigquery/storage/apiv1/big_query_read_client.go b/bigquery/storage/apiv1/big_query_read_client.go
index 5261bc8..884e710 100644
--- a/bigquery/storage/apiv1/big_query_read_client.go
+++ b/bigquery/storage/apiv1/big_query_read_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	storagepb "google.golang.org/genproto/googleapis/cloud/bigquery/storage/v1"
 	"google.golang.org/grpc"
@@ -43,7 +44,8 @@
 
 func defaultBigQueryReadClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("bigquerystorage.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("bigquerystorage.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("bigquerystorage.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/bigquery/storage/apiv1/doc.go b/bigquery/storage/apiv1/doc.go
index 0c83325..646803f 100644
--- a/bigquery/storage/apiv1/doc.go
+++ b/bigquery/storage/apiv1/doc.go
@@ -46,7 +46,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/bigquery/storage/apiv1alpha2/big_query_write_client.go b/bigquery/storage/apiv1alpha2/big_query_write_client.go
index beb7fb8..a728a01 100644
--- a/bigquery/storage/apiv1alpha2/big_query_write_client.go
+++ b/bigquery/storage/apiv1alpha2/big_query_write_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	storagepb "google.golang.org/genproto/googleapis/cloud/bigquery/storage/v1alpha2"
 	"google.golang.org/grpc"
@@ -46,7 +47,8 @@
 
 func defaultBigQueryWriteClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("bigquerystorage.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("bigquerystorage.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("bigquerystorage.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/bigquery/storage/apiv1alpha2/doc.go b/bigquery/storage/apiv1alpha2/doc.go
index 5ca0f14..e3c2c30 100644
--- a/bigquery/storage/apiv1alpha2/doc.go
+++ b/bigquery/storage/apiv1alpha2/doc.go
@@ -48,7 +48,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/bigquery/storage/apiv1beta1/big_query_storage_client.go b/bigquery/storage/apiv1beta1/big_query_storage_client.go
index 45c504e..1e613eb 100644
--- a/bigquery/storage/apiv1beta1/big_query_storage_client.go
+++ b/bigquery/storage/apiv1beta1/big_query_storage_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	storagepb "google.golang.org/genproto/googleapis/cloud/bigquery/storage/v1beta1"
 	"google.golang.org/grpc"
@@ -45,7 +46,8 @@
 
 func defaultBigQueryStorageClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("bigquerystorage.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("bigquerystorage.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("bigquerystorage.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/bigquery/storage/apiv1beta1/doc.go b/bigquery/storage/apiv1beta1/doc.go
index ad7ba40..044ed32 100644
--- a/bigquery/storage/apiv1beta1/doc.go
+++ b/bigquery/storage/apiv1beta1/doc.go
@@ -48,7 +48,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/bigquery/storage/apiv1beta2/big_query_read_client.go b/bigquery/storage/apiv1beta2/big_query_read_client.go
index c1e55b0..d892779 100644
--- a/bigquery/storage/apiv1beta2/big_query_read_client.go
+++ b/bigquery/storage/apiv1beta2/big_query_read_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	storagepb "google.golang.org/genproto/googleapis/cloud/bigquery/storage/v1beta2"
 	"google.golang.org/grpc"
@@ -43,7 +44,8 @@
 
 func defaultBigQueryReadClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("bigquerystorage.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("bigquerystorage.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("bigquerystorage.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/bigquery/storage/apiv1beta2/doc.go b/bigquery/storage/apiv1beta2/doc.go
index fb41df4..f1c86b3 100644
--- a/bigquery/storage/apiv1beta2/doc.go
+++ b/bigquery/storage/apiv1beta2/doc.go
@@ -48,7 +48,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/bigtable/go.mod b/bigtable/go.mod
index 399ccf2..02433ad 100644
--- a/bigtable/go.mod
+++ b/bigtable/go.mod
@@ -9,9 +9,9 @@
 	github.com/google/go-cmp v0.5.2
 	github.com/googleapis/gax-go/v2 v2.0.5
 	golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43
-	golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6 // indirect
-	google.golang.org/api v0.33.0
-	google.golang.org/genproto v0.0.0-20201021134325-0d71844de594
+	golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 // indirect
+	google.golang.org/api v0.34.0
+	google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5
 	google.golang.org/grpc v1.32.0
 	rsc.io/binaryregexp v0.2.0
 )
diff --git a/bigtable/go.sum b/bigtable/go.sum
index 24663b2..e21f491 100644
--- a/bigtable/go.sum
+++ b/bigtable/go.sum
@@ -270,6 +270,8 @@
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20201010224723-4f7140c49acb h1:mUVeFHoDKis5nxCAzoAi7E8Ghb86EXh/RK6wtvJIqRY=
 golang.org/x/net v0.0.0-20201010224723-4f7140c49acb/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974 h1:IX6qOQeG5uLjB/hjjwjedwfjND0hgjPMMyO1RoIXQNI=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45 h1:SVwTIAaPC2U/AvvLNZ2a7OVsmBpC8L5BlwK1whH3hm0=
@@ -291,6 +293,7 @@
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a h1:WXEvlFVvvGxCJLG6REjsT03iWnKLEWinaScsxF2Vm2o=
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -401,8 +404,8 @@
 golang.org/x/tools v0.0.0-20200904185747-39188db58858/go.mod h1:Cj7w3i3Rnn0Xh82ur9kSqwfTHTeVxaDqrfMjpcNT6bE=
 golang.org/x/tools v0.0.0-20201017001424-6003fad69a88 h1:ZB1XYzdDo7c/O48jzjMkvIjnC120Z9/CwgDWhePjQdQ=
 golang.org/x/tools v0.0.0-20201017001424-6003fad69a88/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6 h1:ov/kH02/RUWYnR/kPSTGM8hFzZglJT6cBNDXVDoxmJY=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 h1:rbvTkL9AkFts1cgI78+gG6Yu1pwaqX6hjSJAatB78E4=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
@@ -440,6 +443,8 @@
 google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc=
 google.golang.org/api v0.33.0 h1:+gL0XvACeMIvpwLZ5rQZzLn5cwOsgg8dIcfJ2SYfBVw=
 google.golang.org/api v0.33.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
+google.golang.org/api v0.34.0 h1:k40adF3uR+6x/+hO5Dh4ZFUqFp67vxvbpafFiJxl10A=
+google.golang.org/api v0.34.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
@@ -496,8 +501,8 @@
 google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154 h1:bFFRpT+e8JJVY7lMMfvezL1ZIwqiwmPl2bsE2yx4HqM=
 google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594 h1:JZWUHUjZJojCHxs9ZZLFsnRGKVBXBoOHGxeTSt6OE+Q=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5 h1:YejJbGvoWsTXHab4OKNrzk27Dr7s4lPLnewbHue1+gM=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.21.1 h1:j6XxA85m/6txkUCHvzlV5f+HBNl/1r5cZ2A/3IEFOO8=
diff --git a/billing/apiv1/cloud_billing_client.go b/billing/apiv1/cloud_billing_client.go
index 704d054..88639d1 100644
--- a/billing/apiv1/cloud_billing_client.go
+++ b/billing/apiv1/cloud_billing_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	billingpb "google.golang.org/genproto/googleapis/cloud/billing/v1"
 	iampb "google.golang.org/genproto/googleapis/iam/v1"
@@ -53,7 +54,8 @@
 
 func defaultCloudBillingClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("cloudbilling.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("cloudbilling.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("cloudbilling.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/billing/apiv1/cloud_catalog_client.go b/billing/apiv1/cloud_catalog_client.go
index 6ae7920..4afb9c5 100644
--- a/billing/apiv1/cloud_catalog_client.go
+++ b/billing/apiv1/cloud_catalog_client.go
@@ -26,6 +26,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	billingpb "google.golang.org/genproto/googleapis/cloud/billing/v1"
 	"google.golang.org/grpc"
@@ -42,7 +43,8 @@
 
 func defaultCloudCatalogClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("cloudbilling.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("cloudbilling.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("cloudbilling.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/billing/apiv1/doc.go b/billing/apiv1/doc.go
index 81715f9..3b31038 100644
--- a/billing/apiv1/doc.go
+++ b/billing/apiv1/doc.go
@@ -49,7 +49,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/billing/budgets/apiv1beta1/budget_client.go b/billing/budgets/apiv1beta1/budget_client.go
index 943fc5f..ad485a4 100644
--- a/billing/budgets/apiv1beta1/budget_client.go
+++ b/billing/budgets/apiv1beta1/budget_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	budgetspb "google.golang.org/genproto/googleapis/cloud/billing/budgets/v1beta1"
 	"google.golang.org/grpc"
@@ -47,7 +48,8 @@
 
 func defaultBudgetClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("billingbudgets.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("billingbudgets.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("billingbudgets.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/billing/budgets/apiv1beta1/doc.go b/billing/budgets/apiv1beta1/doc.go
index d0c81fe..4a36562 100644
--- a/billing/budgets/apiv1beta1/doc.go
+++ b/billing/budgets/apiv1beta1/doc.go
@@ -46,7 +46,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/cloudbuild/apiv1/v2/cloud_build_client.go b/cloudbuild/apiv1/v2/cloud_build_client.go
index b5abe43..e68fc79 100644
--- a/cloudbuild/apiv1/v2/cloud_build_client.go
+++ b/cloudbuild/apiv1/v2/cloud_build_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	cloudbuildpb "google.golang.org/genproto/googleapis/devtools/cloudbuild/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -61,7 +62,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("cloudbuild.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("cloudbuild.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("cloudbuild.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/cloudbuild/apiv1/v2/doc.go b/cloudbuild/apiv1/v2/doc.go
index d7beb3d..4e3ef68 100644
--- a/cloudbuild/apiv1/v2/doc.go
+++ b/cloudbuild/apiv1/v2/doc.go
@@ -48,7 +48,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/cloudtasks/apiv2/cloud_tasks_client.go b/cloudtasks/apiv2/cloud_tasks_client.go
index 1e2c5bc..ed5921c 100644
--- a/cloudtasks/apiv2/cloud_tasks_client.go
+++ b/cloudtasks/apiv2/cloud_tasks_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	taskspb "google.golang.org/genproto/googleapis/cloud/tasks/v2"
 	iampb "google.golang.org/genproto/googleapis/iam/v1"
@@ -59,7 +60,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("cloudtasks.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("cloudtasks.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("cloudtasks.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/cloudtasks/apiv2/doc.go b/cloudtasks/apiv2/doc.go
index 3765a69..8f93030 100644
--- a/cloudtasks/apiv2/doc.go
+++ b/cloudtasks/apiv2/doc.go
@@ -48,7 +48,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/cloudtasks/apiv2beta2/cloud_tasks_client.go b/cloudtasks/apiv2beta2/cloud_tasks_client.go
index f20f1bb..d8f4685 100644
--- a/cloudtasks/apiv2beta2/cloud_tasks_client.go
+++ b/cloudtasks/apiv2beta2/cloud_tasks_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	taskspb "google.golang.org/genproto/googleapis/cloud/tasks/v2beta2"
 	iampb "google.golang.org/genproto/googleapis/iam/v1"
@@ -63,7 +64,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("cloudtasks.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("cloudtasks.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("cloudtasks.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/cloudtasks/apiv2beta2/doc.go b/cloudtasks/apiv2beta2/doc.go
index 292749b..7a391a5 100644
--- a/cloudtasks/apiv2beta2/doc.go
+++ b/cloudtasks/apiv2beta2/doc.go
@@ -50,7 +50,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/cloudtasks/apiv2beta3/cloud_tasks_client.go b/cloudtasks/apiv2beta3/cloud_tasks_client.go
index 9aa4a19..9248149 100644
--- a/cloudtasks/apiv2beta3/cloud_tasks_client.go
+++ b/cloudtasks/apiv2beta3/cloud_tasks_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	taskspb "google.golang.org/genproto/googleapis/cloud/tasks/v2beta3"
 	iampb "google.golang.org/genproto/googleapis/iam/v1"
@@ -59,7 +60,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("cloudtasks.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("cloudtasks.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("cloudtasks.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/cloudtasks/apiv2beta3/doc.go b/cloudtasks/apiv2beta3/doc.go
index e34cec2..96a6cd9 100644
--- a/cloudtasks/apiv2beta3/doc.go
+++ b/cloudtasks/apiv2beta3/doc.go
@@ -50,7 +50,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/container/apiv1/cluster_manager_client.go b/container/apiv1/cluster_manager_client.go
index 353e538..5949cc9 100644
--- a/container/apiv1/cluster_manager_client.go
+++ b/container/apiv1/cluster_manager_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	containerpb "google.golang.org/genproto/googleapis/container/v1"
 	"google.golang.org/grpc"
@@ -73,7 +74,8 @@
 
 func defaultClusterManagerClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("container.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("container.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("container.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/container/apiv1/doc.go b/container/apiv1/doc.go
index 6e643f7..c0c1f3c 100644
--- a/container/apiv1/doc.go
+++ b/container/apiv1/doc.go
@@ -49,7 +49,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/containeranalysis/apiv1beta1/container_analysis_v1_beta1_client.go b/containeranalysis/apiv1beta1/container_analysis_v1_beta1_client.go
index fdc4618..1c4e5b1 100644
--- a/containeranalysis/apiv1beta1/container_analysis_v1_beta1_client.go
+++ b/containeranalysis/apiv1beta1/container_analysis_v1_beta1_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	containeranalysispb "google.golang.org/genproto/googleapis/devtools/containeranalysis/v1beta1"
 	iampb "google.golang.org/genproto/googleapis/iam/v1"
@@ -49,7 +50,8 @@
 
 func defaultContainerAnalysisV1Beta1ClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("containeranalysis.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("containeranalysis.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("containeranalysis.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/containeranalysis/apiv1beta1/doc.go b/containeranalysis/apiv1beta1/doc.go
index 4383064..66c06aa 100644
--- a/containeranalysis/apiv1beta1/doc.go
+++ b/containeranalysis/apiv1beta1/doc.go
@@ -51,7 +51,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/containeranalysis/apiv1beta1/grafeas_v1_beta1_client.go b/containeranalysis/apiv1beta1/grafeas_v1_beta1_client.go
index c8fe2ef..4dccb08 100644
--- a/containeranalysis/apiv1beta1/grafeas_v1_beta1_client.go
+++ b/containeranalysis/apiv1beta1/grafeas_v1_beta1_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	grafeaspb "google.golang.org/genproto/googleapis/devtools/containeranalysis/v1beta1/grafeas"
 	"google.golang.org/grpc"
@@ -57,7 +58,8 @@
 
 func defaultGrafeasV1Beta1ClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("containeranalysis.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("containeranalysis.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("containeranalysis.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/datacatalog/apiv1/data_catalog_client.go b/datacatalog/apiv1/data_catalog_client.go
index 9489103..2c644b8 100644
--- a/datacatalog/apiv1/data_catalog_client.go
+++ b/datacatalog/apiv1/data_catalog_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	datacatalogpb "google.golang.org/genproto/googleapis/cloud/datacatalog/v1"
 	iampb "google.golang.org/genproto/googleapis/iam/v1"
@@ -70,7 +71,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("datacatalog.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("datacatalog.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("datacatalog.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/datacatalog/apiv1/doc.go b/datacatalog/apiv1/doc.go
index 9208eb9..250df82 100644
--- a/datacatalog/apiv1/doc.go
+++ b/datacatalog/apiv1/doc.go
@@ -49,7 +49,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/datacatalog/apiv1beta1/data_catalog_client.go b/datacatalog/apiv1beta1/data_catalog_client.go
index 2a7b21a..ef41aca 100644
--- a/datacatalog/apiv1beta1/data_catalog_client.go
+++ b/datacatalog/apiv1beta1/data_catalog_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	datacatalogpb "google.golang.org/genproto/googleapis/cloud/datacatalog/v1beta1"
 	iampb "google.golang.org/genproto/googleapis/iam/v1"
@@ -70,7 +71,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("datacatalog.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("datacatalog.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("datacatalog.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/datacatalog/apiv1beta1/doc.go b/datacatalog/apiv1beta1/doc.go
index a5b00ef..bd80268 100644
--- a/datacatalog/apiv1beta1/doc.go
+++ b/datacatalog/apiv1beta1/doc.go
@@ -51,7 +51,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/datacatalog/apiv1beta1/policy_tag_manager_client.go b/datacatalog/apiv1beta1/policy_tag_manager_client.go
index 271ca0a..c07fd62 100644
--- a/datacatalog/apiv1beta1/policy_tag_manager_client.go
+++ b/datacatalog/apiv1beta1/policy_tag_manager_client.go
@@ -26,6 +26,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	datacatalogpb "google.golang.org/genproto/googleapis/cloud/datacatalog/v1beta1"
 	iampb "google.golang.org/genproto/googleapis/iam/v1"
@@ -54,7 +55,8 @@
 
 func defaultPolicyTagManagerClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("datacatalog.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("datacatalog.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("datacatalog.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/datacatalog/apiv1beta1/policy_tag_manager_serialization_client.go b/datacatalog/apiv1beta1/policy_tag_manager_serialization_client.go
index a68ab4e..c9f413c 100644
--- a/datacatalog/apiv1beta1/policy_tag_manager_serialization_client.go
+++ b/datacatalog/apiv1beta1/policy_tag_manager_serialization_client.go
@@ -24,6 +24,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	datacatalogpb "google.golang.org/genproto/googleapis/cloud/datacatalog/v1beta1"
 	"google.golang.org/grpc"
@@ -40,7 +41,8 @@
 
 func defaultPolicyTagManagerSerializationClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("datacatalog.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("datacatalog.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("datacatalog.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dataproc/apiv1/autoscaling_policy_client.go b/dataproc/apiv1/autoscaling_policy_client.go
index 3e76e4e..27718a4 100644
--- a/dataproc/apiv1/autoscaling_policy_client.go
+++ b/dataproc/apiv1/autoscaling_policy_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	dataprocpb "google.golang.org/genproto/googleapis/cloud/dataproc/v1"
 	"google.golang.org/grpc"
@@ -47,7 +48,8 @@
 
 func defaultAutoscalingPolicyClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dataproc.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dataproc.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dataproc.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dataproc/apiv1/cluster_controller_client.go b/dataproc/apiv1/cluster_controller_client.go
index 1fccac5..0c95594 100644
--- a/dataproc/apiv1/cluster_controller_client.go
+++ b/dataproc/apiv1/cluster_controller_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	dataprocpb "google.golang.org/genproto/googleapis/cloud/dataproc/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -51,7 +52,8 @@
 
 func defaultClusterControllerClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dataproc.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dataproc.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dataproc.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dataproc/apiv1/doc.go b/dataproc/apiv1/doc.go
index 53c96ef..404be58 100644
--- a/dataproc/apiv1/doc.go
+++ b/dataproc/apiv1/doc.go
@@ -48,7 +48,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/dataproc/apiv1/job_controller_client.go b/dataproc/apiv1/job_controller_client.go
index 4d47d1e..38496e4 100644
--- a/dataproc/apiv1/job_controller_client.go
+++ b/dataproc/apiv1/job_controller_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	dataprocpb "google.golang.org/genproto/googleapis/cloud/dataproc/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -52,7 +53,8 @@
 
 func defaultJobControllerClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dataproc.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dataproc.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dataproc.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dataproc/apiv1/workflow_template_client.go b/dataproc/apiv1/workflow_template_client.go
index 80b1b92..a180114 100644
--- a/dataproc/apiv1/workflow_template_client.go
+++ b/dataproc/apiv1/workflow_template_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	dataprocpb "google.golang.org/genproto/googleapis/cloud/dataproc/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -52,7 +53,8 @@
 
 func defaultWorkflowTemplateClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dataproc.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dataproc.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dataproc.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dataproc/apiv1beta2/autoscaling_policy_client.go b/dataproc/apiv1beta2/autoscaling_policy_client.go
index e7882f0..bb55f63 100644
--- a/dataproc/apiv1beta2/autoscaling_policy_client.go
+++ b/dataproc/apiv1beta2/autoscaling_policy_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	dataprocpb "google.golang.org/genproto/googleapis/cloud/dataproc/v1beta2"
 	"google.golang.org/grpc"
@@ -47,7 +48,8 @@
 
 func defaultAutoscalingPolicyClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dataproc.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dataproc.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dataproc.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dataproc/apiv1beta2/cluster_controller_client.go b/dataproc/apiv1beta2/cluster_controller_client.go
index bdd7cf0..900d4ed 100644
--- a/dataproc/apiv1beta2/cluster_controller_client.go
+++ b/dataproc/apiv1beta2/cluster_controller_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	dataprocpb "google.golang.org/genproto/googleapis/cloud/dataproc/v1beta2"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -51,7 +52,8 @@
 
 func defaultClusterControllerClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dataproc.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dataproc.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dataproc.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dataproc/apiv1beta2/doc.go b/dataproc/apiv1beta2/doc.go
index c2741b3..f863214 100644
--- a/dataproc/apiv1beta2/doc.go
+++ b/dataproc/apiv1beta2/doc.go
@@ -50,7 +50,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/dataproc/apiv1beta2/job_controller_client.go b/dataproc/apiv1beta2/job_controller_client.go
index ce0cc6f..b8dde1d 100644
--- a/dataproc/apiv1beta2/job_controller_client.go
+++ b/dataproc/apiv1beta2/job_controller_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	dataprocpb "google.golang.org/genproto/googleapis/cloud/dataproc/v1beta2"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -52,7 +53,8 @@
 
 func defaultJobControllerClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dataproc.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dataproc.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dataproc.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dataproc/apiv1beta2/workflow_template_client.go b/dataproc/apiv1beta2/workflow_template_client.go
index b48aa9f..56d577b 100644
--- a/dataproc/apiv1beta2/workflow_template_client.go
+++ b/dataproc/apiv1beta2/workflow_template_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	dataprocpb "google.golang.org/genproto/googleapis/cloud/dataproc/v1beta2"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -52,7 +53,8 @@
 
 func defaultWorkflowTemplateClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dataproc.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dataproc.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dataproc.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/datastore/admin/apiv1/datastore_admin_client.go b/datastore/admin/apiv1/datastore_admin_client.go
index 9cd998c..408fe69 100644
--- a/datastore/admin/apiv1/datastore_admin_client.go
+++ b/datastore/admin/apiv1/datastore_admin_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	adminpb "google.golang.org/genproto/googleapis/datastore/admin/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -49,7 +50,8 @@
 
 func defaultDatastoreAdminClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("datastore.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("datastore.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("datastore.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/datastore/admin/apiv1/doc.go b/datastore/admin/apiv1/doc.go
index 3423ea8..8b40e14 100644
--- a/datastore/admin/apiv1/doc.go
+++ b/datastore/admin/apiv1/doc.go
@@ -51,7 +51,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/datastore/go.mod b/datastore/go.mod
index 6cd2d00..e534dc2 100644
--- a/datastore/go.mod
+++ b/datastore/go.mod
@@ -7,8 +7,8 @@
 	github.com/golang/protobuf v1.4.3
 	github.com/google/go-cmp v0.5.2
 	github.com/googleapis/gax-go/v2 v2.0.5
-	golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6 // indirect
-	google.golang.org/api v0.33.0
-	google.golang.org/genproto v0.0.0-20201021134325-0d71844de594
+	golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 // indirect
+	google.golang.org/api v0.34.0
+	google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5
 	google.golang.org/grpc v1.32.0
 )
diff --git a/datastore/go.sum b/datastore/go.sum
index fb7aac3..add250e 100644
--- a/datastore/go.sum
+++ b/datastore/go.sum
@@ -265,6 +265,8 @@
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20201010224723-4f7140c49acb h1:mUVeFHoDKis5nxCAzoAi7E8Ghb86EXh/RK6wtvJIqRY=
 golang.org/x/net v0.0.0-20201010224723-4f7140c49acb/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974 h1:IX6qOQeG5uLjB/hjjwjedwfjND0hgjPMMyO1RoIXQNI=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45 h1:SVwTIAaPC2U/AvvLNZ2a7OVsmBpC8L5BlwK1whH3hm0=
@@ -286,6 +288,7 @@
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a h1:WXEvlFVvvGxCJLG6REjsT03iWnKLEWinaScsxF2Vm2o=
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -396,8 +399,8 @@
 golang.org/x/tools v0.0.0-20200904185747-39188db58858/go.mod h1:Cj7w3i3Rnn0Xh82ur9kSqwfTHTeVxaDqrfMjpcNT6bE=
 golang.org/x/tools v0.0.0-20201017001424-6003fad69a88 h1:ZB1XYzdDo7c/O48jzjMkvIjnC120Z9/CwgDWhePjQdQ=
 golang.org/x/tools v0.0.0-20201017001424-6003fad69a88/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6 h1:ov/kH02/RUWYnR/kPSTGM8hFzZglJT6cBNDXVDoxmJY=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 h1:rbvTkL9AkFts1cgI78+gG6Yu1pwaqX6hjSJAatB78E4=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
@@ -434,6 +437,8 @@
 google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc=
 google.golang.org/api v0.33.0 h1:+gL0XvACeMIvpwLZ5rQZzLn5cwOsgg8dIcfJ2SYfBVw=
 google.golang.org/api v0.33.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
+google.golang.org/api v0.34.0 h1:k40adF3uR+6x/+hO5Dh4ZFUqFp67vxvbpafFiJxl10A=
+google.golang.org/api v0.34.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
@@ -490,8 +495,8 @@
 google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154 h1:bFFRpT+e8JJVY7lMMfvezL1ZIwqiwmPl2bsE2yx4HqM=
 google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594 h1:JZWUHUjZJojCHxs9ZZLFsnRGKVBXBoOHGxeTSt6OE+Q=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5 h1:YejJbGvoWsTXHab4OKNrzk27Dr7s4lPLnewbHue1+gM=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
diff --git a/debugger/apiv2/controller2_client.go b/debugger/apiv2/controller2_client.go
index d657f05..a10e1cc 100644
--- a/debugger/apiv2/controller2_client.go
+++ b/debugger/apiv2/controller2_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	clouddebuggerpb "google.golang.org/genproto/googleapis/devtools/clouddebugger/v2"
 	"google.golang.org/grpc"
@@ -43,7 +44,8 @@
 
 func defaultController2ClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("clouddebugger.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("clouddebugger.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("clouddebugger.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/debugger/apiv2/debugger2_client.go b/debugger/apiv2/debugger2_client.go
index e5c4606..e00f99c 100644
--- a/debugger/apiv2/debugger2_client.go
+++ b/debugger/apiv2/debugger2_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	clouddebuggerpb "google.golang.org/genproto/googleapis/devtools/clouddebugger/v2"
 	"google.golang.org/grpc"
@@ -45,7 +46,8 @@
 
 func defaultDebugger2ClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("clouddebugger.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("clouddebugger.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("clouddebugger.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/debugger/apiv2/doc.go b/debugger/apiv2/doc.go
index b6a1bf8..b28a4d1 100644
--- a/debugger/apiv2/doc.go
+++ b/debugger/apiv2/doc.go
@@ -49,7 +49,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/dialogflow/apiv2/agents_client.go b/dialogflow/apiv2/agents_client.go
index 005637d..522a248 100644
--- a/dialogflow/apiv2/agents_client.go
+++ b/dialogflow/apiv2/agents_client.go
@@ -30,6 +30,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	dialogflowpb "google.golang.org/genproto/googleapis/cloud/dialogflow/v2"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -55,7 +56,8 @@
 
 func defaultAgentsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dialogflow.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dialogflow/apiv2/contexts_client.go b/dialogflow/apiv2/contexts_client.go
index ceb15a9..eae8896 100644
--- a/dialogflow/apiv2/contexts_client.go
+++ b/dialogflow/apiv2/contexts_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	dialogflowpb "google.golang.org/genproto/googleapis/cloud/dialogflow/v2"
 	"google.golang.org/grpc"
@@ -48,7 +49,8 @@
 
 func defaultContextsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dialogflow.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dialogflow/apiv2/doc.go b/dialogflow/apiv2/doc.go
index 773c12d..0fc7016 100644
--- a/dialogflow/apiv2/doc.go
+++ b/dialogflow/apiv2/doc.go
@@ -49,7 +49,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/dialogflow/apiv2/entity_types_client.go b/dialogflow/apiv2/entity_types_client.go
index 341a6eb..fa753fe 100644
--- a/dialogflow/apiv2/entity_types_client.go
+++ b/dialogflow/apiv2/entity_types_client.go
@@ -30,6 +30,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	dialogflowpb "google.golang.org/genproto/googleapis/cloud/dialogflow/v2"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -56,7 +57,8 @@
 
 func defaultEntityTypesClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dialogflow.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dialogflow/apiv2/environments_client.go b/dialogflow/apiv2/environments_client.go
index a8d990d..44b9e1e 100644
--- a/dialogflow/apiv2/environments_client.go
+++ b/dialogflow/apiv2/environments_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	dialogflowpb "google.golang.org/genproto/googleapis/cloud/dialogflow/v2"
 	"google.golang.org/grpc"
@@ -43,7 +44,8 @@
 
 func defaultEnvironmentsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dialogflow.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dialogflow/apiv2/intents_client.go b/dialogflow/apiv2/intents_client.go
index 34cd8da..915febe 100644
--- a/dialogflow/apiv2/intents_client.go
+++ b/dialogflow/apiv2/intents_client.go
@@ -30,6 +30,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	dialogflowpb "google.golang.org/genproto/googleapis/cloud/dialogflow/v2"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -53,7 +54,8 @@
 
 func defaultIntentsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dialogflow.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dialogflow/apiv2/session_entity_types_client.go b/dialogflow/apiv2/session_entity_types_client.go
index 3156b71..cf1294c 100644
--- a/dialogflow/apiv2/session_entity_types_client.go
+++ b/dialogflow/apiv2/session_entity_types_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	dialogflowpb "google.golang.org/genproto/googleapis/cloud/dialogflow/v2"
 	"google.golang.org/grpc"
@@ -47,7 +48,8 @@
 
 func defaultSessionEntityTypesClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dialogflow.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dialogflow/apiv2/sessions_client.go b/dialogflow/apiv2/sessions_client.go
index ea5f759..c0a019e 100644
--- a/dialogflow/apiv2/sessions_client.go
+++ b/dialogflow/apiv2/sessions_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	dialogflowpb "google.golang.org/genproto/googleapis/cloud/dialogflow/v2"
 	"google.golang.org/grpc"
@@ -42,7 +43,8 @@
 
 func defaultSessionsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dialogflow.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dialogflow/cx/apiv3beta1/agents_client.go b/dialogflow/cx/apiv3beta1/agents_client.go
index 6ee230f..b161344 100644
--- a/dialogflow/cx/apiv3beta1/agents_client.go
+++ b/dialogflow/cx/apiv3beta1/agents_client.go
@@ -30,6 +30,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	cxpb "google.golang.org/genproto/googleapis/cloud/dialogflow/cx/v3beta1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -53,7 +54,8 @@
 
 func defaultAgentsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dialogflow.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dialogflow/cx/apiv3beta1/doc.go b/dialogflow/cx/apiv3beta1/doc.go
index 4cfab02..2e8fa37 100644
--- a/dialogflow/cx/apiv3beta1/doc.go
+++ b/dialogflow/cx/apiv3beta1/doc.go
@@ -51,7 +51,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/dialogflow/cx/apiv3beta1/entity_types_client.go b/dialogflow/cx/apiv3beta1/entity_types_client.go
index 8c264b7..3d6efeb 100644
--- a/dialogflow/cx/apiv3beta1/entity_types_client.go
+++ b/dialogflow/cx/apiv3beta1/entity_types_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	cxpb "google.golang.org/genproto/googleapis/cloud/dialogflow/cx/v3beta1"
 	"google.golang.org/grpc"
@@ -47,7 +48,8 @@
 
 func defaultEntityTypesClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dialogflow.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dialogflow/cx/apiv3beta1/environments_client.go b/dialogflow/cx/apiv3beta1/environments_client.go
index 2f84422..dd93164 100644
--- a/dialogflow/cx/apiv3beta1/environments_client.go
+++ b/dialogflow/cx/apiv3beta1/environments_client.go
@@ -30,6 +30,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	cxpb "google.golang.org/genproto/googleapis/cloud/dialogflow/cx/v3beta1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -52,7 +53,8 @@
 
 func defaultEnvironmentsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dialogflow.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dialogflow/cx/apiv3beta1/flows_client.go b/dialogflow/cx/apiv3beta1/flows_client.go
index 433902e..d5f75eb 100644
--- a/dialogflow/cx/apiv3beta1/flows_client.go
+++ b/dialogflow/cx/apiv3beta1/flows_client.go
@@ -30,6 +30,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	cxpb "google.golang.org/genproto/googleapis/cloud/dialogflow/cx/v3beta1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -52,7 +53,8 @@
 
 func defaultFlowsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dialogflow.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dialogflow/cx/apiv3beta1/intents_client.go b/dialogflow/cx/apiv3beta1/intents_client.go
index a6478b0..5f2bcb8 100644
--- a/dialogflow/cx/apiv3beta1/intents_client.go
+++ b/dialogflow/cx/apiv3beta1/intents_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	cxpb "google.golang.org/genproto/googleapis/cloud/dialogflow/cx/v3beta1"
 	"google.golang.org/grpc"
@@ -47,7 +48,8 @@
 
 func defaultIntentsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dialogflow.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dialogflow/cx/apiv3beta1/pages_client.go b/dialogflow/cx/apiv3beta1/pages_client.go
index 91cfc6f..257a412 100644
--- a/dialogflow/cx/apiv3beta1/pages_client.go
+++ b/dialogflow/cx/apiv3beta1/pages_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	cxpb "google.golang.org/genproto/googleapis/cloud/dialogflow/cx/v3beta1"
 	"google.golang.org/grpc"
@@ -47,7 +48,8 @@
 
 func defaultPagesClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dialogflow.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dialogflow/cx/apiv3beta1/session_entity_types_client.go b/dialogflow/cx/apiv3beta1/session_entity_types_client.go
index 9b8f89f..45d438e 100644
--- a/dialogflow/cx/apiv3beta1/session_entity_types_client.go
+++ b/dialogflow/cx/apiv3beta1/session_entity_types_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	cxpb "google.golang.org/genproto/googleapis/cloud/dialogflow/cx/v3beta1"
 	"google.golang.org/grpc"
@@ -47,7 +48,8 @@
 
 func defaultSessionEntityTypesClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dialogflow.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dialogflow/cx/apiv3beta1/sessions_client.go b/dialogflow/cx/apiv3beta1/sessions_client.go
index 781349e..3f8311a 100644
--- a/dialogflow/cx/apiv3beta1/sessions_client.go
+++ b/dialogflow/cx/apiv3beta1/sessions_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	cxpb "google.golang.org/genproto/googleapis/cloud/dialogflow/cx/v3beta1"
 	"google.golang.org/grpc"
@@ -44,7 +45,8 @@
 
 func defaultSessionsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dialogflow.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dialogflow/cx/apiv3beta1/transition_route_groups_client.go b/dialogflow/cx/apiv3beta1/transition_route_groups_client.go
index b42ace1..43e2754 100644
--- a/dialogflow/cx/apiv3beta1/transition_route_groups_client.go
+++ b/dialogflow/cx/apiv3beta1/transition_route_groups_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	cxpb "google.golang.org/genproto/googleapis/cloud/dialogflow/cx/v3beta1"
 	"google.golang.org/grpc"
@@ -47,7 +48,8 @@
 
 func defaultTransitionRouteGroupsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dialogflow.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dialogflow/cx/apiv3beta1/versions_client.go b/dialogflow/cx/apiv3beta1/versions_client.go
index 1f01318..4a95218 100644
--- a/dialogflow/cx/apiv3beta1/versions_client.go
+++ b/dialogflow/cx/apiv3beta1/versions_client.go
@@ -30,6 +30,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	cxpb "google.golang.org/genproto/googleapis/cloud/dialogflow/cx/v3beta1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -52,7 +53,8 @@
 
 func defaultVersionsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dialogflow.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dialogflow/cx/apiv3beta1/webhooks_client.go b/dialogflow/cx/apiv3beta1/webhooks_client.go
index d6bfb18..97a28c6 100644
--- a/dialogflow/cx/apiv3beta1/webhooks_client.go
+++ b/dialogflow/cx/apiv3beta1/webhooks_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	cxpb "google.golang.org/genproto/googleapis/cloud/dialogflow/cx/v3beta1"
 	"google.golang.org/grpc"
@@ -47,7 +48,8 @@
 
 func defaultWebhooksClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dialogflow.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dialogflow.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dlp/apiv2/dlp_client.go b/dlp/apiv2/dlp_client.go
index 6315a51..efb64bf 100644
--- a/dlp/apiv2/dlp_client.go
+++ b/dlp/apiv2/dlp_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	dlppb "google.golang.org/genproto/googleapis/privacy/dlp/v2"
 	"google.golang.org/grpc"
@@ -76,7 +77,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("dlp.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("dlp.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("dlp.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/dlp/apiv2/doc.go b/dlp/apiv2/doc.go
index 70d5f0e..4f86537 100644
--- a/dlp/apiv2/doc.go
+++ b/dlp/apiv2/doc.go
@@ -50,7 +50,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/errorreporting/apiv1beta1/doc.go b/errorreporting/apiv1beta1/doc.go
index 61f11e2..fa59df5 100644
--- a/errorreporting/apiv1beta1/doc.go
+++ b/errorreporting/apiv1beta1/doc.go
@@ -52,7 +52,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/errorreporting/apiv1beta1/error_group_client.go b/errorreporting/apiv1beta1/error_group_client.go
index 328db4f..5f83811 100644
--- a/errorreporting/apiv1beta1/error_group_client.go
+++ b/errorreporting/apiv1beta1/error_group_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	clouderrorreportingpb "google.golang.org/genproto/googleapis/devtools/clouderrorreporting/v1beta1"
 	"google.golang.org/grpc"
@@ -42,7 +43,8 @@
 
 func defaultErrorGroupClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("clouderrorreporting.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("clouderrorreporting.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("clouderrorreporting.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/errorreporting/apiv1beta1/error_stats_client.go b/errorreporting/apiv1beta1/error_stats_client.go
index fe5fd05..12f2df8 100644
--- a/errorreporting/apiv1beta1/error_stats_client.go
+++ b/errorreporting/apiv1beta1/error_stats_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	clouderrorreportingpb "google.golang.org/genproto/googleapis/devtools/clouderrorreporting/v1beta1"
 	"google.golang.org/grpc"
@@ -45,7 +46,8 @@
 
 func defaultErrorStatsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("clouderrorreporting.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("clouderrorreporting.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("clouderrorreporting.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/errorreporting/apiv1beta1/report_errors_client.go b/errorreporting/apiv1beta1/report_errors_client.go
index 2c6cf02..507f521 100644
--- a/errorreporting/apiv1beta1/report_errors_client.go
+++ b/errorreporting/apiv1beta1/report_errors_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	clouderrorreportingpb "google.golang.org/genproto/googleapis/devtools/clouderrorreporting/v1beta1"
 	"google.golang.org/grpc"
@@ -40,7 +41,8 @@
 
 func defaultReportErrorsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("clouderrorreporting.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("clouderrorreporting.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("clouderrorreporting.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/firestore/apiv1/admin/doc.go b/firestore/apiv1/admin/doc.go
index 8968999..1438897 100644
--- a/firestore/apiv1/admin/doc.go
+++ b/firestore/apiv1/admin/doc.go
@@ -49,7 +49,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/firestore/apiv1/admin/firestore_admin_client.go b/firestore/apiv1/admin/firestore_admin_client.go
index c830ffe..37c0fa8 100644
--- a/firestore/apiv1/admin/firestore_admin_client.go
+++ b/firestore/apiv1/admin/firestore_admin_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	adminpb "google.golang.org/genproto/googleapis/firestore/admin/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -54,7 +55,8 @@
 
 func defaultFirestoreAdminClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("firestore.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("firestore.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("firestore.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/firestore/apiv1/doc.go b/firestore/apiv1/doc.go
index aac8cc6..2d3def5 100644
--- a/firestore/apiv1/doc.go
+++ b/firestore/apiv1/doc.go
@@ -49,7 +49,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/firestore/apiv1/firestore_client.go b/firestore/apiv1/firestore_client.go
index aa768eb..32cdb88 100644
--- a/firestore/apiv1/firestore_client.go
+++ b/firestore/apiv1/firestore_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	firestorepb "google.golang.org/genproto/googleapis/firestore/v1"
 	"google.golang.org/grpc"
@@ -57,7 +58,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("firestore.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("firestore.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("firestore.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/firestore/go.mod b/firestore/go.mod
index 39c5d63..aad4b75 100644
--- a/firestore/go.mod
+++ b/firestore/go.mod
@@ -7,8 +7,8 @@
 	github.com/golang/protobuf v1.4.3
 	github.com/google/go-cmp v0.5.2
 	github.com/googleapis/gax-go/v2 v2.0.5
-	golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6 // indirect
-	google.golang.org/api v0.33.0
-	google.golang.org/genproto v0.0.0-20201021134325-0d71844de594
+	golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 // indirect
+	google.golang.org/api v0.34.0
+	google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5
 	google.golang.org/grpc v1.32.0
 )
diff --git a/firestore/go.sum b/firestore/go.sum
index 34b6c60..44f1b19 100644
--- a/firestore/go.sum
+++ b/firestore/go.sum
@@ -266,6 +266,8 @@
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20201010224723-4f7140c49acb h1:mUVeFHoDKis5nxCAzoAi7E8Ghb86EXh/RK6wtvJIqRY=
 golang.org/x/net v0.0.0-20201010224723-4f7140c49acb/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974 h1:IX6qOQeG5uLjB/hjjwjedwfjND0hgjPMMyO1RoIXQNI=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45 h1:SVwTIAaPC2U/AvvLNZ2a7OVsmBpC8L5BlwK1whH3hm0=
@@ -287,6 +289,7 @@
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a h1:WXEvlFVvvGxCJLG6REjsT03iWnKLEWinaScsxF2Vm2o=
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -398,8 +401,8 @@
 golang.org/x/tools v0.0.0-20200904185747-39188db58858/go.mod h1:Cj7w3i3Rnn0Xh82ur9kSqwfTHTeVxaDqrfMjpcNT6bE=
 golang.org/x/tools v0.0.0-20201017001424-6003fad69a88 h1:ZB1XYzdDo7c/O48jzjMkvIjnC120Z9/CwgDWhePjQdQ=
 golang.org/x/tools v0.0.0-20201017001424-6003fad69a88/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6 h1:ov/kH02/RUWYnR/kPSTGM8hFzZglJT6cBNDXVDoxmJY=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 h1:rbvTkL9AkFts1cgI78+gG6Yu1pwaqX6hjSJAatB78E4=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -423,6 +426,8 @@
 google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc=
 google.golang.org/api v0.33.0 h1:+gL0XvACeMIvpwLZ5rQZzLn5cwOsgg8dIcfJ2SYfBVw=
 google.golang.org/api v0.33.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
+google.golang.org/api v0.34.0 h1:k40adF3uR+6x/+hO5Dh4ZFUqFp67vxvbpafFiJxl10A=
+google.golang.org/api v0.34.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
@@ -462,8 +467,8 @@
 google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154 h1:bFFRpT+e8JJVY7lMMfvezL1ZIwqiwmPl2bsE2yx4HqM=
 google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594 h1:JZWUHUjZJojCHxs9ZZLFsnRGKVBXBoOHGxeTSt6OE+Q=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5 h1:YejJbGvoWsTXHab4OKNrzk27Dr7s4lPLnewbHue1+gM=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
diff --git a/functions/apiv1/cloud_functions_client.go b/functions/apiv1/cloud_functions_client.go
index e024067..690b8c3 100644
--- a/functions/apiv1/cloud_functions_client.go
+++ b/functions/apiv1/cloud_functions_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	functionspb "google.golang.org/genproto/googleapis/cloud/functions/v1"
 	iampb "google.golang.org/genproto/googleapis/iam/v1"
@@ -56,7 +57,8 @@
 
 func defaultCloudFunctionsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("cloudfunctions.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("cloudfunctions.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("cloudfunctions.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/functions/apiv1/doc.go b/functions/apiv1/doc.go
index 3a3449c..c3f9bad 100644
--- a/functions/apiv1/doc.go
+++ b/functions/apiv1/doc.go
@@ -44,7 +44,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/gaming/apiv1/doc.go b/gaming/apiv1/doc.go
index 3be5446..c71f7b9 100644
--- a/gaming/apiv1/doc.go
+++ b/gaming/apiv1/doc.go
@@ -44,7 +44,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/gaming/apiv1/game_server_clusters_client.go b/gaming/apiv1/game_server_clusters_client.go
index 9137272..0087243 100644
--- a/gaming/apiv1/game_server_clusters_client.go
+++ b/gaming/apiv1/game_server_clusters_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	gamingpb "google.golang.org/genproto/googleapis/cloud/gaming/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -53,7 +54,8 @@
 
 func defaultGameServerClustersClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("gameservices.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("gameservices.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("gameservices.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/gaming/apiv1/game_server_configs_client.go b/gaming/apiv1/game_server_configs_client.go
index b50292a..8581334 100644
--- a/gaming/apiv1/game_server_configs_client.go
+++ b/gaming/apiv1/game_server_configs_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	gamingpb "google.golang.org/genproto/googleapis/cloud/gaming/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -49,7 +50,8 @@
 
 func defaultGameServerConfigsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("gameservices.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("gameservices.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("gameservices.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/gaming/apiv1/game_server_deployments_client.go b/gaming/apiv1/game_server_deployments_client.go
index 3b0bf53..2653989 100644
--- a/gaming/apiv1/game_server_deployments_client.go
+++ b/gaming/apiv1/game_server_deployments_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	gamingpb "google.golang.org/genproto/googleapis/cloud/gaming/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -54,7 +55,8 @@
 
 func defaultGameServerDeploymentsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("gameservices.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("gameservices.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("gameservices.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/gaming/apiv1/realms_client.go b/gaming/apiv1/realms_client.go
index 965529e..20dfe47 100644
--- a/gaming/apiv1/realms_client.go
+++ b/gaming/apiv1/realms_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	gamingpb "google.golang.org/genproto/googleapis/cloud/gaming/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -51,7 +52,8 @@
 
 func defaultRealmsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("gameservices.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("gameservices.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("gameservices.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/gaming/apiv1beta/doc.go b/gaming/apiv1beta/doc.go
index 17846e3..c16a56e 100644
--- a/gaming/apiv1beta/doc.go
+++ b/gaming/apiv1beta/doc.go
@@ -46,7 +46,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/gaming/apiv1beta/game_server_clusters_client.go b/gaming/apiv1beta/game_server_clusters_client.go
index 5c2bd9c..1af239e 100644
--- a/gaming/apiv1beta/game_server_clusters_client.go
+++ b/gaming/apiv1beta/game_server_clusters_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	gamingpb "google.golang.org/genproto/googleapis/cloud/gaming/v1beta"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -53,7 +54,8 @@
 
 func defaultGameServerClustersClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("gameservices.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("gameservices.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("gameservices.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/gaming/apiv1beta/game_server_configs_client.go b/gaming/apiv1beta/game_server_configs_client.go
index 21b4da6..3e52989 100644
--- a/gaming/apiv1beta/game_server_configs_client.go
+++ b/gaming/apiv1beta/game_server_configs_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	gamingpb "google.golang.org/genproto/googleapis/cloud/gaming/v1beta"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -49,7 +50,8 @@
 
 func defaultGameServerConfigsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("gameservices.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("gameservices.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("gameservices.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/gaming/apiv1beta/game_server_deployments_client.go b/gaming/apiv1beta/game_server_deployments_client.go
index 1bbd622..f411f72 100644
--- a/gaming/apiv1beta/game_server_deployments_client.go
+++ b/gaming/apiv1beta/game_server_deployments_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	gamingpb "google.golang.org/genproto/googleapis/cloud/gaming/v1beta"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -54,7 +55,8 @@
 
 func defaultGameServerDeploymentsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("gameservices.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("gameservices.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("gameservices.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/gaming/apiv1beta/realms_client.go b/gaming/apiv1beta/realms_client.go
index c6ba7a6..894cc52 100644
--- a/gaming/apiv1beta/realms_client.go
+++ b/gaming/apiv1beta/realms_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	gamingpb "google.golang.org/genproto/googleapis/cloud/gaming/v1beta"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -51,7 +52,8 @@
 
 func defaultRealmsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("gameservices.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("gameservices.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("gameservices.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/go.mod b/go.mod
index 213e0be..ee770e7 100644
--- a/go.mod
+++ b/go.mod
@@ -13,11 +13,11 @@
 	github.com/jstemmer/go-junit-report v0.9.1
 	go.opencensus.io v0.22.5
 	golang.org/x/lint v0.0.0-20200302205851-738671d3881b
-	golang.org/x/net v0.0.0-20201020065357-d65d470038a5
+	golang.org/x/net v0.0.0-20201021035429-f5854403a974
 	golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43
 	golang.org/x/text v0.3.3
-	golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6
-	google.golang.org/api v0.33.0
-	google.golang.org/genproto v0.0.0-20201021134325-0d71844de594
+	golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6
+	google.golang.org/api v0.34.0
+	google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5
 	google.golang.org/grpc v1.32.0
 )
diff --git a/go.sum b/go.sum
index 76ef120..cdd4fca 100644
--- a/go.sum
+++ b/go.sum
@@ -262,8 +262,8 @@
 golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200822124328-c89045814202 h1:VvcQYSHwXgi7W+TpUR6A9g6Up98WAHf3f/ulnJ62IyA=
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
-golang.org/x/net v0.0.0-20201020065357-d65d470038a5 h1:KrxvpY64uUzANd9wKWr6ZAsufiii93XnvXaeikyCJ2g=
-golang.org/x/net v0.0.0-20201020065357-d65d470038a5/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974 h1:IX6qOQeG5uLjB/hjjwjedwfjND0hgjPMMyO1RoIXQNI=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421 h1:Wo7BWFiOk0QRFMLYMqJGFMd9CgUAcGx7V+qEg/h5IBI=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -287,6 +287,8 @@
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208 h1:qwRHBd0NqMbJxfbotnDhm2ByMI1Shq4Y6oRJo21SGJA=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9 h1:SQFwaSi55rU7vdNs9Yr0Z324VNlrF+0wMqRXT4St8ck=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a h1:1BGLXjeY4akVXGgbC9HugT3Jv3hCI0z56oJR5vAMgBU=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -386,8 +388,8 @@
 golang.org/x/tools v0.0.0-20200804011535-6c149bb5ef0d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200825202427-b303f430e36d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200904185747-39188db58858/go.mod h1:Cj7w3i3Rnn0Xh82ur9kSqwfTHTeVxaDqrfMjpcNT6bE=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6 h1:ov/kH02/RUWYnR/kPSTGM8hFzZglJT6cBNDXVDoxmJY=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 h1:rbvTkL9AkFts1cgI78+gG6Yu1pwaqX6hjSJAatB78E4=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
@@ -418,8 +420,8 @@
 google.golang.org/api v0.29.0/go.mod h1:Lcubydp8VUV7KeIHD9z2Bys/sm/vGKnG1UHuDBSrHWM=
 google.golang.org/api v0.30.0 h1:yfrXXP61wVuLb0vBcG6qaOoIoqYEzOQS8jum51jkv2w=
 google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc=
-google.golang.org/api v0.33.0 h1:+gL0XvACeMIvpwLZ5rQZzLn5cwOsgg8dIcfJ2SYfBVw=
-google.golang.org/api v0.33.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
+google.golang.org/api v0.34.0 h1:k40adF3uR+6x/+hO5Dh4ZFUqFp67vxvbpafFiJxl10A=
+google.golang.org/api v0.34.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0 h1:/wp5JvzpHIxhs/dumFmF7BXTf3Z+dd4uXta4kVyO508=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
@@ -469,8 +471,8 @@
 google.golang.org/genproto v0.0.0-20200804131852-c06518451d9c/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20200825200019-8632dd797987/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594 h1:JZWUHUjZJojCHxs9ZZLFsnRGKVBXBoOHGxeTSt6OE+Q=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5 h1:YejJbGvoWsTXHab4OKNrzk27Dr7s4lPLnewbHue1+gM=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v1.19.0 h1:cfg4PD8YEdSFnm7qLV4++93WcmhH2nIUhMjhdCvl3j8=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1 h1:Hz2g2wirWK7H0qIIhGIqRGTuMwTE8HEKFnDZZ7lm9NU=
diff --git a/iam/credentials/apiv1/doc.go b/iam/credentials/apiv1/doc.go
index 1b2b4b9..b2b99ea 100644
--- a/iam/credentials/apiv1/doc.go
+++ b/iam/credentials/apiv1/doc.go
@@ -49,7 +49,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/iam/credentials/apiv1/iam_credentials_client.go b/iam/credentials/apiv1/iam_credentials_client.go
index 23dc4af..0ab4208 100644
--- a/iam/credentials/apiv1/iam_credentials_client.go
+++ b/iam/credentials/apiv1/iam_credentials_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	credentialspb "google.golang.org/genproto/googleapis/iam/credentials/v1"
 	"google.golang.org/grpc"
@@ -44,7 +45,8 @@
 
 func defaultIamCredentialsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("iamcredentials.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("iamcredentials.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("iamcredentials.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/internal/examples/fake/go.mod b/internal/examples/fake/go.mod
index ed6ed46..21c5893 100644
--- a/internal/examples/fake/go.mod
+++ b/internal/examples/fake/go.mod
@@ -5,7 +5,8 @@
 require (
 	cloud.google.com/go v0.68.0
 	github.com/golang/protobuf v1.4.3 // indirect
-	google.golang.org/api v0.33.0
-	google.golang.org/genproto v0.0.0-20201021134325-0d71844de594
+	golang.org/x/net v0.0.0-20201021035429-f5854403a974 // indirect
+	google.golang.org/api v0.34.0
+	google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5
 	google.golang.org/grpc v1.32.0
 )
diff --git a/internal/examples/fake/go.sum b/internal/examples/fake/go.sum
index 5435a8e..3c5037a 100644
--- a/internal/examples/fake/go.sum
+++ b/internal/examples/fake/go.sum
@@ -191,6 +191,8 @@
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200927032502-5d4f70055728 h1:5wtQIAulKU5AbLQOkjxl32UufnIOqgBX72pS0AV14H0=
 golang.org/x/net v0.0.0-20200927032502-5d4f70055728/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974 h1:IX6qOQeG5uLjB/hjjwjedwfjND0hgjPMMyO1RoIXQNI=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -233,6 +235,8 @@
 golang.org/x/sys v0.0.0-20200803210538-64077c9b5642/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200905004654-be1d3432aa8f h1:Fqb3ao1hUmOR3GkUOg/Y+BadLwykBIzs5q8Ez2SbHyc=
 golang.org/x/sys v0.0.0-20200905004654-be1d3432aa8f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f h1:+Nyd8tzPX9R7BWHguqsrbFdRx3WQ/1ib8I44HXV5yTA=
+golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@@ -308,8 +312,8 @@
 google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc=
 google.golang.org/api v0.32.0 h1:Le77IccnTqEa8ryp9wIpX5W3zYm7Gf9LhOp9PHcwFts=
 google.golang.org/api v0.32.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
-google.golang.org/api v0.33.0 h1:+gL0XvACeMIvpwLZ5rQZzLn5cwOsgg8dIcfJ2SYfBVw=
-google.golang.org/api v0.33.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
+google.golang.org/api v0.34.0 h1:k40adF3uR+6x/+hO5Dh4ZFUqFp67vxvbpafFiJxl10A=
+google.golang.org/api v0.34.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
@@ -349,8 +353,8 @@
 google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20201002142447-3860012362da h1:DTQYk4u7nICKkkVZsBv0/0po0ChISxAJ5CTAfUhO0PQ=
 google.golang.org/genproto v0.0.0-20201002142447-3860012362da/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594 h1:JZWUHUjZJojCHxs9ZZLFsnRGKVBXBoOHGxeTSt6OE+Q=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5 h1:YejJbGvoWsTXHab4OKNrzk27Dr7s4lPLnewbHue1+gM=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
diff --git a/internal/examples/mock/go.mod b/internal/examples/mock/go.mod
index 9f94fdf..9ff2a37 100644
--- a/internal/examples/mock/go.mod
+++ b/internal/examples/mock/go.mod
@@ -6,11 +6,9 @@
 	github.com/golang/protobuf v1.4.3 // indirect
 	github.com/google/go-cmp v0.5.2 // indirect
 	github.com/googleapis/gax-go/v2 v2.0.5
-	golang.org/x/net v0.0.0-20200822124328-c89045814202 // indirect
-	golang.org/x/sys v0.0.0-20200905004654-be1d3432aa8f // indirect
-	golang.org/x/text v0.3.3 // indirect
+	golang.org/x/net v0.0.0-20201021035429-f5854403a974 // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
-	google.golang.org/genproto v0.0.0-20201021134325-0d71844de594
+	google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5
 	google.golang.org/grpc v1.31.1 // indirect
 	google.golang.org/protobuf v1.25.0 // indirect
 )
diff --git a/internal/examples/mock/go.sum b/internal/examples/mock/go.sum
index 0c21b88..e272b0e 100644
--- a/internal/examples/mock/go.sum
+++ b/internal/examples/mock/go.sum
@@ -46,8 +46,8 @@
 golang.org/x/net v0.0.0-20190311183353-d8887717615a h1:oWX7TPOiFAMXLq8o0ikBYfCJVlRHBcsciT5bXOrH628=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20200822124328-c89045814202 h1:VvcQYSHwXgi7W+TpUR6A9g6Up98WAHf3f/ulnJ62IyA=
-golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974 h1:IX6qOQeG5uLjB/hjjwjedwfjND0hgjPMMyO1RoIXQNI=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -56,9 +56,8 @@
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a h1:1BGLXjeY4akVXGgbC9HugT3Jv3hCI0z56oJR5vAMgBU=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200905004654-be1d3432aa8f h1:Fqb3ao1hUmOR3GkUOg/Y+BadLwykBIzs5q8Ez2SbHyc=
-golang.org/x/sys v0.0.0-20200905004654-be1d3432aa8f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f h1:+Nyd8tzPX9R7BWHguqsrbFdRx3WQ/1ib8I44HXV5yTA=
+golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k=
@@ -77,8 +76,8 @@
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594 h1:JZWUHUjZJojCHxs9ZZLFsnRGKVBXBoOHGxeTSt6OE+Q=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5 h1:YejJbGvoWsTXHab4OKNrzk27Dr7s4lPLnewbHue1+gM=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
diff --git a/internal/gapicgen/go.mod b/internal/gapicgen/go.mod
index 26c661f..b2dfd80 100644
--- a/internal/gapicgen/go.mod
+++ b/internal/gapicgen/go.mod
@@ -11,9 +11,9 @@
 	github.com/shurcooL/githubv4 v0.0.0-20200928013246-d292edc3691b
 	github.com/shurcooL/graphql v0.0.0-20181231061246-d48a9a75455f // indirect
 	github.com/stretchr/testify v1.5.1 // indirect
+	golang.org/x/net v0.0.0-20201021035429-f5854403a974 // indirect
 	golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43
-	golang.org/x/sync v0.0.0-20201008141435-b3e1573b7520
-	golang.org/x/sys v0.0.0-20200905004654-be1d3432aa8f // indirect
+	golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9
 	gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect
 	gopkg.in/src-d/go-git.v4 v4.13.1
 	gopkg.in/yaml.v2 v2.3.0
diff --git a/internal/gapicgen/go.sum b/internal/gapicgen/go.sum
index 906304c..28fc434 100644
--- a/internal/gapicgen/go.sum
+++ b/internal/gapicgen/go.sum
@@ -250,6 +250,8 @@
 golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200822124328-c89045814202 h1:VvcQYSHwXgi7W+TpUR6A9g6Up98WAHf3f/ulnJ62IyA=
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974 h1:IX6qOQeG5uLjB/hjjwjedwfjND0hgjPMMyO1RoIXQNI=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -268,8 +270,8 @@
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208 h1:qwRHBd0NqMbJxfbotnDhm2ByMI1Shq4Y6oRJo21SGJA=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20201008141435-b3e1573b7520 h1:Bx6FllMpG4NWDOfhMBz1VR2QYNp/SAOHPIAsaVmxfPo=
-golang.org/x/sync v0.0.0-20201008141435-b3e1573b7520/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9 h1:SQFwaSi55rU7vdNs9Yr0Z324VNlrF+0wMqRXT4St8ck=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190221075227-b4e8571b14e0/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -298,8 +300,8 @@
 golang.org/x/sys v0.0.0-20200515095857-1151b9dac4a9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200523222454-059865788121/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200803210538-64077c9b5642/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200905004654-be1d3432aa8f h1:Fqb3ao1hUmOR3GkUOg/Y+BadLwykBIzs5q8Ez2SbHyc=
-golang.org/x/sys v0.0.0-20200905004654-be1d3432aa8f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f h1:+Nyd8tzPX9R7BWHguqsrbFdRx3WQ/1ib8I44HXV5yTA=
+golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
diff --git a/internal/godocfx/go.mod b/internal/godocfx/go.mod
index fc3d8e2..183f647 100644
--- a/internal/godocfx/go.mod
+++ b/internal/godocfx/go.mod
@@ -8,7 +8,7 @@
 	cloud.google.com/go/datastore v1.1.0
 	cloud.google.com/go/storage v1.11.0
 	github.com/kr/pretty v0.2.1 // indirect
-	golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6
+	golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6
 	google.golang.org/protobuf v1.25.0 // indirect
 	gopkg.in/yaml.v2 v2.3.0
 )
diff --git a/internal/godocfx/go.sum b/internal/godocfx/go.sum
index 1e750a6..2726ae6 100644
--- a/internal/godocfx/go.sum
+++ b/internal/godocfx/go.sum
@@ -154,8 +154,8 @@
 golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200822124328-c89045814202 h1:VvcQYSHwXgi7W+TpUR6A9g6Up98WAHf3f/ulnJ62IyA=
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
-golang.org/x/net v0.0.0-20201020065357-d65d470038a5 h1:KrxvpY64uUzANd9wKWr6ZAsufiii93XnvXaeikyCJ2g=
-golang.org/x/net v0.0.0-20201020065357-d65d470038a5/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974 h1:IX6qOQeG5uLjB/hjjwjedwfjND0hgjPMMyO1RoIXQNI=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20191202225959-858c2ad4c8b6/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -172,6 +172,7 @@
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208 h1:qwRHBd0NqMbJxfbotnDhm2ByMI1Shq4Y6oRJo21SGJA=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -233,8 +234,8 @@
 golang.org/x/tools v0.0.0-20200804011535-6c149bb5ef0d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200827163409-021d7c6f1ec3/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200904185747-39188db58858/go.mod h1:Cj7w3i3Rnn0Xh82ur9kSqwfTHTeVxaDqrfMjpcNT6bE=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6 h1:ov/kH02/RUWYnR/kPSTGM8hFzZglJT6cBNDXVDoxmJY=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 h1:rbvTkL9AkFts1cgI78+gG6Yu1pwaqX6hjSJAatB78E4=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -253,8 +254,8 @@
 google.golang.org/api v0.28.0/go.mod h1:lIXQywCXRcnZPGlsd8NbLnOjtAoL6em04bJ9+z0MncE=
 google.golang.org/api v0.30.0 h1:yfrXXP61wVuLb0vBcG6qaOoIoqYEzOQS8jum51jkv2w=
 google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc=
-google.golang.org/api v0.33.0 h1:+gL0XvACeMIvpwLZ5rQZzLn5cwOsgg8dIcfJ2SYfBVw=
-google.golang.org/api v0.33.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
+google.golang.org/api v0.34.0 h1:k40adF3uR+6x/+hO5Dh4ZFUqFp67vxvbpafFiJxl10A=
+google.golang.org/api v0.34.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
@@ -285,8 +286,8 @@
 google.golang.org/genproto v0.0.0-20200804131852-c06518451d9c/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20200827165113-ac2560b5e952/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594 h1:JZWUHUjZJojCHxs9ZZLFsnRGKVBXBoOHGxeTSt6OE+Q=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5 h1:YejJbGvoWsTXHab4OKNrzk27Dr7s4lPLnewbHue1+gM=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
diff --git a/iot/apiv1/device_manager_client.go b/iot/apiv1/device_manager_client.go
index f3f613c..efaad05 100644
--- a/iot/apiv1/device_manager_client.go
+++ b/iot/apiv1/device_manager_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	iotpb "google.golang.org/genproto/googleapis/cloud/iot/v1"
 	iampb "google.golang.org/genproto/googleapis/iam/v1"
@@ -62,7 +63,8 @@
 
 func defaultDeviceManagerClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("cloudiot.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("cloudiot.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("cloudiot.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/iot/apiv1/doc.go b/iot/apiv1/doc.go
index 443308b..8c936f2 100644
--- a/iot/apiv1/doc.go
+++ b/iot/apiv1/doc.go
@@ -49,7 +49,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/kms/apiv1/doc.go b/kms/apiv1/doc.go
index bfea2f9..1ff3fb5 100644
--- a/kms/apiv1/doc.go
+++ b/kms/apiv1/doc.go
@@ -49,7 +49,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/kms/apiv1/key_management_client.go b/kms/apiv1/key_management_client.go
index 4ed424a..5bc283d 100644
--- a/kms/apiv1/key_management_client.go
+++ b/kms/apiv1/key_management_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	kmspb "google.golang.org/genproto/googleapis/cloud/kms/v1"
 	"google.golang.org/grpc"
@@ -65,7 +66,8 @@
 
 func defaultKeyManagementClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("cloudkms.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("cloudkms.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("cloudkms.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/language/apiv1/doc.go b/language/apiv1/doc.go
index 6fa8dcb..5155bea 100644
--- a/language/apiv1/doc.go
+++ b/language/apiv1/doc.go
@@ -50,7 +50,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/language/apiv1/language_client.go b/language/apiv1/language_client.go
index 4d1bcee..fee99a0 100644
--- a/language/apiv1/language_client.go
+++ b/language/apiv1/language_client.go
@@ -23,6 +23,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	languagepb "google.golang.org/genproto/googleapis/cloud/language/v1"
 	"google.golang.org/grpc"
@@ -44,7 +45,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("language.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("language.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("language.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/language/apiv1beta2/doc.go b/language/apiv1beta2/doc.go
index 666cab7..c8d39ef 100644
--- a/language/apiv1beta2/doc.go
+++ b/language/apiv1beta2/doc.go
@@ -52,7 +52,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/language/apiv1beta2/language_client.go b/language/apiv1beta2/language_client.go
index 974785a..1eda758 100644
--- a/language/apiv1beta2/language_client.go
+++ b/language/apiv1beta2/language_client.go
@@ -23,6 +23,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	languagepb "google.golang.org/genproto/googleapis/cloud/language/v1beta2"
 	"google.golang.org/grpc"
@@ -44,7 +45,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("language.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("language.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("language.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/logging/apiv2/config_client.go b/logging/apiv2/config_client.go
index 0f58829..73d3591 100644
--- a/logging/apiv2/config_client.go
+++ b/logging/apiv2/config_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	loggingpb "google.golang.org/genproto/googleapis/logging/v2"
 	"google.golang.org/grpc"
@@ -57,7 +58,8 @@
 
 func defaultConfigClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("logging.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("logging.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("logging.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/logging/apiv2/doc.go b/logging/apiv2/doc.go
index da556e6..304bd96 100644
--- a/logging/apiv2/doc.go
+++ b/logging/apiv2/doc.go
@@ -51,7 +51,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/logging/apiv2/logging_client.go b/logging/apiv2/logging_client.go
index 750ea8d..2aac5ee 100644
--- a/logging/apiv2/logging_client.go
+++ b/logging/apiv2/logging_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	monitoredrespb "google.golang.org/genproto/googleapis/api/monitoredres"
 	loggingpb "google.golang.org/genproto/googleapis/logging/v2"
@@ -48,7 +49,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("logging.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("logging.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("logging.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/logging/apiv2/metrics_client.go b/logging/apiv2/metrics_client.go
index 624d274..f9b82d7 100644
--- a/logging/apiv2/metrics_client.go
+++ b/logging/apiv2/metrics_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	loggingpb "google.golang.org/genproto/googleapis/logging/v2"
 	"google.golang.org/grpc"
@@ -47,7 +48,8 @@
 
 func defaultMetricsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("logging.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("logging.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("logging.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/logging/go.mod b/logging/go.mod
index 693fe29..e04c3d5 100644
--- a/logging/go.mod
+++ b/logging/go.mod
@@ -10,8 +10,8 @@
 	github.com/googleapis/gax-go/v2 v2.0.5
 	go.opencensus.io v0.22.5
 	golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43
-	golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6 // indirect
-	google.golang.org/api v0.33.0
-	google.golang.org/genproto v0.0.0-20201021134325-0d71844de594
+	golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 // indirect
+	google.golang.org/api v0.34.0
+	google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5
 	google.golang.org/grpc v1.32.0
 )
diff --git a/logging/go.sum b/logging/go.sum
index 35609e2..9ed0da5 100644
--- a/logging/go.sum
+++ b/logging/go.sum
@@ -269,6 +269,8 @@
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20201010224723-4f7140c49acb h1:mUVeFHoDKis5nxCAzoAi7E8Ghb86EXh/RK6wtvJIqRY=
 golang.org/x/net v0.0.0-20201010224723-4f7140c49acb/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974 h1:IX6qOQeG5uLjB/hjjwjedwfjND0hgjPMMyO1RoIXQNI=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45 h1:SVwTIAaPC2U/AvvLNZ2a7OVsmBpC8L5BlwK1whH3hm0=
@@ -291,6 +293,8 @@
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208 h1:qwRHBd0NqMbJxfbotnDhm2ByMI1Shq4Y6oRJo21SGJA=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9 h1:SQFwaSi55rU7vdNs9Yr0Z324VNlrF+0wMqRXT4St8ck=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -402,8 +406,8 @@
 golang.org/x/tools v0.0.0-20200904185747-39188db58858/go.mod h1:Cj7w3i3Rnn0Xh82ur9kSqwfTHTeVxaDqrfMjpcNT6bE=
 golang.org/x/tools v0.0.0-20201017001424-6003fad69a88 h1:ZB1XYzdDo7c/O48jzjMkvIjnC120Z9/CwgDWhePjQdQ=
 golang.org/x/tools v0.0.0-20201017001424-6003fad69a88/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6 h1:ov/kH02/RUWYnR/kPSTGM8hFzZglJT6cBNDXVDoxmJY=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 h1:rbvTkL9AkFts1cgI78+gG6Yu1pwaqX6hjSJAatB78E4=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -427,6 +431,8 @@
 google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc=
 google.golang.org/api v0.33.0 h1:+gL0XvACeMIvpwLZ5rQZzLn5cwOsgg8dIcfJ2SYfBVw=
 google.golang.org/api v0.33.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
+google.golang.org/api v0.34.0 h1:k40adF3uR+6x/+hO5Dh4ZFUqFp67vxvbpafFiJxl10A=
+google.golang.org/api v0.34.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
@@ -466,8 +472,8 @@
 google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154 h1:bFFRpT+e8JJVY7lMMfvezL1ZIwqiwmPl2bsE2yx4HqM=
 google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594 h1:JZWUHUjZJojCHxs9ZZLFsnRGKVBXBoOHGxeTSt6OE+Q=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5 h1:YejJbGvoWsTXHab4OKNrzk27Dr7s4lPLnewbHue1+gM=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
diff --git a/longrunning/autogen/doc.go b/longrunning/autogen/doc.go
index 6b27d85..adfcadf 100644
--- a/longrunning/autogen/doc.go
+++ b/longrunning/autogen/doc.go
@@ -48,7 +48,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/longrunning/autogen/operations_client.go b/longrunning/autogen/operations_client.go
index b361c78..28cdab4 100644
--- a/longrunning/autogen/operations_client.go
+++ b/longrunning/autogen/operations_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
 	"google.golang.org/grpc"
@@ -47,7 +48,8 @@
 
 func defaultOperationsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("longrunning.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("longrunning.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("longrunning.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/managedidentities/apiv1/doc.go b/managedidentities/apiv1/doc.go
index a77c30b..02d2e67 100644
--- a/managedidentities/apiv1/doc.go
+++ b/managedidentities/apiv1/doc.go
@@ -52,7 +52,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/managedidentities/apiv1/managed_identities_client.go b/managedidentities/apiv1/managed_identities_client.go
index 22c50ed..2d8bc03 100644
--- a/managedidentities/apiv1/managed_identities_client.go
+++ b/managedidentities/apiv1/managed_identities_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	managedidentitiespb "google.golang.org/genproto/googleapis/cloud/managedidentities/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -54,7 +55,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("managedidentities.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("managedidentities.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("managedidentities.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/memcache/apiv1beta2/cloud_memcache_client.go b/memcache/apiv1beta2/cloud_memcache_client.go
index b5088e4..e5c7302 100644
--- a/memcache/apiv1beta2/cloud_memcache_client.go
+++ b/memcache/apiv1beta2/cloud_memcache_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	memcachepb "google.golang.org/genproto/googleapis/cloud/memcache/v1beta2"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -51,7 +52,8 @@
 
 func defaultCloudMemcacheClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("memcache.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("memcache.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("memcache.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/memcache/apiv1beta2/doc.go b/memcache/apiv1beta2/doc.go
index 631002b..2f2c08e 100644
--- a/memcache/apiv1beta2/doc.go
+++ b/memcache/apiv1beta2/doc.go
@@ -51,7 +51,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/monitoring/apiv3/v2/alert_policy_client.go b/monitoring/apiv3/v2/alert_policy_client.go
index a79ed50..79713f3 100644
--- a/monitoring/apiv3/v2/alert_policy_client.go
+++ b/monitoring/apiv3/v2/alert_policy_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	monitoringpb "google.golang.org/genproto/googleapis/monitoring/v3"
 	"google.golang.org/grpc"
@@ -47,7 +48,8 @@
 
 func defaultAlertPolicyClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("monitoring.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("monitoring.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("monitoring.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/monitoring/apiv3/v2/doc.go b/monitoring/apiv3/v2/doc.go
index 330106a..db29752 100644
--- a/monitoring/apiv3/v2/doc.go
+++ b/monitoring/apiv3/v2/doc.go
@@ -53,7 +53,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/monitoring/apiv3/v2/group_client.go b/monitoring/apiv3/v2/group_client.go
index 2f263e7..d8fd4df 100644
--- a/monitoring/apiv3/v2/group_client.go
+++ b/monitoring/apiv3/v2/group_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	monitoredrespb "google.golang.org/genproto/googleapis/api/monitoredres"
 	monitoringpb "google.golang.org/genproto/googleapis/monitoring/v3"
@@ -49,7 +50,8 @@
 
 func defaultGroupClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("monitoring.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("monitoring.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("monitoring.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/monitoring/apiv3/v2/metric_client.go b/monitoring/apiv3/v2/metric_client.go
index 0d828cc..036c9c9 100644
--- a/monitoring/apiv3/v2/metric_client.go
+++ b/monitoring/apiv3/v2/metric_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	metricpb "google.golang.org/genproto/googleapis/api/metric"
 	monitoredrespb "google.golang.org/genproto/googleapis/api/monitoredres"
@@ -52,7 +53,8 @@
 
 func defaultMetricClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("monitoring.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("monitoring.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("monitoring.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/monitoring/apiv3/v2/notification_channel_client.go b/monitoring/apiv3/v2/notification_channel_client.go
index 3c16a6d..97b8c47 100644
--- a/monitoring/apiv3/v2/notification_channel_client.go
+++ b/monitoring/apiv3/v2/notification_channel_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	monitoringpb "google.golang.org/genproto/googleapis/monitoring/v3"
 	"google.golang.org/grpc"
@@ -52,7 +53,8 @@
 
 func defaultNotificationChannelClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("monitoring.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("monitoring.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("monitoring.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/monitoring/apiv3/v2/service_monitoring_client.go b/monitoring/apiv3/v2/service_monitoring_client.go
index f4ba401..73134cc 100644
--- a/monitoring/apiv3/v2/service_monitoring_client.go
+++ b/monitoring/apiv3/v2/service_monitoring_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	monitoringpb "google.golang.org/genproto/googleapis/monitoring/v3"
 	"google.golang.org/grpc"
@@ -52,7 +53,8 @@
 
 func defaultServiceMonitoringClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("monitoring.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("monitoring.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("monitoring.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/monitoring/apiv3/v2/uptime_check_client.go b/monitoring/apiv3/v2/uptime_check_client.go
index cd93602..0bdbc75 100644
--- a/monitoring/apiv3/v2/uptime_check_client.go
+++ b/monitoring/apiv3/v2/uptime_check_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	monitoringpb "google.golang.org/genproto/googleapis/monitoring/v3"
 	"google.golang.org/grpc"
@@ -48,7 +49,8 @@
 
 func defaultUptimeCheckClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("monitoring.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("monitoring.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("monitoring.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/monitoring/dashboard/apiv1/dashboards_client.go b/monitoring/dashboard/apiv1/dashboards_client.go
index 39efda1..33ce87d 100644
--- a/monitoring/dashboard/apiv1/dashboards_client.go
+++ b/monitoring/dashboard/apiv1/dashboards_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	dashboardpb "google.golang.org/genproto/googleapis/monitoring/dashboard/v1"
 	"google.golang.org/grpc"
@@ -47,7 +48,8 @@
 
 func defaultDashboardsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("monitoring.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("monitoring.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("monitoring.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/monitoring/dashboard/apiv1/doc.go b/monitoring/dashboard/apiv1/doc.go
index 7ee6ffa..d99b514 100644
--- a/monitoring/dashboard/apiv1/doc.go
+++ b/monitoring/dashboard/apiv1/doc.go
@@ -44,7 +44,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/notebooks/apiv1beta1/doc.go b/notebooks/apiv1beta1/doc.go
index 66e4787..21a2e5b 100644
--- a/notebooks/apiv1beta1/doc.go
+++ b/notebooks/apiv1beta1/doc.go
@@ -51,7 +51,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/notebooks/apiv1beta1/notebook_client.go b/notebooks/apiv1beta1/notebook_client.go
index ba126a4..1507b60 100644
--- a/notebooks/apiv1beta1/notebook_client.go
+++ b/notebooks/apiv1beta1/notebook_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	notebookspb "google.golang.org/genproto/googleapis/cloud/notebooks/v1beta1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -63,7 +64,8 @@
 
 func defaultNotebookClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("notebooks.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("notebooks.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("notebooks.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/osconfig/agentendpoint/apiv1/agent_endpoint_client.go b/osconfig/agentendpoint/apiv1/agent_endpoint_client.go
index 720faf5..fc57b15 100644
--- a/osconfig/agentendpoint/apiv1/agent_endpoint_client.go
+++ b/osconfig/agentendpoint/apiv1/agent_endpoint_client.go
@@ -23,6 +23,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	agentendpointpb "google.golang.org/genproto/googleapis/cloud/osconfig/agentendpoint/v1"
 	"google.golang.org/grpc"
@@ -44,7 +45,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("osconfig.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("osconfig.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("osconfig.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/osconfig/agentendpoint/apiv1/doc.go b/osconfig/agentendpoint/apiv1/doc.go
index 4379431..a3bcd99 100644
--- a/osconfig/agentendpoint/apiv1/doc.go
+++ b/osconfig/agentendpoint/apiv1/doc.go
@@ -49,7 +49,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/osconfig/agentendpoint/apiv1beta/agent_endpoint_client.go b/osconfig/agentendpoint/apiv1beta/agent_endpoint_client.go
index 3947db7..0337979 100644
--- a/osconfig/agentendpoint/apiv1beta/agent_endpoint_client.go
+++ b/osconfig/agentendpoint/apiv1beta/agent_endpoint_client.go
@@ -23,6 +23,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	agentendpointpb "google.golang.org/genproto/googleapis/cloud/osconfig/agentendpoint/v1beta"
 	"google.golang.org/grpc"
@@ -44,7 +45,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("osconfig.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("osconfig.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("osconfig.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/osconfig/agentendpoint/apiv1beta/doc.go b/osconfig/agentendpoint/apiv1beta/doc.go
index 5a9c483..46e6944 100644
--- a/osconfig/agentendpoint/apiv1beta/doc.go
+++ b/osconfig/agentendpoint/apiv1beta/doc.go
@@ -51,7 +51,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/osconfig/apiv1/doc.go b/osconfig/apiv1/doc.go
index a7755f1..7385111 100644
--- a/osconfig/apiv1/doc.go
+++ b/osconfig/apiv1/doc.go
@@ -49,7 +49,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/osconfig/apiv1/os_config_client.go b/osconfig/apiv1/os_config_client.go
index 2358709..7daf16b 100644
--- a/osconfig/apiv1/os_config_client.go
+++ b/osconfig/apiv1/os_config_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	osconfigpb "google.golang.org/genproto/googleapis/cloud/osconfig/v1"
 	"google.golang.org/grpc"
@@ -51,7 +52,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("osconfig.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("osconfig.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("osconfig.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/osconfig/apiv1beta/doc.go b/osconfig/apiv1beta/doc.go
index adc1aef..17597a9 100644
--- a/osconfig/apiv1beta/doc.go
+++ b/osconfig/apiv1beta/doc.go
@@ -51,7 +51,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/osconfig/apiv1beta/os_config_client.go b/osconfig/apiv1beta/os_config_client.go
index 55dbb59..58b1e26 100644
--- a/osconfig/apiv1beta/os_config_client.go
+++ b/osconfig/apiv1beta/os_config_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	osconfigpb "google.golang.org/genproto/googleapis/cloud/osconfig/v1beta"
 	"google.golang.org/grpc"
@@ -57,7 +58,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("osconfig.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("osconfig.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("osconfig.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/oslogin/apiv1/doc.go b/oslogin/apiv1/doc.go
index 94ef478..ce84544 100644
--- a/oslogin/apiv1/doc.go
+++ b/oslogin/apiv1/doc.go
@@ -49,7 +49,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/oslogin/apiv1/os_login_client.go b/oslogin/apiv1/os_login_client.go
index dbd14af..7c66553 100644
--- a/oslogin/apiv1/os_login_client.go
+++ b/oslogin/apiv1/os_login_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	commonpb "google.golang.org/genproto/googleapis/cloud/oslogin/common"
 	osloginpb "google.golang.org/genproto/googleapis/cloud/oslogin/v1"
@@ -47,7 +48,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("oslogin.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("oslogin.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("oslogin.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/oslogin/apiv1beta/doc.go b/oslogin/apiv1beta/doc.go
index 147e3b8..f258515 100644
--- a/oslogin/apiv1beta/doc.go
+++ b/oslogin/apiv1beta/doc.go
@@ -51,7 +51,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/oslogin/apiv1beta/os_login_client.go b/oslogin/apiv1beta/os_login_client.go
index 0d6e48e..a7f95c9 100644
--- a/oslogin/apiv1beta/os_login_client.go
+++ b/oslogin/apiv1beta/os_login_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	commonpb "google.golang.org/genproto/googleapis/cloud/oslogin/common"
 	osloginpb "google.golang.org/genproto/googleapis/cloud/oslogin/v1beta"
@@ -47,7 +48,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("oslogin.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("oslogin.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("oslogin.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/phishingprotection/apiv1beta1/doc.go b/phishingprotection/apiv1beta1/doc.go
index a722971..c2c99b6 100644
--- a/phishingprotection/apiv1beta1/doc.go
+++ b/phishingprotection/apiv1beta1/doc.go
@@ -48,7 +48,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/phishingprotection/apiv1beta1/phishing_protection_service_v1_beta1_client.go b/phishingprotection/apiv1beta1/phishing_protection_service_v1_beta1_client.go
index cbf31ed..abda33a 100644
--- a/phishingprotection/apiv1beta1/phishing_protection_service_v1_beta1_client.go
+++ b/phishingprotection/apiv1beta1/phishing_protection_service_v1_beta1_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	phishingprotectionpb "google.golang.org/genproto/googleapis/cloud/phishingprotection/v1beta1"
 	"google.golang.org/grpc"
@@ -40,7 +41,8 @@
 
 func defaultPhishingProtectionServiceV1Beta1ClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("phishingprotection.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("phishingprotection.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("phishingprotection.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/policytroubleshooter/apiv1/doc.go b/policytroubleshooter/apiv1/doc.go
index 6bfd501..e3d7074 100644
--- a/policytroubleshooter/apiv1/doc.go
+++ b/policytroubleshooter/apiv1/doc.go
@@ -46,7 +46,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/policytroubleshooter/apiv1/iam_checker_client.go b/policytroubleshooter/apiv1/iam_checker_client.go
index bbd08d2..3e614b0 100644
--- a/policytroubleshooter/apiv1/iam_checker_client.go
+++ b/policytroubleshooter/apiv1/iam_checker_client.go
@@ -23,6 +23,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	policytroubleshooterpb "google.golang.org/genproto/googleapis/cloud/policytroubleshooter/v1"
 	"google.golang.org/grpc"
@@ -38,7 +39,8 @@
 
 func defaultIamCheckerClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("policytroubleshooter.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("policytroubleshooter.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("policytroubleshooter.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/pubsub/apiv1/doc.go b/pubsub/apiv1/doc.go
index 2f67bcc..cbc09fa 100644
--- a/pubsub/apiv1/doc.go
+++ b/pubsub/apiv1/doc.go
@@ -49,7 +49,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/pubsub/apiv1/publisher_client.go b/pubsub/apiv1/publisher_client.go
index d4f5303..25f9897 100644
--- a/pubsub/apiv1/publisher_client.go
+++ b/pubsub/apiv1/publisher_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	pubsubpb "google.golang.org/genproto/googleapis/pubsub/v1"
 	"google.golang.org/grpc"
@@ -51,7 +52,8 @@
 
 func defaultPublisherClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("pubsub.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("pubsub.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("pubsub.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/pubsub/apiv1/subscriber_client.go b/pubsub/apiv1/subscriber_client.go
index 62aa405..f0b3ae4 100644
--- a/pubsub/apiv1/subscriber_client.go
+++ b/pubsub/apiv1/subscriber_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	pubsubpb "google.golang.org/genproto/googleapis/pubsub/v1"
 	"google.golang.org/grpc"
@@ -58,7 +59,8 @@
 
 func defaultSubscriberClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("pubsub.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("pubsub.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("pubsub.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/pubsub/go.mod b/pubsub/go.mod
index d3d665f..448898e 100644
--- a/pubsub/go.mod
+++ b/pubsub/go.mod
@@ -9,10 +9,10 @@
 	github.com/googleapis/gax-go/v2 v2.0.5
 	go.opencensus.io v0.22.5
 	golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43
-	golang.org/x/sync v0.0.0-20201008141435-b3e1573b7520
+	golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9
 	golang.org/x/time v0.0.0-20200630173020-3af7569d3a1e
-	golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6 // indirect
-	google.golang.org/api v0.33.0
-	google.golang.org/genproto v0.0.0-20201021134325-0d71844de594
+	golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 // indirect
+	google.golang.org/api v0.34.0
+	google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5
 	google.golang.org/grpc v1.32.0
 )
diff --git a/pubsub/go.sum b/pubsub/go.sum
index 33fc8cf..875174a 100644
--- a/pubsub/go.sum
+++ b/pubsub/go.sum
@@ -222,6 +222,8 @@
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20201010224723-4f7140c49acb h1:mUVeFHoDKis5nxCAzoAi7E8Ghb86EXh/RK6wtvJIqRY=
 golang.org/x/net v0.0.0-20201010224723-4f7140c49acb/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974 h1:IX6qOQeG5uLjB/hjjwjedwfjND0hgjPMMyO1RoIXQNI=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -241,8 +243,8 @@
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208 h1:qwRHBd0NqMbJxfbotnDhm2ByMI1Shq4Y6oRJo21SGJA=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20201008141435-b3e1573b7520 h1:Bx6FllMpG4NWDOfhMBz1VR2QYNp/SAOHPIAsaVmxfPo=
-golang.org/x/sync v0.0.0-20201008141435-b3e1573b7520/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9 h1:SQFwaSi55rU7vdNs9Yr0Z324VNlrF+0wMqRXT4St8ck=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -338,8 +340,8 @@
 golang.org/x/tools v0.0.0-20200904185747-39188db58858/go.mod h1:Cj7w3i3Rnn0Xh82ur9kSqwfTHTeVxaDqrfMjpcNT6bE=
 golang.org/x/tools v0.0.0-20201017001424-6003fad69a88 h1:ZB1XYzdDo7c/O48jzjMkvIjnC120Z9/CwgDWhePjQdQ=
 golang.org/x/tools v0.0.0-20201017001424-6003fad69a88/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6 h1:ov/kH02/RUWYnR/kPSTGM8hFzZglJT6cBNDXVDoxmJY=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 h1:rbvTkL9AkFts1cgI78+gG6Yu1pwaqX6hjSJAatB78E4=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -363,6 +365,8 @@
 google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc=
 google.golang.org/api v0.33.0 h1:+gL0XvACeMIvpwLZ5rQZzLn5cwOsgg8dIcfJ2SYfBVw=
 google.golang.org/api v0.33.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
+google.golang.org/api v0.34.0 h1:k40adF3uR+6x/+hO5Dh4ZFUqFp67vxvbpafFiJxl10A=
+google.golang.org/api v0.34.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
@@ -402,8 +406,8 @@
 google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154 h1:bFFRpT+e8JJVY7lMMfvezL1ZIwqiwmPl2bsE2yx4HqM=
 google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594 h1:JZWUHUjZJojCHxs9ZZLFsnRGKVBXBoOHGxeTSt6OE+Q=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5 h1:YejJbGvoWsTXHab4OKNrzk27Dr7s4lPLnewbHue1+gM=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
diff --git a/pubsublite/apiv1/admin_client.go b/pubsublite/apiv1/admin_client.go
index 2efe392..5d01504 100644
--- a/pubsublite/apiv1/admin_client.go
+++ b/pubsublite/apiv1/admin_client.go
@@ -21,14 +21,17 @@
 	"fmt"
 	"math"
 	"net/url"
+	"time"
 
 	"github.com/golang/protobuf/proto"
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	pubsublitepb "google.golang.org/genproto/googleapis/cloud/pubsublite/v1"
 	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/metadata"
 )
 
@@ -52,7 +55,8 @@
 
 func defaultAdminClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("pubsublite.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("pubsublite.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("pubsublite.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
@@ -62,18 +66,186 @@
 
 func defaultAdminCallOptions() *AdminCallOptions {
 	return &AdminCallOptions{
-		CreateTopic:            []gax.CallOption{},
-		GetTopic:               []gax.CallOption{},
-		GetTopicPartitions:     []gax.CallOption{},
-		ListTopics:             []gax.CallOption{},
-		UpdateTopic:            []gax.CallOption{},
-		DeleteTopic:            []gax.CallOption{},
-		ListTopicSubscriptions: []gax.CallOption{},
-		CreateSubscription:     []gax.CallOption{},
-		GetSubscription:        []gax.CallOption{},
-		ListSubscriptions:      []gax.CallOption{},
-		UpdateSubscription:     []gax.CallOption{},
-		DeleteSubscription:     []gax.CallOption{},
+		CreateTopic: []gax.CallOption{
+			gax.WithRetry(func() gax.Retryer {
+				return gax.OnCodes([]codes.Code{
+					codes.DeadlineExceeded,
+					codes.Unavailable,
+					codes.Aborted,
+					codes.Internal,
+					codes.Unknown,
+				}, gax.Backoff{
+					Initial:    100 * time.Millisecond,
+					Max:        60000 * time.Millisecond,
+					Multiplier: 1.30,
+				})
+			}),
+		},
+		GetTopic: []gax.CallOption{
+			gax.WithRetry(func() gax.Retryer {
+				return gax.OnCodes([]codes.Code{
+					codes.DeadlineExceeded,
+					codes.Unavailable,
+					codes.Aborted,
+					codes.Internal,
+					codes.Unknown,
+				}, gax.Backoff{
+					Initial:    100 * time.Millisecond,
+					Max:        60000 * time.Millisecond,
+					Multiplier: 1.30,
+				})
+			}),
+		},
+		GetTopicPartitions: []gax.CallOption{
+			gax.WithRetry(func() gax.Retryer {
+				return gax.OnCodes([]codes.Code{
+					codes.DeadlineExceeded,
+					codes.Unavailable,
+					codes.Aborted,
+					codes.Internal,
+					codes.Unknown,
+				}, gax.Backoff{
+					Initial:    100 * time.Millisecond,
+					Max:        60000 * time.Millisecond,
+					Multiplier: 1.30,
+				})
+			}),
+		},
+		ListTopics: []gax.CallOption{
+			gax.WithRetry(func() gax.Retryer {
+				return gax.OnCodes([]codes.Code{
+					codes.DeadlineExceeded,
+					codes.Unavailable,
+					codes.Aborted,
+					codes.Internal,
+					codes.Unknown,
+				}, gax.Backoff{
+					Initial:    100 * time.Millisecond,
+					Max:        60000 * time.Millisecond,
+					Multiplier: 1.30,
+				})
+			}),
+		},
+		UpdateTopic: []gax.CallOption{
+			gax.WithRetry(func() gax.Retryer {
+				return gax.OnCodes([]codes.Code{
+					codes.DeadlineExceeded,
+					codes.Unavailable,
+					codes.Aborted,
+					codes.Internal,
+					codes.Unknown,
+				}, gax.Backoff{
+					Initial:    100 * time.Millisecond,
+					Max:        60000 * time.Millisecond,
+					Multiplier: 1.30,
+				})
+			}),
+		},
+		DeleteTopic: []gax.CallOption{
+			gax.WithRetry(func() gax.Retryer {
+				return gax.OnCodes([]codes.Code{
+					codes.DeadlineExceeded,
+					codes.Unavailable,
+					codes.Aborted,
+					codes.Internal,
+					codes.Unknown,
+				}, gax.Backoff{
+					Initial:    100 * time.Millisecond,
+					Max:        60000 * time.Millisecond,
+					Multiplier: 1.30,
+				})
+			}),
+		},
+		ListTopicSubscriptions: []gax.CallOption{
+			gax.WithRetry(func() gax.Retryer {
+				return gax.OnCodes([]codes.Code{
+					codes.DeadlineExceeded,
+					codes.Unavailable,
+					codes.Aborted,
+					codes.Internal,
+					codes.Unknown,
+				}, gax.Backoff{
+					Initial:    100 * time.Millisecond,
+					Max:        60000 * time.Millisecond,
+					Multiplier: 1.30,
+				})
+			}),
+		},
+		CreateSubscription: []gax.CallOption{
+			gax.WithRetry(func() gax.Retryer {
+				return gax.OnCodes([]codes.Code{
+					codes.DeadlineExceeded,
+					codes.Unavailable,
+					codes.Aborted,
+					codes.Internal,
+					codes.Unknown,
+				}, gax.Backoff{
+					Initial:    100 * time.Millisecond,
+					Max:        60000 * time.Millisecond,
+					Multiplier: 1.30,
+				})
+			}),
+		},
+		GetSubscription: []gax.CallOption{
+			gax.WithRetry(func() gax.Retryer {
+				return gax.OnCodes([]codes.Code{
+					codes.DeadlineExceeded,
+					codes.Unavailable,
+					codes.Aborted,
+					codes.Internal,
+					codes.Unknown,
+				}, gax.Backoff{
+					Initial:    100 * time.Millisecond,
+					Max:        60000 * time.Millisecond,
+					Multiplier: 1.30,
+				})
+			}),
+		},
+		ListSubscriptions: []gax.CallOption{
+			gax.WithRetry(func() gax.Retryer {
+				return gax.OnCodes([]codes.Code{
+					codes.DeadlineExceeded,
+					codes.Unavailable,
+					codes.Aborted,
+					codes.Internal,
+					codes.Unknown,
+				}, gax.Backoff{
+					Initial:    100 * time.Millisecond,
+					Max:        60000 * time.Millisecond,
+					Multiplier: 1.30,
+				})
+			}),
+		},
+		UpdateSubscription: []gax.CallOption{
+			gax.WithRetry(func() gax.Retryer {
+				return gax.OnCodes([]codes.Code{
+					codes.DeadlineExceeded,
+					codes.Unavailable,
+					codes.Aborted,
+					codes.Internal,
+					codes.Unknown,
+				}, gax.Backoff{
+					Initial:    100 * time.Millisecond,
+					Max:        60000 * time.Millisecond,
+					Multiplier: 1.30,
+				})
+			}),
+		},
+		DeleteSubscription: []gax.CallOption{
+			gax.WithRetry(func() gax.Retryer {
+				return gax.OnCodes([]codes.Code{
+					codes.DeadlineExceeded,
+					codes.Unavailable,
+					codes.Aborted,
+					codes.Internal,
+					codes.Unknown,
+				}, gax.Backoff{
+					Initial:    100 * time.Millisecond,
+					Max:        60000 * time.Millisecond,
+					Multiplier: 1.30,
+				})
+			}),
+		},
 	}
 }
 
@@ -157,6 +329,11 @@
 
 // CreateTopic creates a new topic.
 func (c *AdminClient) CreateTopic(ctx context.Context, req *pubsublitepb.CreateTopicRequest, opts ...gax.CallOption) (*pubsublitepb.Topic, error) {
+	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
+		cctx, cancel := context.WithTimeout(ctx, 600000*time.Millisecond)
+		defer cancel()
+		ctx = cctx
+	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append(c.CallOptions.CreateTopic[0:len(c.CallOptions.CreateTopic):len(c.CallOptions.CreateTopic)], opts...)
@@ -174,6 +351,11 @@
 
 // GetTopic returns the topic configuration.
 func (c *AdminClient) GetTopic(ctx context.Context, req *pubsublitepb.GetTopicRequest, opts ...gax.CallOption) (*pubsublitepb.Topic, error) {
+	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
+		cctx, cancel := context.WithTimeout(ctx, 600000*time.Millisecond)
+		defer cancel()
+		ctx = cctx
+	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append(c.CallOptions.GetTopic[0:len(c.CallOptions.GetTopic):len(c.CallOptions.GetTopic)], opts...)
@@ -191,6 +373,11 @@
 
 // GetTopicPartitions returns the partition information for the requested topic.
 func (c *AdminClient) GetTopicPartitions(ctx context.Context, req *pubsublitepb.GetTopicPartitionsRequest, opts ...gax.CallOption) (*pubsublitepb.TopicPartitions, error) {
+	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
+		cctx, cancel := context.WithTimeout(ctx, 600000*time.Millisecond)
+		defer cancel()
+		ctx = cctx
+	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append(c.CallOptions.GetTopicPartitions[0:len(c.CallOptions.GetTopicPartitions):len(c.CallOptions.GetTopicPartitions)], opts...)
@@ -249,6 +436,11 @@
 
 // UpdateTopic updates properties of the specified topic.
 func (c *AdminClient) UpdateTopic(ctx context.Context, req *pubsublitepb.UpdateTopicRequest, opts ...gax.CallOption) (*pubsublitepb.Topic, error) {
+	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
+		cctx, cancel := context.WithTimeout(ctx, 600000*time.Millisecond)
+		defer cancel()
+		ctx = cctx
+	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "topic.name", url.QueryEscape(req.GetTopic().GetName())))
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append(c.CallOptions.UpdateTopic[0:len(c.CallOptions.UpdateTopic):len(c.CallOptions.UpdateTopic)], opts...)
@@ -266,6 +458,11 @@
 
 // DeleteTopic deletes the specified topic.
 func (c *AdminClient) DeleteTopic(ctx context.Context, req *pubsublitepb.DeleteTopicRequest, opts ...gax.CallOption) error {
+	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
+		cctx, cancel := context.WithTimeout(ctx, 600000*time.Millisecond)
+		defer cancel()
+		ctx = cctx
+	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append(c.CallOptions.DeleteTopic[0:len(c.CallOptions.DeleteTopic):len(c.CallOptions.DeleteTopic)], opts...)
@@ -320,6 +517,11 @@
 
 // CreateSubscription creates a new subscription.
 func (c *AdminClient) CreateSubscription(ctx context.Context, req *pubsublitepb.CreateSubscriptionRequest, opts ...gax.CallOption) (*pubsublitepb.Subscription, error) {
+	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
+		cctx, cancel := context.WithTimeout(ctx, 600000*time.Millisecond)
+		defer cancel()
+		ctx = cctx
+	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append(c.CallOptions.CreateSubscription[0:len(c.CallOptions.CreateSubscription):len(c.CallOptions.CreateSubscription)], opts...)
@@ -337,6 +539,11 @@
 
 // GetSubscription returns the subscription configuration.
 func (c *AdminClient) GetSubscription(ctx context.Context, req *pubsublitepb.GetSubscriptionRequest, opts ...gax.CallOption) (*pubsublitepb.Subscription, error) {
+	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
+		cctx, cancel := context.WithTimeout(ctx, 600000*time.Millisecond)
+		defer cancel()
+		ctx = cctx
+	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append(c.CallOptions.GetSubscription[0:len(c.CallOptions.GetSubscription):len(c.CallOptions.GetSubscription)], opts...)
@@ -395,6 +602,11 @@
 
 // UpdateSubscription updates properties of the specified subscription.
 func (c *AdminClient) UpdateSubscription(ctx context.Context, req *pubsublitepb.UpdateSubscriptionRequest, opts ...gax.CallOption) (*pubsublitepb.Subscription, error) {
+	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
+		cctx, cancel := context.WithTimeout(ctx, 600000*time.Millisecond)
+		defer cancel()
+		ctx = cctx
+	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "subscription.name", url.QueryEscape(req.GetSubscription().GetName())))
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append(c.CallOptions.UpdateSubscription[0:len(c.CallOptions.UpdateSubscription):len(c.CallOptions.UpdateSubscription)], opts...)
@@ -412,6 +624,11 @@
 
 // DeleteSubscription deletes the specified subscription.
 func (c *AdminClient) DeleteSubscription(ctx context.Context, req *pubsublitepb.DeleteSubscriptionRequest, opts ...gax.CallOption) error {
+	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
+		cctx, cancel := context.WithTimeout(ctx, 600000*time.Millisecond)
+		defer cancel()
+		ctx = cctx
+	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append(c.CallOptions.DeleteSubscription[0:len(c.CallOptions.DeleteSubscription):len(c.CallOptions.DeleteSubscription)], opts...)
diff --git a/pubsublite/apiv1/cursor_client.go b/pubsublite/apiv1/cursor_client.go
index 1c58d02..31c5dee 100644
--- a/pubsublite/apiv1/cursor_client.go
+++ b/pubsublite/apiv1/cursor_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	pubsublitepb "google.golang.org/genproto/googleapis/cloud/pubsublite/v1"
 	"google.golang.org/grpc"
@@ -45,7 +46,8 @@
 
 func defaultCursorClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("pubsublite.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("pubsublite.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("pubsublite.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
@@ -61,6 +63,9 @@
 				return gax.OnCodes([]codes.Code{
 					codes.DeadlineExceeded,
 					codes.Unavailable,
+					codes.Aborted,
+					codes.Internal,
+					codes.Unknown,
 				}, gax.Backoff{
 					Initial:    100 * time.Millisecond,
 					Max:        60000 * time.Millisecond,
@@ -73,6 +78,9 @@
 				return gax.OnCodes([]codes.Code{
 					codes.DeadlineExceeded,
 					codes.Unavailable,
+					codes.Aborted,
+					codes.Internal,
+					codes.Unknown,
 				}, gax.Backoff{
 					Initial:    100 * time.Millisecond,
 					Max:        60000 * time.Millisecond,
diff --git a/pubsublite/apiv1/doc.go b/pubsublite/apiv1/doc.go
index 690c312..b929e46 100644
--- a/pubsublite/apiv1/doc.go
+++ b/pubsublite/apiv1/doc.go
@@ -44,7 +44,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/pubsublite/apiv1/partition_assignment_client.go b/pubsublite/apiv1/partition_assignment_client.go
index 74b7295..a2dfc73 100644
--- a/pubsublite/apiv1/partition_assignment_client.go
+++ b/pubsublite/apiv1/partition_assignment_client.go
@@ -22,6 +22,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	pubsublitepb "google.golang.org/genproto/googleapis/cloud/pubsublite/v1"
 	"google.golang.org/grpc"
@@ -37,7 +38,8 @@
 
 func defaultPartitionAssignmentClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("pubsublite.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("pubsublite.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("pubsublite.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/pubsublite/apiv1/publisher_client.go b/pubsublite/apiv1/publisher_client.go
index e73214f..1f4829f 100644
--- a/pubsublite/apiv1/publisher_client.go
+++ b/pubsublite/apiv1/publisher_client.go
@@ -22,6 +22,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	pubsublitepb "google.golang.org/genproto/googleapis/cloud/pubsublite/v1"
 	"google.golang.org/grpc"
@@ -37,7 +38,8 @@
 
 func defaultPublisherClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("pubsublite.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("pubsublite.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("pubsublite.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/pubsublite/apiv1/subscriber_client.go b/pubsublite/apiv1/subscriber_client.go
index bd581b4..471fa94 100644
--- a/pubsublite/apiv1/subscriber_client.go
+++ b/pubsublite/apiv1/subscriber_client.go
@@ -22,6 +22,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	pubsublitepb "google.golang.org/genproto/googleapis/cloud/pubsublite/v1"
 	"google.golang.org/grpc"
@@ -37,7 +38,8 @@
 
 func defaultSubscriberClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("pubsublite.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("pubsublite.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("pubsublite.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/pubsublite/apiv1/topic_stats_client.go b/pubsublite/apiv1/topic_stats_client.go
index 1ad0477..c0b5298 100644
--- a/pubsublite/apiv1/topic_stats_client.go
+++ b/pubsublite/apiv1/topic_stats_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	pubsublitepb "google.golang.org/genproto/googleapis/cloud/pubsublite/v1"
 	"google.golang.org/grpc"
@@ -41,7 +42,8 @@
 
 func defaultTopicStatsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("pubsublite.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("pubsublite.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("pubsublite.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
@@ -56,6 +58,9 @@
 				return gax.OnCodes([]codes.Code{
 					codes.DeadlineExceeded,
 					codes.Unavailable,
+					codes.Aborted,
+					codes.Internal,
+					codes.Unknown,
 				}, gax.Backoff{
 					Initial:    100 * time.Millisecond,
 					Max:        60000 * time.Millisecond,
diff --git a/pubsublite/go.mod b/pubsublite/go.mod
index 0b58f48..cc8e74d 100644
--- a/pubsublite/go.mod
+++ b/pubsublite/go.mod
@@ -6,8 +6,8 @@
 	cloud.google.com/go v0.70.0
 	github.com/golang/protobuf v1.4.3
 	github.com/googleapis/gax-go/v2 v2.0.5
-	golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6 // indirect
-	google.golang.org/api v0.33.0
-	google.golang.org/genproto v0.0.0-20201021134325-0d71844de594
+	golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 // indirect
+	google.golang.org/api v0.34.0
+	google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5
 	google.golang.org/grpc v1.33.0
 )
diff --git a/pubsublite/go.sum b/pubsublite/go.sum
index 9099025..0e5ccfa 100644
--- a/pubsublite/go.sum
+++ b/pubsublite/go.sum
@@ -196,6 +196,8 @@
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20201010224723-4f7140c49acb h1:mUVeFHoDKis5nxCAzoAi7E8Ghb86EXh/RK6wtvJIqRY=
 golang.org/x/net v0.0.0-20201010224723-4f7140c49acb/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974 h1:IX6qOQeG5uLjB/hjjwjedwfjND0hgjPMMyO1RoIXQNI=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -211,6 +213,7 @@
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -292,8 +295,8 @@
 golang.org/x/tools v0.0.0-20200904185747-39188db58858/go.mod h1:Cj7w3i3Rnn0Xh82ur9kSqwfTHTeVxaDqrfMjpcNT6bE=
 golang.org/x/tools v0.0.0-20201017001424-6003fad69a88 h1:ZB1XYzdDo7c/O48jzjMkvIjnC120Z9/CwgDWhePjQdQ=
 golang.org/x/tools v0.0.0-20201017001424-6003fad69a88/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6 h1:ov/kH02/RUWYnR/kPSTGM8hFzZglJT6cBNDXVDoxmJY=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 h1:rbvTkL9AkFts1cgI78+gG6Yu1pwaqX6hjSJAatB78E4=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -317,6 +320,8 @@
 google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc=
 google.golang.org/api v0.33.0 h1:+gL0XvACeMIvpwLZ5rQZzLn5cwOsgg8dIcfJ2SYfBVw=
 google.golang.org/api v0.33.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
+google.golang.org/api v0.34.0 h1:k40adF3uR+6x/+hO5Dh4ZFUqFp67vxvbpafFiJxl10A=
+google.golang.org/api v0.34.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
@@ -356,8 +361,8 @@
 google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154 h1:bFFRpT+e8JJVY7lMMfvezL1ZIwqiwmPl2bsE2yx4HqM=
 google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594 h1:JZWUHUjZJojCHxs9ZZLFsnRGKVBXBoOHGxeTSt6OE+Q=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5 h1:YejJbGvoWsTXHab4OKNrzk27Dr7s4lPLnewbHue1+gM=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
diff --git a/recaptchaenterprise/apiv1/doc.go b/recaptchaenterprise/apiv1/doc.go
index 160d3c8..16b1141 100644
--- a/recaptchaenterprise/apiv1/doc.go
+++ b/recaptchaenterprise/apiv1/doc.go
@@ -46,7 +46,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/recaptchaenterprise/apiv1/recaptcha_enterprise_client.go b/recaptchaenterprise/apiv1/recaptcha_enterprise_client.go
index e2868aa..b947b25 100644
--- a/recaptchaenterprise/apiv1/recaptcha_enterprise_client.go
+++ b/recaptchaenterprise/apiv1/recaptcha_enterprise_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	recaptchaenterprisepb "google.golang.org/genproto/googleapis/cloud/recaptchaenterprise/v1"
 	"google.golang.org/grpc"
@@ -48,7 +49,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("recaptchaenterprise.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("recaptchaenterprise.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("recaptchaenterprise.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/recaptchaenterprise/apiv1beta1/doc.go b/recaptchaenterprise/apiv1beta1/doc.go
index dcd5d45..b00abf1 100644
--- a/recaptchaenterprise/apiv1beta1/doc.go
+++ b/recaptchaenterprise/apiv1beta1/doc.go
@@ -48,7 +48,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/recaptchaenterprise/apiv1beta1/recaptcha_enterprise_service_v1_beta1_client.go b/recaptchaenterprise/apiv1beta1/recaptcha_enterprise_service_v1_beta1_client.go
index 19e3751..8fb4ce9 100644
--- a/recaptchaenterprise/apiv1beta1/recaptcha_enterprise_service_v1_beta1_client.go
+++ b/recaptchaenterprise/apiv1beta1/recaptcha_enterprise_service_v1_beta1_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	recaptchaenterprisepb "google.golang.org/genproto/googleapis/cloud/recaptchaenterprise/v1beta1"
 	"google.golang.org/grpc"
@@ -48,7 +49,8 @@
 
 func defaultRecaptchaEnterpriseServiceV1Beta1ClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("recaptchaenterprise.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("recaptchaenterprise.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("recaptchaenterprise.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/recommender/apiv1/doc.go b/recommender/apiv1/doc.go
index 033ed3c..d85d9c8 100644
--- a/recommender/apiv1/doc.go
+++ b/recommender/apiv1/doc.go
@@ -46,7 +46,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/recommender/apiv1/recommender_client.go b/recommender/apiv1/recommender_client.go
index a204cd5..ee6ec1c 100644
--- a/recommender/apiv1/recommender_client.go
+++ b/recommender/apiv1/recommender_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	recommenderpb "google.golang.org/genproto/googleapis/cloud/recommender/v1"
 	"google.golang.org/grpc"
@@ -50,7 +51,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("recommender.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("recommender.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("recommender.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/recommender/apiv1beta1/doc.go b/recommender/apiv1beta1/doc.go
index bd1a437..ff48c5a 100644
--- a/recommender/apiv1beta1/doc.go
+++ b/recommender/apiv1beta1/doc.go
@@ -48,7 +48,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/recommender/apiv1beta1/recommender_client.go b/recommender/apiv1beta1/recommender_client.go
index 76663aa..9090f71 100644
--- a/recommender/apiv1beta1/recommender_client.go
+++ b/recommender/apiv1beta1/recommender_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	recommenderpb "google.golang.org/genproto/googleapis/cloud/recommender/v1beta1"
 	"google.golang.org/grpc"
@@ -50,7 +51,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("recommender.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("recommender.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("recommender.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/redis/apiv1/cloud_redis_client.go b/redis/apiv1/cloud_redis_client.go
index 7a341f7..70f87a3 100644
--- a/redis/apiv1/cloud_redis_client.go
+++ b/redis/apiv1/cloud_redis_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	redispb "google.golang.org/genproto/googleapis/cloud/redis/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -53,7 +54,8 @@
 
 func defaultCloudRedisClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("redis.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("redis.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("redis.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/redis/apiv1/doc.go b/redis/apiv1/doc.go
index 78c42e5..4f9b1bc 100644
--- a/redis/apiv1/doc.go
+++ b/redis/apiv1/doc.go
@@ -48,7 +48,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/redis/apiv1beta1/cloud_redis_client.go b/redis/apiv1beta1/cloud_redis_client.go
index 3aa5aa7..a1cfc53 100644
--- a/redis/apiv1beta1/cloud_redis_client.go
+++ b/redis/apiv1beta1/cloud_redis_client.go
@@ -30,6 +30,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	redispb "google.golang.org/genproto/googleapis/cloud/redis/v1beta1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -54,7 +55,8 @@
 
 func defaultCloudRedisClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("redis.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("redis.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("redis.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/redis/apiv1beta1/doc.go b/redis/apiv1beta1/doc.go
index 578f98b..7b8388e 100644
--- a/redis/apiv1beta1/doc.go
+++ b/redis/apiv1beta1/doc.go
@@ -50,7 +50,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/scheduler/apiv1/cloud_scheduler_client.go b/scheduler/apiv1/cloud_scheduler_client.go
index 24fa2e8..462bd73 100644
--- a/scheduler/apiv1/cloud_scheduler_client.go
+++ b/scheduler/apiv1/cloud_scheduler_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	schedulerpb "google.golang.org/genproto/googleapis/cloud/scheduler/v1"
 	"google.golang.org/grpc"
@@ -50,7 +51,8 @@
 
 func defaultCloudSchedulerClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("cloudscheduler.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("cloudscheduler.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("cloudscheduler.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/scheduler/apiv1/doc.go b/scheduler/apiv1/doc.go
index b72799b..bd19d00 100644
--- a/scheduler/apiv1/doc.go
+++ b/scheduler/apiv1/doc.go
@@ -48,7 +48,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/scheduler/apiv1beta1/cloud_scheduler_client.go b/scheduler/apiv1beta1/cloud_scheduler_client.go
index 7f70573..12b23db 100644
--- a/scheduler/apiv1beta1/cloud_scheduler_client.go
+++ b/scheduler/apiv1beta1/cloud_scheduler_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	schedulerpb "google.golang.org/genproto/googleapis/cloud/scheduler/v1beta1"
 	"google.golang.org/grpc"
@@ -50,7 +51,8 @@
 
 func defaultCloudSchedulerClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("cloudscheduler.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("cloudscheduler.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("cloudscheduler.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/scheduler/apiv1beta1/doc.go b/scheduler/apiv1beta1/doc.go
index c0ba9b3..feec80b 100644
--- a/scheduler/apiv1beta1/doc.go
+++ b/scheduler/apiv1beta1/doc.go
@@ -50,7 +50,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/secretmanager/apiv1/doc.go b/secretmanager/apiv1/doc.go
index 858e1a6..f76a1d6 100644
--- a/secretmanager/apiv1/doc.go
+++ b/secretmanager/apiv1/doc.go
@@ -49,7 +49,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/secretmanager/apiv1/secret_manager_client.go b/secretmanager/apiv1/secret_manager_client.go
index b7b9a20..95c1547 100644
--- a/secretmanager/apiv1/secret_manager_client.go
+++ b/secretmanager/apiv1/secret_manager_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	secretmanagerpb "google.golang.org/genproto/googleapis/cloud/secretmanager/v1"
 	iampb "google.golang.org/genproto/googleapis/iam/v1"
@@ -58,7 +59,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("secretmanager.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("secretmanager.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("secretmanager.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/secretmanager/apiv1beta1/doc.go b/secretmanager/apiv1beta1/doc.go
index c3c0014..dae7d18 100644
--- a/secretmanager/apiv1beta1/doc.go
+++ b/secretmanager/apiv1beta1/doc.go
@@ -51,7 +51,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/secretmanager/apiv1beta1/secret_manager_client.go b/secretmanager/apiv1beta1/secret_manager_client.go
index de84dd2..254f2f0 100644
--- a/secretmanager/apiv1beta1/secret_manager_client.go
+++ b/secretmanager/apiv1beta1/secret_manager_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	secretmanagerpb "google.golang.org/genproto/googleapis/cloud/secretmanager/v1beta1"
 	iampb "google.golang.org/genproto/googleapis/iam/v1"
@@ -58,7 +59,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("secretmanager.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("secretmanager.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("secretmanager.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/security/privateca/apiv1beta1/certificate_authority_client.go b/security/privateca/apiv1beta1/certificate_authority_client.go
index 3f6dd50..3c5315a 100644
--- a/security/privateca/apiv1beta1/certificate_authority_client.go
+++ b/security/privateca/apiv1beta1/certificate_authority_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	privatecapb "google.golang.org/genproto/googleapis/cloud/security/privateca/v1beta1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -65,7 +66,8 @@
 
 func defaultCertificateAuthorityClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("privateca.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("privateca.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("privateca.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/security/privateca/apiv1beta1/doc.go b/security/privateca/apiv1beta1/doc.go
index 73dd3a0..15f37fc 100644
--- a/security/privateca/apiv1beta1/doc.go
+++ b/security/privateca/apiv1beta1/doc.go
@@ -46,7 +46,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/securitycenter/apiv1/doc.go b/securitycenter/apiv1/doc.go
index 09beedb..0f15a70 100644
--- a/securitycenter/apiv1/doc.go
+++ b/securitycenter/apiv1/doc.go
@@ -49,7 +49,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/securitycenter/apiv1/security_center_client.go b/securitycenter/apiv1/security_center_client.go
index 37c5387..be860f7 100644
--- a/securitycenter/apiv1/security_center_client.go
+++ b/securitycenter/apiv1/security_center_client.go
@@ -30,6 +30,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	securitycenterpb "google.golang.org/genproto/googleapis/cloud/securitycenter/v1"
 	iampb "google.golang.org/genproto/googleapis/iam/v1"
@@ -70,7 +71,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("securitycenter.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("securitycenter.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("securitycenter.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/securitycenter/apiv1beta1/doc.go b/securitycenter/apiv1beta1/doc.go
index bb04983..8b53333 100644
--- a/securitycenter/apiv1beta1/doc.go
+++ b/securitycenter/apiv1beta1/doc.go
@@ -51,7 +51,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/securitycenter/apiv1beta1/security_center_client.go b/securitycenter/apiv1beta1/security_center_client.go
index 81a4e22..d53689e 100644
--- a/securitycenter/apiv1beta1/security_center_client.go
+++ b/securitycenter/apiv1beta1/security_center_client.go
@@ -30,6 +30,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	securitycenterpb "google.golang.org/genproto/googleapis/cloud/securitycenter/v1beta1"
 	iampb "google.golang.org/genproto/googleapis/iam/v1"
@@ -65,7 +66,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("securitycenter.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("securitycenter.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("securitycenter.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/securitycenter/apiv1p1beta1/doc.go b/securitycenter/apiv1p1beta1/doc.go
index db40f7f..2cbbcd4 100644
--- a/securitycenter/apiv1p1beta1/doc.go
+++ b/securitycenter/apiv1p1beta1/doc.go
@@ -51,7 +51,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/securitycenter/apiv1p1beta1/security_center_client.go b/securitycenter/apiv1p1beta1/security_center_client.go
index dcc13ba..57da74e 100644
--- a/securitycenter/apiv1p1beta1/security_center_client.go
+++ b/securitycenter/apiv1p1beta1/security_center_client.go
@@ -30,6 +30,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	securitycenterpb "google.golang.org/genproto/googleapis/cloud/securitycenter/v1p1beta1"
 	iampb "google.golang.org/genproto/googleapis/iam/v1"
@@ -70,7 +71,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("securitycenter.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("securitycenter.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("securitycenter.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/securitycenter/settings/apiv1beta1/doc.go b/securitycenter/settings/apiv1beta1/doc.go
index eb88799..f7d84ff 100644
--- a/securitycenter/settings/apiv1beta1/doc.go
+++ b/securitycenter/settings/apiv1beta1/doc.go
@@ -51,7 +51,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/securitycenter/settings/apiv1beta1/security_center_settings_client.go b/securitycenter/settings/apiv1beta1/security_center_settings_client.go
index ffe56a8..5944de0 100644
--- a/securitycenter/settings/apiv1beta1/security_center_settings_client.go
+++ b/securitycenter/settings/apiv1beta1/security_center_settings_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	settingspb "google.golang.org/genproto/googleapis/cloud/securitycenter/settings/v1beta1"
 	"google.golang.org/grpc"
@@ -55,7 +56,8 @@
 
 func defaultSecurityCenterSettingsClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("securitycenter.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("securitycenter.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("securitycenter.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/servicedirectory/apiv1beta1/doc.go b/servicedirectory/apiv1beta1/doc.go
index cda67bd..691cdb2 100644
--- a/servicedirectory/apiv1beta1/doc.go
+++ b/servicedirectory/apiv1beta1/doc.go
@@ -50,7 +50,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/servicedirectory/apiv1beta1/lookup_client.go b/servicedirectory/apiv1beta1/lookup_client.go
index a81b2f1..579e94b 100644
--- a/servicedirectory/apiv1beta1/lookup_client.go
+++ b/servicedirectory/apiv1beta1/lookup_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	servicedirectorypb "google.golang.org/genproto/googleapis/cloud/servicedirectory/v1beta1"
 	"google.golang.org/grpc"
@@ -41,7 +42,8 @@
 
 func defaultLookupClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("servicedirectory.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("servicedirectory.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("servicedirectory.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/servicedirectory/apiv1beta1/registration_client.go b/servicedirectory/apiv1beta1/registration_client.go
index 6d2eaef..567a437 100644
--- a/servicedirectory/apiv1beta1/registration_client.go
+++ b/servicedirectory/apiv1beta1/registration_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	servicedirectorypb "google.golang.org/genproto/googleapis/cloud/servicedirectory/v1beta1"
 	iampb "google.golang.org/genproto/googleapis/iam/v1"
@@ -61,7 +62,8 @@
 
 func defaultRegistrationClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("servicedirectory.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("servicedirectory.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("servicedirectory.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/spanner/admin/database/apiv1/database_admin_client.go b/spanner/admin/database/apiv1/database_admin_client.go
index d1f3ef5..43007a2 100644
--- a/spanner/admin/database/apiv1/database_admin_client.go
+++ b/spanner/admin/database/apiv1/database_admin_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	iampb "google.golang.org/genproto/googleapis/iam/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -63,7 +64,8 @@
 
 func defaultDatabaseAdminClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("spanner.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("spanner.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("spanner.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/spanner/admin/database/apiv1/doc.go b/spanner/admin/database/apiv1/doc.go
index b046722..00f1056 100644
--- a/spanner/admin/database/apiv1/doc.go
+++ b/spanner/admin/database/apiv1/doc.go
@@ -46,7 +46,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/spanner/admin/instance/apiv1/doc.go b/spanner/admin/instance/apiv1/doc.go
index 17db9c9..7cfca12 100644
--- a/spanner/admin/instance/apiv1/doc.go
+++ b/spanner/admin/instance/apiv1/doc.go
@@ -46,7 +46,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/spanner/admin/instance/apiv1/instance_admin_client.go b/spanner/admin/instance/apiv1/instance_admin_client.go
index 5d7fcc1..c88ae1e 100644
--- a/spanner/admin/instance/apiv1/instance_admin_client.go
+++ b/spanner/admin/instance/apiv1/instance_admin_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	iampb "google.golang.org/genproto/googleapis/iam/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -56,7 +57,8 @@
 
 func defaultInstanceAdminClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("spanner.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("spanner.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("spanner.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/spanner/apiv1/doc.go b/spanner/apiv1/doc.go
index 65d03db..572d728 100644
--- a/spanner/apiv1/doc.go
+++ b/spanner/apiv1/doc.go
@@ -49,7 +49,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/spanner/apiv1/spanner_client.go b/spanner/apiv1/spanner_client.go
index e1c8c7c..13de53a 100644
--- a/spanner/apiv1/spanner_client.go
+++ b/spanner/apiv1/spanner_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	spannerpb "google.golang.org/genproto/googleapis/spanner/v1"
 	"google.golang.org/grpc"
@@ -57,7 +58,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("spanner.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("spanner.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("spanner.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/spanner/go.mod b/spanner/go.mod
index 9a02e32..8c88f80 100644
--- a/spanner/go.mod
+++ b/spanner/go.mod
@@ -8,10 +8,10 @@
 	github.com/google/go-cmp v0.5.2
 	github.com/googleapis/gax-go/v2 v2.0.5
 	go.opencensus.io v0.22.5
-	golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6 // indirect
+	golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1
-	google.golang.org/api v0.33.0
-	google.golang.org/genproto v0.0.0-20201021134325-0d71844de594
+	google.golang.org/api v0.34.0
+	google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5
 	google.golang.org/grpc v1.32.0
 	google.golang.org/protobuf v1.25.0
 )
diff --git a/spanner/go.sum b/spanner/go.sum
index b31d926..f89bd36 100644
--- a/spanner/go.sum
+++ b/spanner/go.sum
@@ -265,6 +265,8 @@
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20201010224723-4f7140c49acb h1:mUVeFHoDKis5nxCAzoAi7E8Ghb86EXh/RK6wtvJIqRY=
 golang.org/x/net v0.0.0-20201010224723-4f7140c49acb/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974 h1:IX6qOQeG5uLjB/hjjwjedwfjND0hgjPMMyO1RoIXQNI=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45 h1:SVwTIAaPC2U/AvvLNZ2a7OVsmBpC8L5BlwK1whH3hm0=
@@ -286,6 +288,7 @@
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a h1:WXEvlFVvvGxCJLG6REjsT03iWnKLEWinaScsxF2Vm2o=
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -396,8 +399,8 @@
 golang.org/x/tools v0.0.0-20200904185747-39188db58858/go.mod h1:Cj7w3i3Rnn0Xh82ur9kSqwfTHTeVxaDqrfMjpcNT6bE=
 golang.org/x/tools v0.0.0-20201017001424-6003fad69a88 h1:ZB1XYzdDo7c/O48jzjMkvIjnC120Z9/CwgDWhePjQdQ=
 golang.org/x/tools v0.0.0-20201017001424-6003fad69a88/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6 h1:ov/kH02/RUWYnR/kPSTGM8hFzZglJT6cBNDXVDoxmJY=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 h1:rbvTkL9AkFts1cgI78+gG6Yu1pwaqX6hjSJAatB78E4=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -421,6 +424,8 @@
 google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc=
 google.golang.org/api v0.33.0 h1:+gL0XvACeMIvpwLZ5rQZzLn5cwOsgg8dIcfJ2SYfBVw=
 google.golang.org/api v0.33.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
+google.golang.org/api v0.34.0 h1:k40adF3uR+6x/+hO5Dh4ZFUqFp67vxvbpafFiJxl10A=
+google.golang.org/api v0.34.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
@@ -460,8 +465,8 @@
 google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154 h1:bFFRpT+e8JJVY7lMMfvezL1ZIwqiwmPl2bsE2yx4HqM=
 google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594 h1:JZWUHUjZJojCHxs9ZZLFsnRGKVBXBoOHGxeTSt6OE+Q=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5 h1:YejJbGvoWsTXHab4OKNrzk27Dr7s4lPLnewbHue1+gM=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
diff --git a/speech/apiv1/doc.go b/speech/apiv1/doc.go
index a5535b2..baaaebf 100644
--- a/speech/apiv1/doc.go
+++ b/speech/apiv1/doc.go
@@ -48,7 +48,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/speech/apiv1/speech_client.go b/speech/apiv1/speech_client.go
index dbb8520..413a524 100644
--- a/speech/apiv1/speech_client.go
+++ b/speech/apiv1/speech_client.go
@@ -25,6 +25,7 @@
 	lroauto "cloud.google.com/go/longrunning/autogen"
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	speechpb "google.golang.org/genproto/googleapis/cloud/speech/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -44,7 +45,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("speech.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("speech.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("speech.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/speech/apiv1p1beta1/doc.go b/speech/apiv1p1beta1/doc.go
index 9f10363..9507bd5 100644
--- a/speech/apiv1p1beta1/doc.go
+++ b/speech/apiv1p1beta1/doc.go
@@ -50,7 +50,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/speech/apiv1p1beta1/speech_client.go b/speech/apiv1p1beta1/speech_client.go
index b0c0e56..8fc9d80 100644
--- a/speech/apiv1p1beta1/speech_client.go
+++ b/speech/apiv1p1beta1/speech_client.go
@@ -25,6 +25,7 @@
 	lroauto "cloud.google.com/go/longrunning/autogen"
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	speechpb "google.golang.org/genproto/googleapis/cloud/speech/v1p1beta1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -44,7 +45,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("speech.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("speech.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("speech.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/storage/go.mod b/storage/go.mod
index cf5578a..0433f0a 100644
--- a/storage/go.mod
+++ b/storage/go.mod
@@ -8,8 +8,8 @@
 	github.com/google/go-cmp v0.5.2
 	github.com/googleapis/gax-go/v2 v2.0.5
 	golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43
-	golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6 // indirect
-	google.golang.org/api v0.33.0
-	google.golang.org/genproto v0.0.0-20201021134325-0d71844de594
+	golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 // indirect
+	google.golang.org/api v0.34.0
+	google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5
 	google.golang.org/grpc v1.32.0
 )
diff --git a/storage/go.sum b/storage/go.sum
index 43b327a..c5d54c0 100644
--- a/storage/go.sum
+++ b/storage/go.sum
@@ -255,6 +255,8 @@
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20201010224723-4f7140c49acb h1:mUVeFHoDKis5nxCAzoAi7E8Ghb86EXh/RK6wtvJIqRY=
 golang.org/x/net v0.0.0-20201010224723-4f7140c49acb/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974 h1:IX6qOQeG5uLjB/hjjwjedwfjND0hgjPMMyO1RoIXQNI=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45 h1:SVwTIAaPC2U/AvvLNZ2a7OVsmBpC8L5BlwK1whH3hm0=
@@ -275,6 +277,7 @@
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a h1:WXEvlFVvvGxCJLG6REjsT03iWnKLEWinaScsxF2Vm2o=
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -380,8 +383,8 @@
 golang.org/x/tools v0.0.0-20200904185747-39188db58858/go.mod h1:Cj7w3i3Rnn0Xh82ur9kSqwfTHTeVxaDqrfMjpcNT6bE=
 golang.org/x/tools v0.0.0-20201017001424-6003fad69a88 h1:ZB1XYzdDo7c/O48jzjMkvIjnC120Z9/CwgDWhePjQdQ=
 golang.org/x/tools v0.0.0-20201017001424-6003fad69a88/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6 h1:ov/kH02/RUWYnR/kPSTGM8hFzZglJT6cBNDXVDoxmJY=
-golang.org/x/tools v0.0.0-20201021122455-2be66b663cb6/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 h1:rbvTkL9AkFts1cgI78+gG6Yu1pwaqX6hjSJAatB78E4=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -405,6 +408,8 @@
 google.golang.org/api v0.30.0/go.mod h1:QGmEvQ87FHZNiUVJkT14jQNYJ4ZJjdRF23ZXz5138Fc=
 google.golang.org/api v0.33.0 h1:+gL0XvACeMIvpwLZ5rQZzLn5cwOsgg8dIcfJ2SYfBVw=
 google.golang.org/api v0.33.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
+google.golang.org/api v0.34.0 h1:k40adF3uR+6x/+hO5Dh4ZFUqFp67vxvbpafFiJxl10A=
+google.golang.org/api v0.34.0/go.mod h1:/XrVsuzM0rZmrsbjJutiuftIzeuTQcEeaYcSk/mQ1dg=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
@@ -444,8 +449,8 @@
 google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154 h1:bFFRpT+e8JJVY7lMMfvezL1ZIwqiwmPl2bsE2yx4HqM=
 google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594 h1:JZWUHUjZJojCHxs9ZZLFsnRGKVBXBoOHGxeTSt6OE+Q=
-google.golang.org/genproto v0.0.0-20201021134325-0d71844de594/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5 h1:YejJbGvoWsTXHab4OKNrzk27Dr7s4lPLnewbHue1+gM=
+google.golang.org/genproto v0.0.0-20201022181438-0ff5f38871d5/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
diff --git a/talent/apiv4/company_client.go b/talent/apiv4/company_client.go
index 3eab940..0051ee0 100644
--- a/talent/apiv4/company_client.go
+++ b/talent/apiv4/company_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	talentpb "google.golang.org/genproto/googleapis/cloud/talent/v4"
 	"google.golang.org/grpc"
@@ -47,7 +48,8 @@
 
 func defaultCompanyClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("jobs.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/talent/apiv4/completion_client.go b/talent/apiv4/completion_client.go
index 01d8637..7e68c68 100644
--- a/talent/apiv4/completion_client.go
+++ b/talent/apiv4/completion_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	talentpb "google.golang.org/genproto/googleapis/cloud/talent/v4"
 	"google.golang.org/grpc"
@@ -41,7 +42,8 @@
 
 func defaultCompletionClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("jobs.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/talent/apiv4/doc.go b/talent/apiv4/doc.go
index bf7c651..5b8c6e5 100644
--- a/talent/apiv4/doc.go
+++ b/talent/apiv4/doc.go
@@ -46,7 +46,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/talent/apiv4/event_client.go b/talent/apiv4/event_client.go
index c9da35a..baf37b8 100644
--- a/talent/apiv4/event_client.go
+++ b/talent/apiv4/event_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	talentpb "google.golang.org/genproto/googleapis/cloud/talent/v4"
 	"google.golang.org/grpc"
@@ -40,7 +41,8 @@
 
 func defaultEventClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("jobs.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/talent/apiv4/job_client.go b/talent/apiv4/job_client.go
index 9da7049..cce71e1 100644
--- a/talent/apiv4/job_client.go
+++ b/talent/apiv4/job_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	talentpb "google.golang.org/genproto/googleapis/cloud/talent/v4"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -55,7 +56,8 @@
 
 func defaultJobClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("jobs.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/talent/apiv4/tenant_client.go b/talent/apiv4/tenant_client.go
index 8248ba3..d1c58b3 100644
--- a/talent/apiv4/tenant_client.go
+++ b/talent/apiv4/tenant_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	talentpb "google.golang.org/genproto/googleapis/cloud/talent/v4"
 	"google.golang.org/grpc"
@@ -47,7 +48,8 @@
 
 func defaultTenantClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("jobs.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/talent/apiv4beta1/application_client.go b/talent/apiv4beta1/application_client.go
index cbadb84..1c9bce0 100644
--- a/talent/apiv4beta1/application_client.go
+++ b/talent/apiv4beta1/application_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	talentpb "google.golang.org/genproto/googleapis/cloud/talent/v4beta1"
 	"google.golang.org/grpc"
@@ -47,7 +48,8 @@
 
 func defaultApplicationClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("jobs.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/talent/apiv4beta1/company_client.go b/talent/apiv4beta1/company_client.go
index 702c783..3c20b0a 100644
--- a/talent/apiv4beta1/company_client.go
+++ b/talent/apiv4beta1/company_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	talentpb "google.golang.org/genproto/googleapis/cloud/talent/v4beta1"
 	"google.golang.org/grpc"
@@ -47,7 +48,8 @@
 
 func defaultCompanyClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("jobs.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/talent/apiv4beta1/completion_client.go b/talent/apiv4beta1/completion_client.go
index 0fab282..224e4da 100644
--- a/talent/apiv4beta1/completion_client.go
+++ b/talent/apiv4beta1/completion_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	talentpb "google.golang.org/genproto/googleapis/cloud/talent/v4beta1"
 	"google.golang.org/grpc"
@@ -41,7 +42,8 @@
 
 func defaultCompletionClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("jobs.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/talent/apiv4beta1/doc.go b/talent/apiv4beta1/doc.go
index 22da4c9..25d3c0a 100644
--- a/talent/apiv4beta1/doc.go
+++ b/talent/apiv4beta1/doc.go
@@ -51,7 +51,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/talent/apiv4beta1/event_client.go b/talent/apiv4beta1/event_client.go
index f6646b1..d365dfd 100644
--- a/talent/apiv4beta1/event_client.go
+++ b/talent/apiv4beta1/event_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	talentpb "google.golang.org/genproto/googleapis/cloud/talent/v4beta1"
 	"google.golang.org/grpc"
@@ -40,7 +41,8 @@
 
 func defaultEventClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("jobs.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/talent/apiv4beta1/job_client.go b/talent/apiv4beta1/job_client.go
index c48b3bf..7eb1873 100644
--- a/talent/apiv4beta1/job_client.go
+++ b/talent/apiv4beta1/job_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	talentpb "google.golang.org/genproto/googleapis/cloud/talent/v4beta1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -55,7 +56,8 @@
 
 func defaultJobClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("jobs.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/talent/apiv4beta1/profile_client.go b/talent/apiv4beta1/profile_client.go
index 035ea50..d88e6cc 100644
--- a/talent/apiv4beta1/profile_client.go
+++ b/talent/apiv4beta1/profile_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	talentpb "google.golang.org/genproto/googleapis/cloud/talent/v4beta1"
 	"google.golang.org/grpc"
@@ -48,7 +49,8 @@
 
 func defaultProfileClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("jobs.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/talent/apiv4beta1/tenant_client.go b/talent/apiv4beta1/tenant_client.go
index 1d631ad..0de0914 100644
--- a/talent/apiv4beta1/tenant_client.go
+++ b/talent/apiv4beta1/tenant_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	talentpb "google.golang.org/genproto/googleapis/cloud/talent/v4beta1"
 	"google.golang.org/grpc"
@@ -47,7 +48,8 @@
 
 func defaultTenantClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("jobs.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("jobs.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/texttospeech/apiv1/doc.go b/texttospeech/apiv1/doc.go
index dc227d0..95a40af 100644
--- a/texttospeech/apiv1/doc.go
+++ b/texttospeech/apiv1/doc.go
@@ -49,7 +49,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/texttospeech/apiv1/text_to_speech_client.go b/texttospeech/apiv1/text_to_speech_client.go
index cc091b1..95b8f65 100644
--- a/texttospeech/apiv1/text_to_speech_client.go
+++ b/texttospeech/apiv1/text_to_speech_client.go
@@ -23,6 +23,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	texttospeechpb "google.golang.org/genproto/googleapis/cloud/texttospeech/v1"
 	"google.golang.org/grpc"
@@ -40,7 +41,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("texttospeech.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("texttospeech.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("texttospeech.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/trace/apiv1/doc.go b/trace/apiv1/doc.go
index b8d883a..d38f4ba 100644
--- a/trace/apiv1/doc.go
+++ b/trace/apiv1/doc.go
@@ -52,7 +52,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/trace/apiv1/trace_client.go b/trace/apiv1/trace_client.go
index 0a31a5b..aae30ce 100644
--- a/trace/apiv1/trace_client.go
+++ b/trace/apiv1/trace_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	cloudtracepb "google.golang.org/genproto/googleapis/devtools/cloudtrace/v1"
 	"google.golang.org/grpc"
@@ -45,7 +46,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("cloudtrace.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("cloudtrace.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("cloudtrace.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/trace/apiv2/doc.go b/trace/apiv2/doc.go
index 241ca66..a7f0b2e 100644
--- a/trace/apiv2/doc.go
+++ b/trace/apiv2/doc.go
@@ -52,7 +52,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/trace/apiv2/trace_client.go b/trace/apiv2/trace_client.go
index 81c6e06..848a8ff 100644
--- a/trace/apiv2/trace_client.go
+++ b/trace/apiv2/trace_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	cloudtracepb "google.golang.org/genproto/googleapis/devtools/cloudtrace/v2"
 	"google.golang.org/grpc"
@@ -42,7 +43,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("cloudtrace.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("cloudtrace.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("cloudtrace.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/translate/apiv3/doc.go b/translate/apiv3/doc.go
index 8eb7f3c..b500b1a 100644
--- a/translate/apiv3/doc.go
+++ b/translate/apiv3/doc.go
@@ -48,7 +48,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/translate/apiv3/translation_client.go b/translate/apiv3/translation_client.go
index 039ef94..536b2f6 100644
--- a/translate/apiv3/translation_client.go
+++ b/translate/apiv3/translation_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	translatepb "google.golang.org/genproto/googleapis/cloud/translate/v3"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -53,7 +54,8 @@
 
 func defaultTranslationClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("translate.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("translate.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("translate.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/video/transcoder/apiv1beta1/doc.go b/video/transcoder/apiv1beta1/doc.go
index cc38e58..4578122 100644
--- a/video/transcoder/apiv1beta1/doc.go
+++ b/video/transcoder/apiv1beta1/doc.go
@@ -46,7 +46,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/video/transcoder/apiv1beta1/transcoder_client.go b/video/transcoder/apiv1beta1/transcoder_client.go
index 1bc2fe2..f92e2f1 100644
--- a/video/transcoder/apiv1beta1/transcoder_client.go
+++ b/video/transcoder/apiv1beta1/transcoder_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	transcoderpb "google.golang.org/genproto/googleapis/cloud/video/transcoder/v1beta1"
 	"google.golang.org/grpc"
@@ -49,7 +50,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("transcoder.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("transcoder.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("transcoder.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/videointelligence/apiv1/doc.go b/videointelligence/apiv1/doc.go
index f65f4cc..5b3719f 100644
--- a/videointelligence/apiv1/doc.go
+++ b/videointelligence/apiv1/doc.go
@@ -50,7 +50,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/videointelligence/apiv1/video_intelligence_client.go b/videointelligence/apiv1/video_intelligence_client.go
index d312d31..2af4986 100644
--- a/videointelligence/apiv1/video_intelligence_client.go
+++ b/videointelligence/apiv1/video_intelligence_client.go
@@ -25,6 +25,7 @@
 	lroauto "cloud.google.com/go/longrunning/autogen"
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	videointelligencepb "google.golang.org/genproto/googleapis/cloud/videointelligence/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -42,7 +43,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("videointelligence.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("videointelligence.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("videointelligence.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/videointelligence/apiv1beta2/doc.go b/videointelligence/apiv1beta2/doc.go
index caff41e..fafbfb7 100644
--- a/videointelligence/apiv1beta2/doc.go
+++ b/videointelligence/apiv1beta2/doc.go
@@ -52,7 +52,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/videointelligence/apiv1beta2/video_intelligence_client.go b/videointelligence/apiv1beta2/video_intelligence_client.go
index 8708f1c..95b4778 100644
--- a/videointelligence/apiv1beta2/video_intelligence_client.go
+++ b/videointelligence/apiv1beta2/video_intelligence_client.go
@@ -25,6 +25,7 @@
 	lroauto "cloud.google.com/go/longrunning/autogen"
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	videointelligencepb "google.golang.org/genproto/googleapis/cloud/videointelligence/v1beta2"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -42,7 +43,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("videointelligence.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("videointelligence.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("videointelligence.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/vision/apiv1/doc.go b/vision/apiv1/doc.go
index 46fa0d1..8488071 100644
--- a/vision/apiv1/doc.go
+++ b/vision/apiv1/doc.go
@@ -50,7 +50,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/vision/apiv1/image_annotator_client.go b/vision/apiv1/image_annotator_client.go
index 8796f38..3e85611 100644
--- a/vision/apiv1/image_annotator_client.go
+++ b/vision/apiv1/image_annotator_client.go
@@ -27,6 +27,7 @@
 	lroauto "cloud.google.com/go/longrunning/autogen"
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	visionpb "google.golang.org/genproto/googleapis/cloud/vision/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -47,7 +48,8 @@
 
 func defaultImageAnnotatorClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("vision.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("vision.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("vision.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/vision/apiv1/product_search_client.go b/vision/apiv1/product_search_client.go
index 5a82981..a2e4167 100644
--- a/vision/apiv1/product_search_client.go
+++ b/vision/apiv1/product_search_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	visionpb "google.golang.org/genproto/googleapis/cloud/vision/v1"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -64,7 +65,8 @@
 
 func defaultProductSearchClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("vision.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("vision.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("vision.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/vision/apiv1p1beta1/doc.go b/vision/apiv1p1beta1/doc.go
index e474da1..026c4e5 100644
--- a/vision/apiv1p1beta1/doc.go
+++ b/vision/apiv1p1beta1/doc.go
@@ -52,7 +52,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/vision/apiv1p1beta1/image_annotator_client.go b/vision/apiv1p1beta1/image_annotator_client.go
index a363449..ac15012 100644
--- a/vision/apiv1p1beta1/image_annotator_client.go
+++ b/vision/apiv1p1beta1/image_annotator_client.go
@@ -23,6 +23,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	visionpb "google.golang.org/genproto/googleapis/cloud/vision/v1p1beta1"
 	"google.golang.org/grpc"
@@ -39,7 +40,8 @@
 
 func defaultImageAnnotatorClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("vision.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("vision.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("vision.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/webrisk/apiv1/doc.go b/webrisk/apiv1/doc.go
index 24507ef..636fbcc 100644
--- a/webrisk/apiv1/doc.go
+++ b/webrisk/apiv1/doc.go
@@ -46,7 +46,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/webrisk/apiv1/web_risk_client.go b/webrisk/apiv1/web_risk_client.go
index 9346d75..a2e2e9f 100644
--- a/webrisk/apiv1/web_risk_client.go
+++ b/webrisk/apiv1/web_risk_client.go
@@ -25,6 +25,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	webriskpb "google.golang.org/genproto/googleapis/cloud/webrisk/v1"
 	"google.golang.org/grpc"
@@ -44,7 +45,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("webrisk.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("webrisk.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("webrisk.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/webrisk/apiv1beta1/doc.go b/webrisk/apiv1beta1/doc.go
index 88901e5..f2da8fd 100644
--- a/webrisk/apiv1beta1/doc.go
+++ b/webrisk/apiv1beta1/doc.go
@@ -48,7 +48,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/webrisk/apiv1beta1/web_risk_service_v1_beta1_client.go b/webrisk/apiv1beta1/web_risk_service_v1_beta1_client.go
index 7e409da..f3a79bc 100644
--- a/webrisk/apiv1beta1/web_risk_service_v1_beta1_client.go
+++ b/webrisk/apiv1beta1/web_risk_service_v1_beta1_client.go
@@ -23,6 +23,7 @@
 
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	webriskpb "google.golang.org/genproto/googleapis/cloud/webrisk/v1beta1"
 	"google.golang.org/grpc"
@@ -41,7 +42,8 @@
 
 func defaultWebRiskServiceV1Beta1ClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("webrisk.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("webrisk.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("webrisk.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/websecurityscanner/apiv1/doc.go b/websecurityscanner/apiv1/doc.go
index b6edca7..c6f9d44 100644
--- a/websecurityscanner/apiv1/doc.go
+++ b/websecurityscanner/apiv1/doc.go
@@ -50,7 +50,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/websecurityscanner/apiv1/web_security_scanner_client.go b/websecurityscanner/apiv1/web_security_scanner_client.go
index bab0580..431f0d9 100644
--- a/websecurityscanner/apiv1/web_security_scanner_client.go
+++ b/websecurityscanner/apiv1/web_security_scanner_client.go
@@ -27,6 +27,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	websecurityscannerpb "google.golang.org/genproto/googleapis/cloud/websecurityscanner/v1"
 	"google.golang.org/grpc"
@@ -55,7 +56,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("websecurityscanner.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("websecurityscanner.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("websecurityscanner.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/workflows/apiv1beta/doc.go b/workflows/apiv1beta/doc.go
index 4c219e3..5f13349 100644
--- a/workflows/apiv1beta/doc.go
+++ b/workflows/apiv1beta/doc.go
@@ -46,7 +46,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/workflows/apiv1beta/workflows_client.go b/workflows/apiv1beta/workflows_client.go
index 773b035..bf81350 100644
--- a/workflows/apiv1beta/workflows_client.go
+++ b/workflows/apiv1beta/workflows_client.go
@@ -29,6 +29,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	workflowspb "google.golang.org/genproto/googleapis/cloud/workflows/v1beta"
 	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
@@ -49,7 +50,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("workflows.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("workflows.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("workflows.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
diff --git a/workflows/executions/apiv1beta/doc.go b/workflows/executions/apiv1beta/doc.go
index 66386b9..6fece86 100644
--- a/workflows/executions/apiv1beta/doc.go
+++ b/workflows/executions/apiv1beta/doc.go
@@ -46,7 +46,7 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20201021"
+const versionClient = "20201022"
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/workflows/executions/apiv1beta/executions_client.go b/workflows/executions/apiv1beta/executions_client.go
index 0a599d0..005ad78 100644
--- a/workflows/executions/apiv1beta/executions_client.go
+++ b/workflows/executions/apiv1beta/executions_client.go
@@ -26,6 +26,7 @@
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 	"google.golang.org/api/option"
+	"google.golang.org/api/option/internaloption"
 	gtransport "google.golang.org/api/transport/grpc"
 	executionspb "google.golang.org/genproto/googleapis/cloud/workflows/executions/v1beta"
 	"google.golang.org/grpc"
@@ -44,7 +45,8 @@
 
 func defaultClientOptions() []option.ClientOption {
 	return []option.ClientOption{
-		option.WithEndpoint("workflowexecutions.googleapis.com:443"),
+		internaloption.WithDefaultEndpoint("workflowexecutions.googleapis.com:443"),
+		internaloption.WithDefaultMTLSEndpoint("workflowexecutions.mtls.googleapis.com:443"),
 		option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
 		option.WithScopes(DefaultAuthScopes()...),
 		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(