APIAPI Suported API versionsv2 API reference BootstrapListenersClustersHTTP route managementExtensionsAdminEnvoy dataServicesCommon messagesTypes v3 API reference BootstrapListenersClustersHTTP route managementExtensionsAdminEnvoy dataServicesCommon messagesTypes xDS REST and gRPC protocol Resource TypesFilesystem subscriptionsStreaming gRPC subscriptionsREST-JSON polling subscriptions Well Known Client Features Currently Defined Client Features