Service APIs Overview

Pub/Sub has both traditional REST/HTTP and gRPC interfaces. If you don't want to use our client libraries to access the Pub/Sub API, you have the option of writing your own client libraries that use its REST/HTTP or gRPC API surface. We recommend this approach only if your programming language or other needs are not met by the provided client libraries.

gRPC API

You can generate your own gRPC client libraries in any gRPC-supported language for the Pub/Sub API from its .proto service definition using these resources:

REST/HTTP API

There are a number of options for interacting with a service's REST interface. To create your own clients, use the following resources:

Service Endpoints

Pub/Sub has global and regional service endpoints. The global REST/HTTP endpoint is https://pubsub.googleapis.com and the global gRPC endpoint is pubsub.googleapis.com.

Requests to the global endpoint originating from within Google Cloud are routed to the Pub/Sub in the region where they originate. Examples of origins considered within Google Cloud include clients running on Compute Engine or App Engine. Requests to the global endpoint made over Interconnect are routed similarly to requests originating in the region associated with the interconnection. In case Pub/Sub becomes unavailable in a region, requests originating within the same Google Cloud are not load balanced to a different region.

Requests sent to the global endpoint from outside of Google Cloud are routed to a nearby available region. The requests may be routed to a region with insufficient project quota for the request type. The region is also not guaranteed to be the closest geographically.

We recommend using regional endpoints as an alternative to the global one in the following cases:

  • High volume applications running outside of Google Cloud that require sufficient quota in all regions where traffic might be routed.
  • Applications with multiple subscriptions and subscribers that are running in a region different from the region where data is published. Publishers can publish messages via the regional endpoint corresponding to the subscribers' region in order to reduce egress costs.
  • Applications which require that data be processed in a specific region.

To send requests directly to a region, use the following regional Pub/Sub endpoints:

Region REST/HTTP endpoint gRPC Service
us-central1 https://us-central1-pubsub.googleapis.com us-central1-pubsub.googleapis.com
us-east1 https://us-east1-pubsub.googleapis.com us-east1-pubsub.googleapis.com
us-east4 https://us-east4-pubsub.googleapis.com us-east4-pubsub.googleapis.com
us-west1 https://us-west1-pubsub.googleapis.com us-west1-pubsub.googleapis.com
us-west2 https://us-west2-pubsub.googleapis.com us-west2-pubsub.googleapis.com
us-west3 https://us-west3-pubsub.googleapis.com us-west3-pubsub.googleapis.com
us-west4 https://us-west4-pubsub.googleapis.com us-west4-pubsub.googleapis.com
southamerica-east1 https://southamerica-east1-pubsub.googleapis.com southamerica-east1-pubsub.googleapis.com
northamerica-northeast1 https://northamerica-northeast1-pubsub.googleapis.com northamerica-northeast1-pubsub.googleapis.com
europe-central2 https://europe-central2-pubsub.googleapis.com europe-central2-pubsub.googleapis.com
europe-north1 https://europe-north1-pubsub.googleapis.com europe-north1-pubsub.googleapis.com
europe-west1 https://europe-west1-pubsub.googleapis.com europe-west1-pubsub.googleapis.com
europe-west2 https://europe-west2-pubsub.googleapis.com europe-west2-pubsub.googleapis.com
europe-west3 https://europe-west3-pubsub.googleapis.com europe-west3-pubsub.googleapis.com
europe-west4 https://europe-west4-pubsub.googleapis.com europe-west4-pubsub.googleapis.com
europe-west6 https://europe-west6-pubsub.googleapis.com europe-west6-pubsub.googleapis.com
australia-southeast1 https://australia-southeast1-pubsub.googleapis.com australia-southeast1-pubsub.googleapis.com
australia-southeast2 https://australia-southeast2-pubsub.googleapis.com australia-southeast2-pubsub.googleapis.com
asia-east1 https://asia-east1-pubsub.googleapis.com asia-east1-pubsub.googleapis.com
asia-east2 https://asia-east2-pubsub.googleapis.com asia-east2-pubsub.googleapis.com
asia-northeast1 https://asia-northeast1-pubsub.googleapis.com asia-northeast1-pubsub.googleapis.com
asia-northeast2 https://asia-northeast2-pubsub.googleapis.com asia-northeast2-pubsub.googleapis.com
asia-northeast3 https://asia-northeast3-pubsub.googleapis.com asia-northeast3-pubsub.googleapis.com
asia-south1 https://asia-south1-pubsub.googleapis.com asia-south1-pubsub.googleapis.com
asia-south2 https://asia-south2-pubsub.googleapis.com asia-south2-pubsub.googleapis.com
asia-southeast1 https://asia-southeast1-pubsub.googleapis.com asia-southeast1-pubsub.googleapis.com
asia-southeast2 https://asia-southeast2-pubsub.googleapis.com asia-southeast2-pubsub.googleapis.com