I've seen Google endpoints available over gRPC over the last few years. Many, if not most, of the Cloud endpoints are directly documented as being available ove

I've seen Google endpoints available over gRPC over the last few years. Many, if not most, of the Cloud endpoints are directly documented as being available over gRPC[0]. For others, like Google Ads, a peak at the client libraries show it's using gRPC[1] as well. [0]: https://cloud.google.com/pubsub/docs/reference/service_apis_overview#grpc_api https://cloud.google.com/pubsub/docs/reference/service_apis_... [1]: https://github.com/googleads/google-ads-java/blob/master/google-ads/src/main/java/com/google/ads/googleads/lib/GoogleAdsClient.java#L20 https://github.com/googleads/google-ads-java/blob/master/goo...