Google Cloud Speech API Documentation Documentation APIs & Reference Google Cloud Speech API Client Libraries Get started with Google Cloud Speech API in your language of choice. Cloud Speech REST API v1 REST API Reference. (Non-streaming JSON.) Cloud Speech RPC API v1 gRPC API Reference. (Streaming and non-streaming Proto3.) Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates.