Google Cloud API Gateway now supports acting as a remote MCP server in Public Preview. Developers can annotate their existing OpenAPI specs to make REST operations available as MCP tools, with API Gateway handling transcoding, authentication, quota, and logging through the same policies as REST traffic. The feature supports up to 1,000 tools per gateway, requires JWT (not API keys) to secure tool discovery in production, and cannot be combined with model routing in the same API config.
Read the full story on developers.googleblog.com
What to doAnnotate your OpenAPI spec with MCP metadata and deploy it to Google Cloud API Gateway to expose existing REST APIs as MCP tools without building a separate server.
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