Google Cloud API Gateway can now serve REST APIs as MCP tools
Google Cloud API Gateway is in Public Preview as a remote MCP server, letting existing REST operations be exposed to agents without a separate server. Developers opt in by annotating their OpenAPI 3.x spec and deploying the gateway, which then serves MCP at the /mcp path.
developers.googleblog.com/turn-your-rest-apis-into-mcp-tools-with-google-cloud-api-gateway