Google Cloud API Gateway can now expose REST APIs as MCP tools in preview
Original titleTurn your REST APIs into MCP tools with Google Cloud API Gateway
Google Cloud API Gateway now acts as a remote MCP server in Public Preview, making REST operations in an annotated OpenAPI 3.0.x or 3.1.x spec available as agent-ready MCP tools.
Existing JWT or API-key authentication, quotas, and logging apply to MCP calls, so teams do not need a separate MCP server.
Current limits include no support for OpenAPI 2.0, a maximum of 1,000 tools per gateway, and no MCP and model routing in the same API config.
The post shows how an existing OpenAPI spec becomes agent-callable MCP tools, with the same auth and quota policies applied, which helps teams avoid building a separate MCP server.
Source: Google Developers Blog · developers.googleblog.comPublished · added here