Service to handle requests for the Devdocs MCP server.

| [ForwardMcpMessage](https://developers.google.com/merchant/api/reference/rpc/google.shopping.merchant.mcp.devdocs/DevdocsMcpService/ForwardMcpMessage) |
|---|
| `` rpc ForwardMcpMessage(`https://developers.google.com/merchant/api/reference/rpc/google.api/Types/HttpBody`) returns (`https://developers.google.com/merchant/api/reference/rpc/google.api/Types/HttpBody`) `` Authorization scopes :   Requires the following OAuth scope: - `https://www.googleapis.com/auth/content` For more information, see the [OAuth 2.0 Overview](https://developers.google.com/identity/protocols/OAuth2). |