pRPC: gRPC on Classic AppEngine today gRPC is great, but is not available on Classic AppEngine at this time, so while waiting for it we wrote pRPC (provisional RPC) for Go. It is compatible with gRPC server/client code, but works on HTTP 1.x and Classic AppEngine. In addition it has gRPC-compatible discovery and a CLI tool. IDLJust like gRPC, pRPC uses Protocol Buffers to define API. I assume you