[hedora]

While I agree, gRPC is based on protobufs, which are incredibly weakly typed. They specifically include mechanisms for passing through mysterious (not in the schema and of unknown type) data intact.

So, I’d argue the OP is using gRPC correctly, and I’d be using it wrong if I hadn’t given up on it long ago. I appreciate things like static type checking, and services that err on the side of rejecting unparsable requests in order to avoid data corruption. Protobufs/gRPC require heroic effort on the part of the RPC handler implementation if you want those things. In particular, it is easier to implement your own serialization format than typecheck the results returned by the APIs protoc emits.