would love community contributions :-). I see some efforts in community but nothing very concrete yet. You can suggest project in gRPC Ecosystem. https://github.com/grpc-ecosystem
gRPC core libraries for C++ are written in pure C. We need to extend these to use a pure C implementation of Proto and create a C based generated API. We have experimented with this and some users have also tried it. We are looking to add this in future and also welcome contributions.