gRPC-Gateway
gRPC to JSON proxy generator following the gRPC HTTP spec
...It reads a gRPC service definition and generates a reverse-proxy server which translates a RESTful JSON API into gRPC. This server is generated according to custom options in your gRPC definition. gRPC-Gateway helps you to provide your APIs in both gRPC and RESTful style at the same time. gRPC is great -- it generates API clients and server stubs in many programming languages, it is fast, easy to use, and bandwidth-efficient and its design is combat-proven by Google. However, you might still want to provide a traditional RESTful JSON API as well. ...