github.com/fullstorydev/grpcui (go): Package grpcui provides a gRPC web UI in the form of HTTP handlers that can be added to a web server.  This package provides multiple functions which, all combined, provide a fully functional web UI. Users of this package can use these pieces to embed a UI into any existing web application. The web form sources can be embedded in an existing HTML page, and the HTTP handlers wired up to make the form fully functional.  For users that don't need as much control over layout and style of the web page, instead consider using standalone.Handler, which is an all-in-one handler that includes its own HTML and CSS as well as all other dependencies.
Keywords: golang|grpc|postman