syntax = "proto3"; package answer; option go_package = "./proto;answer"; service Answer { rpc Question(QuestionRequest) returns (QuestionResponse) {} } // Ask a question and receive an instant answer message QuestionRequest { // the question to answer string query = 1; } message QuestionResponse { // the answer to your question string answer = 1; // a related url string url = 2; // any related image string image = 3; }