Comment by AShedOfTools

This is something that we're thinking about (https://github.com/redfin/react-server/issues/190), but that we just don't have an answer for right now. React Server was built with running two servers in mind, one for your api and React Server as your front-end. I haven't used Relay much, but I think you could run your Relay server as the api server, then make the request from React Server with ReactServerAgent and it should work?