React Router - json endpoint

Hi there,
I’m working on an app which is fully build upon the react router. Now I’m at the point where i need a simple json api endpoint. Unfortunately I do not see any way to get pure json output (server rendering).

There is this post but this does not seem to work with meteor, or at least I do not know how to.

There is also a pure json endpoint router but again I do not know if there is any way to run two routers alongside each other.

Do you have any idea on how I could solve this?