Using Backend Swagger UI
The Backend API is documented and publicly available through Swagger UI. Swagger docs allows you to test the Backend REST API without having to setup the development environment.
In Google Summer of Code 2018 final demo, the backend was demonstrated through Swagger UI. Here's the video on Youtube, at the time of the demonstration.
Backend Swagger UI (dev): https://mentorship-backend-temp.herokuapp.com/
Swagger Usage Guides: