All the data you can see in the GP-Cloud user interface can be requested via the REST API. We use Swagger for documentation. It's available here:
https://gp-cloud.io/swagger/index.html
How to Authorize
1. Post /api/Auth/login with the actual login and password:
2. From the result, copy the token without quotes:
3. Go to authorization:
4. Enter <Bearer> <space> <token>:
Now you can test any endpoints.