The Gurucan platform is completely built on the Rest API.
To access the API, generate a key in your online school settings and save the settings.
For authorization in the API, you need to pass this key as a gc-api-key header.
The API documentation does not yet cover all functions, but it is enough to implement simple integration scenarios.
Examples of using the API can be found here:
https://github.com/jdponomarev/gurucan-api
Please write to us if you have questions about the API, or haven't found any documentation for some methods.