First always check the functions on the Task object, they are the most straight forward access to the system.
Then if you need general purpose API calls, currently they are only documented in the doc-string of the API schema (that said it should be quite documented)
You can check all the endpoints https://github.com/allegroai/trains/tree/master/trains/backend_api/services/v2_8
And finally if you want to easily use the RestAPI :
from trains.backend_api.session.client import APIClient client = APIClient() client.tasks.get_all(only_field=['id'])This will call the https://github.com/allegroai/trains/blob/master/trains/backend_api/services/v2_8/tasks.py#L4182 endpoint