Hubert is OpenAPI compliant. You can find the full, up-to-date API specification here:

Hubert 1.1.2.0 OpenAPI specification

NOTE: The service URL in the documentation contains the customer section. In real-life scenario, this part of URL is replaced with customer subscription id. So in case of the customer Important Corp. with subscription id important the API URL will be:

https://meg.media-press.tv/important/hubert/api/1.1/

The URL ends with the two most important number from the API version to make the API versioning possible.