Signals Notebook: Why Can't I Use an API Endpoint That Is Not Listed in the Open External API Documentation?

Description

I want to automate functionality available in Signals Notebook, but I cannot find the required endpoint in the Signals Notebook Open External API Documentation, and attempts to call the endpoint directly are unsuccessful.

Cause

The Signals Notebook Open External API Documentation is a catalog of API endpoints that are already exposed and supported for external use. If an endpoint is not listed in the documentation, it is not currently exposed for external access and cannot be used through custom integrations or API calls.

Solution

If the required functionality is not available through an exposed API endpoint, submit an enhancement request through the Ideas Portal for consideration in a future release.