After login in the dashboard, the API key is not used in the various forms of the API playground, but it should according to the info (which is displayed when not logged in and clicking on “API Playround”):
Thank you for the feedback.
We are already aware of this issue. This should only be the case for GET endopints.
It will be fixed soon.
Can you confirm that it is not happening for POST endpoints?
Best regards, Amandus