Set the workspace's default agent billing plan
AI > Billing
Set the workspace's default agent billing plan
Marks one plan as the workspace default, replacing whichever held the marker before — one marker per workspace, which is why this is a PUT on a singleton rather than a per-plan flag. Changes nothing for already-attached customers; it only decides what apply-default-plan applies. Deleting the marked plan clears the marker with it.
PUT
Set the workspace's default agent billing plan
Authorizations
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
Body
application/json
Which plan holds the default marker

