@matigo: API bug confirmed for deleting via /content. One of three approaches to passing the post_id to delete works. It was, of course, the last one I tried.
Failing:
- As URL path component /content/ID (403, Invalid API Endpoint)
- As form URL-encoded body post_id=ID (400, Invalid Post ID)
Working:
- As JSON body {"post_id": "ID"}: 200, yay!