First of all please excuse me for opening new thread, however, the other one is few years old.
I was wondering whether https://data.stackexchange.com/stackoverflow/atom supports JSONP at all. Adding $callback and $filter to the query string results in server-side error. On the other hand, it is not possible to add Accept: "application/json" header for JSONP requests. Finally I tried accessing the service with "normal" (non JSONP) request, hoping that there is CORS however, no avail.