The html returned by a rest mapservice url includes "supported extensions" down at the bottom. However the json returned does not list the extensions. Is there a way to get this list of SOE's in a json format?
I'd include a sample url, but I can't find any rest SOE's when I search - does anyone know of a sample that has been published?
Update 2 ESRI support filed it as an enhance request (NIM062551).