Ok, using the first item as an example (http://3taps.com/developers-overview.php http://3taps.com/developers-overview.php). None of their endpoints seems to sup

Ok, using the first item as an example (http://3taps.com/developers-overview.php http://3taps.com/developers-overview.php). None of their endpoints seems to support SSE, long-polling, streams, websockets, tcp sockets or any other type of "real-time" feeds. But they do have a polling endpoint that you have to hit with GET requests. Does that classify as real-time in your list?