[Roboprog]

For lower volume "push" data, it would be nice if there were a convention in REST for how to request a subscription in which you provided the callback URL where the updates would be PUT.

Not that this scales as well as message service "topics" (with multiple subscribers/listeners), but it's a start, and doesn't sound much worse than the load for point-to-point queues.

[habitue]

This is basically the description of webhooks

[Roboprog]

Cool, thanks.