For asynchronous, web hooks may not be the answer if clients can be behind a firewall. It's too much work to set up an externally accessible resource just for t

For asynchronous, web hooks may not be the answer if clients can be behind a firewall. It's too much work to set up an externally accessible resource just for this. Polling or some sort of "job" resource works great too. When we designed the Windows Azure management API, we wound up offering both and it has worked out pretty well.