Simple Update Protocol (SUP)

Context Voice supports Simple Update Protocol aka SUP.  SUP is a project developed and maintained by the good folks at FriendFeed.

Context Voice SUP is a a simple and compact "ping feed" that alerts your web app a conversation has been updated. This reduces update latency and improves efficiency by eliminating the need for frequent polling.

Context Voice SUP is available at http://api.contextvoice.com/sup.json/?apikey=yourapikey