From their site: Disqus provides an API for users to interact with the Disqus backend. Disqus is the webwide discussion community where you carry your conversations with you. For Bloggers - Plug in and experience the best comment system, backed by your own forum. For Everyone - Claim and track your comments across blogs!
Twelve APIs have been added to the ProgrammableWeb directory in categories including Healthcare, Financial, and Augmented Reality. Also new to the directory are SDKs for Gliffy, a diagram and chart creation service, and Disqus comments platform. Here's a rundown of the latest additions.
With the recent unveiling of Facebook comments, many have questioned the future of Disqus, the previous comment widget darling. There are some advantages to each, but something Disqus definitely has going for it is its
Disqus API, as well as other features like email moderation.