The PubSubHubbub protocol specification.
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Latest commit 22d9d17 Nov 1, 2017


IMPORTANT NOTE: The PubSubHubbub protocol has now been adopted by the W3C as a Candidate Recommendation. It's also been renamed WebSub for clarity and concision. Please consider upgrading all older PubSubHubbub implementations to WebSub.

PubSubHubbub is an open protocol for distributed publish/subscribe communication on the Internet. It generalizes the concept of webhooks and allows data producers and data consumers to work in a decoupled way.

PubSubHubbub provides a way to subscribe, unsubscribe and receive updates from a resource, whether it's an RSS or Atom feed or any web accessible document (JSON...).

The current version of the spec is 0.4. Please, read it here.

Open hubs are provided by:

Several other publishing platforms, like Wordpress, include their own hubs.

If you're looking for tutorials on how to get started with PubSubHubbub, check the links below: