WebSub: Open protocol for distributed pub–sub communication on the internet

Abstract
WebSub provides a common mechanism for communication between publishers of any kind of Web content and their subscribers, based on HTTP web hooks. Subscription requests are relayed through hubs, which validate and verify the request. Hubs then distribute new and updated content to subscribers when it becomes available. WebSub was previously known as PubSubHubbub.
Status of This Document

This section describes the status of this document at the time of its publication. Other documents may supersede this document. A list of current publications and the latest revision of this technical report can be found in the technical reports index at https://www.w3.org/TR/.

This document was published by the Social Web Working Group as a Recommendation.
Comments regarding this document are welcome. All interested parties are invited to provide implementation and bug reports and other comments through the Working Group’s Issue tracker. These will be discussed by


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