Simple Update Protocol, or SUP, is a protocol developed by

FriendFeed FriendFeed was a real-time feed aggregator that consolidated updates from social media and social networking websites, social bookmarking websites, blogs and microblogging updates, as well as any type of RSS/Atom (Web standard), Atom feed. It was ...

to simplify and speed up

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and

Atom Atoms are the basic particles of the chemical elements. An atom consists of a atomic nucleus, nucleus of protons and generally neutrons, surrounded by an electromagnetically bound swarm of electrons. The chemical elements are distinguished fr ...

feed updates. Updates from services that supported the protocol would appear on FriendFeed within seconds,

Paul Buchheit Paul T. Buchheit (born November 7, 1977) is an American computer engineer and entrepreneur who created the email service Gmail. He developed the original prototype of Google AdSense as part of his work on Gmail. He also suggested Google's former ...

''Simple Update Protocol: Fetch updates from feeds faster''
''FriendFeed Blog'', August 27, 2008. until support was dropped. These sites include

Disqus Disqus () is an American blog comment hosting service for websites and online communities that use a networked platform. The company's platform includes various features, such as social integration, social networking, user profiles, spam and ...

Identi.ca identi.ca is a free and open-source social networking and blogging service based on the pump.io software, using the Activity Streams protocol. Identi.ca stopped accepting new registrations in 2013, but continues to operate alongside several o ...

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Functioning

SUP introduces SUP feeds, which are lists of RSS and Atom feeds that have updated recently. A feed consumer (like FriendFeed, or a

feedreader In computing, a news aggregator, also termed a feed aggregator, content aggregator, feed reader, news reader, or simply an aggregator, is client software or a web application that aggregates digital content such as online newspapers, blogs, po ...

) can regularly

poll Poll, polled, or polling may refer to: Forms of voting and counting * Poll, a formal election ** Election verification exit poll, a survey taken to verify election counts ** Polling, voting to make decisions or determine opinions ** Polling pla ...

a small number of SUP feeds instead of polling each individual feed. RSS and Atom feeds are identified in SUP feeds by an opaque, unique identifier derived from their URL. This allows a SUP feed to index private feeds without revealing their URL. SUP feeds are intended to be managed by services that publish large amounts of RSS and Atom feeds, though FriendFeed also hosted a public SUP feed which anyone could post updates to. The mechanism for posting updates to a public SUP feed is not standardised.

Past Support

* Brightkite supported SUP but was itself shutdown in April 2012. *

YouTube YouTube is an American social media and online video sharing platform owned by Google. YouTube was founded on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim who were three former employees of PayPal. Headquartered in ...

's API v2.0 supported SUP, but that version of the API was deprecated in 2014 and YouTube's SUP feed was eventually shut down. YouTube data API v3 supports PubSubHubbub instead.''Subscribe to Push Notifications''
''Youtube - Data API''

Functioning

Past Support

References

External links

See also