ActivityPub

ActivityPub is an open, decentralized social networking protocol based on Pump.io's ActivityPump protocol.[1] It provides a client/server API for creating, updating, and deleting content, as well as a federated server-to-server API for delivering notifications and content.

ActivityPub
Communication protocol
Developer(s)World Wide Web Consortium
IntroducedJanuary 23, 2018 (2018-01-23)
Websiteactivitypub.rocks
Mechanics

Project status

ActivityPub is a standard for the Internet in the Social Web Networking Group of the World Wide Web Consortium (W3C). At an earlier stage, the name of the protocol was "ActivityPump", but it was felt that ActivityPub better indicated the cross-publishing purpose of the protocol. It learned from the experiences with the older standard called OStatus.[2]

In January 2018, the World Wide Web Consortium (W3C) published the ActivityPub standard as a Recommendation.[3]

The W3C Social Community Group organizes a yearly free conference about the future of the ActivityPub.[4][5]

Former Diaspora community manager Sean Tilley wrote an article that suggests ActivityPub protocols may eventually provide a way to federate Internet platforms.[6]

Notable implementations

Federated (server-to-server) protocol
  • Mastodon, a social networking software, implemented ActivityPub in version 1.6, released on 10 September 2017. It is intended that ActivityPub offers more security for private messages than the previous OStatus protocol does.[7]
  • Nextcloud, a federated service for file hosting.[8]
  • PeerTube, a federated service for video streaming.[7]
  • Friendica, a social networking software, implemented ActivityPub in version 2019.01.[9]
  • Mobilizon, an event planner software from Framasoft.[10]
  • Pixelfed, a federated photo sharing platform similar to Instagram.[11]
  • Pleroma is a ActivityPub compatible, low resource requirement, microblogging platform.
  • Misskey is an open source, and a decentralized microblogging service[12]

See also

References
  1. "Sandstorm and the Social Web". zenhack.net. 29 May 2016.
  2. Holloway, James (18 September 2018). "What on Earth is the fediverse and why does it matter?". New Atlas. Retrieved 3 July 2020.
  3. "W3C Recommendation 23 January 2018".
  4. "ActivityPub Conf 2020".
  5. "ActivityPub Conf 2019".
  6. Tilley, Sean (23 September 2017). "A quick guide to The Free Network".
  7. "Server-Server - ActivityPub implementation reports". Retrieved 2019-01-02.
  8. Wallen, Jack (22 January 2019). "Nextcloud Social is a promising collaborative feature". Tech Republic. Retrieved 3 July 2020.
  9. "Friendica 2019.01 released". Retrieved 2019-01-24.
  10. [email protected]. "Mobilizon de Framasoft gère maintenant la fédération des installations - Next INpact". www.nextinpact.com (in French). Retrieved 2019-12-19.
  11. Kala Bhavani, Divya (27 November 2019). "Mastodon announces Pixelfed, an open-source alternative to Instagram". The Hindu. Retrieved 3 July 2020.
  12. https://wedistribute.org/2019/03/introducing-misskey-a-fediverse-microblogging-app-built-with-node/
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