ActivityPub

<hide> page type::article thing type::protocol </hide>

About

ActivityPub (AP) is an internet federation protocol. It became the primary federation protocol for Mastodon starting with approximately version 2, which previously had been based on OStatus.

AP became a W3C recommendation on 2018-01-23, due in large part to the popularity of Mastodon<ref name=CLW1 />.

Software

These primarily use AP:

• Calckey code
  • 2023-01-06 If you’re feeling adventurous, try out a CalcKey instance. Confusing at first, but way more features than Mastodon.
• GoToSocial
• Mastodon
• Misskey
• Pleroma
• Akkoma
• Takahē official

These support AP but primarily use another federation protocol:

• Hubzilla is based on the Zot protocol
• Friendica

Links

Reference

• Wikipedia (article created 2017-08-18)
• W3C
• ActivityPub.rocks - sort of a publicity site

History

• 2022-11-08 Christine Lemmer-Webber on octodon.social: «A lot of people contributed to ActivityPub, but I'm going to give a breakdown of the authors and what they did:»

Commentary

• 2022-11-24 weirder.earth/@noracodes «it's great to see that we have so many ActivityPub server implementations in different languages/ecosystems:» A short list follows; discussion in thread.
• 2018-06-23 How to implement a basic ActivityPub server by Eugen Rochko
• 2017-08-11 A lot of folks have rightly questioned why I'm so hot and cold on ActivityPub.

Code

• Kroeg, an ActivityPub server written in C#
• landrok/ActivityPub: ActivityPub library in PHP

Footnotes

<references> <ref name=CLW1>2018-01-23 toot by Christopher Lemmer Webber</ref> </references>