> ActivityPub is a decentralized social networking protocol based on the [[https://www.w3.org/TR/activitystreams-core/ | ActivityStreams 2.0]] data format. ActivityPub is an official W3C recommended standard published by the [[https://www.w3.org/wiki/Socialwg | W3C Social Web Working Group]].  It provides a client to server API for creating, updating and deleting content, as well as a federated server to server API for delivering notifications and subscribing to content.