ActivityPub


ActivityPub is an open, decentralized social networking protocol based on Pump.io's ActivityPump protocol. 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.

Project status

ActivityPub is a standard for the Internet in the Social Web Networking Group of the World Wide Web Consortium. 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.
In January 2018, the World Wide Web Consortium published the ActivityPub standard as a Recommendation.
The W3C Social Community Group maintains a forum for developers and offers a yearly free conference about the future of the world’s leading federated social web standard.
Former Diaspora community manager Sean Tilley wrote an article that suggests ActivityPub protocols may eventually provide a way to federate Internet platforms.

Notable implementations

Federated (server-to-server) protocol