---
tags:
  - W3C
  - specification
link: https://www.w3.org/TR/activitypub/
published: 2018-01-23
---
Authors: [[Christine Lemmer-Webber]], [[Jessica Tallon]], [[Erin Shepherd]], [[Amy Guy]], [[Evan Prodromou]]
## Abstract

The ActivityPub protocol is a decentralized social networking protocol based upon the [[ActivityStreams]] 2.0 data format. 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 content.