ActivityPub W3C Recommendation 23 January 2018 This version: https://www.w3.org/TR/2018/REC-activitypub-20180123/ Latest published version: https://www.w3.org/TR/activitypub/ Latest editor's draft: https://w3c.github.io/activitypub/ Test suite: https://test.activitypub.rocks/ Implementation report: https://activitypub.rocks/implementation-report Previous version: https://www.w3.org/TR/2017/PR-acti