ActivityPub

Server to Server This protocol is used to distribute activities between actors on different servers, tying them into the same social graph. Testing This category serves to broadly discuss test practices that help increase Fediverse interoperability. Client to Server This protocol permits a client to act on behalf of a user. E.g., a mobile app to interact with a social stream of the user’s actor. Threadiverse Working Group Social Web Task Force for Threaded Discussions on the Fediverse

Topic	Replies	Views	Activity
Guide for new ActivityPub implementers ActivityPub documentation , explanation This is an informal guide to help new implementers get up to speed with the ActivityPub specification (published as a W3C Recommendation) and how to build projects with ActivityPub support. :information_source: No…	47	106258	July 11, 2025
The ActivityPub Recommendation ActivityPub about	0	1077	September 12, 2019
Nomadic identity for the fediverse? ActivityPub	73	9578	July 11, 2025
ActivityPub Client API: A Way Forward Client to Server	3	26	July 7, 2025
Thoughts on ActivityPub + Dating apps Server to Server	7	112	July 3, 2025
ForumWG cancelled this month (July) Threadiverse Working Group	0	7	July 3, 2025
ATProto gets PDS ActivityPub support ActivityPub fediverse	8	124	July 1, 2025
Help debugging why mastodon isn't finding an actor Testing	16	182	June 22, 2025
Threaded Conversations with Posts from Other Protocols, SSO Posting, and Unauthenticated Sources Server to Server	0	25	June 7, 2025
ForumWG canceled this month (June) Threadiverse Working Group	0	14	June 3, 2025
Changeable usernames? Server to Server	63	5634	June 3, 2025
Wiki: Collected feedback on interop testing, methods, living docs and specs Testing testing , wiki :point_right: This is a wiki post and anyone is encouraged to Edit and add additional sources. ActivityPub Test Suite Needs “Status of a robust ActivityPub test suite?” on SocialHub by Tim Chambers (@tchambers). …	0	3319	September 1, 2023
Events Interoperability: Validation, minimum requirements, common extensions ActivityPub	24	564	May 26, 2025
Who should I send Delete activities to? Server to Server	15	83	May 24, 2025
Addressing confusion between `Create` and contained object Server to Server	10	66	May 24, 2025
FEP-4f05: Soft Deletion ActivityPub draft , fep	4	53	May 5, 2025
Oneboxes and URI separators are not synchronised when federated Server to Server discourse	1	25	May 4, 2025
Exposing edit history via Activitystreams ActivityPub	5	420	April 29, 2025
Friendship and other non-follow relationships ActivityPub fep	9	59	April 18, 2025
The Block activity, how's that supposed to work? Server to Server	15	717	April 18, 2025
Agenda Prep for April 2025 WG Meeting Threadiverse Working Group	2	32	April 3, 2025
Moving topics Threadiverse Working Group	6	23	April 2, 2025
FEP Implementation Metadata ActivityPub fep	1	43	March 16, 2025
Fediverse Relays ActivityPub	46	736	March 13, 2025
Static file ActivityPub ActivityPub server	22	3290	March 12, 2025
Can we add a generated JSON list of FEPs to the repo? ActivityPub fep	15	114	March 12, 2025
FEP-1d80: Feed Actor - a way to federate a collection of Group actors ActivityPub draft , fep	16	167	March 12, 2025
Algorithmless content sorting ActivityPub fep	3	53	March 11, 2025
The state of conversational contexts (February 2025) Threadiverse Working Group	34	135	March 11, 2025
Multi - dimensional reputation / expertise ActivityPub fep	1	21	March 9, 2025