ActivityPub

Testing This category serves to broadly discuss test practices that help increase Fediverse interoperability. Server to Server This protocol is used to distribute activities between actors on different servers, tying them into the same social graph. Threadiverse Working Group Social Web Task Force for Threaded Discussions on the Fediverse 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.

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	116594	July 11, 2025
The ActivityPub Recommendation ActivityPub about	0	1096	September 12, 2019
How to participate in the W3C Working Groups on AP ActivityPub	3	38	February 11, 2026
How to federate warnings? Server to Server	5	54	February 9, 2026
Thoughts on ActivityPub + Dating apps Server to Server	8	236	February 9, 2026
FEP-4f05: Soft Deletion ActivityPub draft , fep	24	163	February 7, 2026
Follow application actor has a way to get public activities Server to Server	1	17	February 5, 2026
RFC 9421 HTTP signatures in 2026 Server to Server	23	175	February 3, 2026
FEP-ee3a: Exif metadata support ActivityPub fep	5	87	February 2, 2026
Nomadic identity for the fediverse? ActivityPub	97	10011	February 2, 2026
FEP-8c13: Context-Authority Routing with Object Integrity Proofs for Restricted Threads ActivityPub	3	34	January 23, 2026
Idea for a more capable relay server Server to Server	2	45	January 18, 2026
Service Capability Discovery Server to Server interop , server	9	819	January 12, 2026
Events Interoperability: Validation, minimum requirements, common extensions ActivityPub	35	735	December 31, 2025
Pre-FEP: Evolving OrderedCollection to be more useful ActivityPub	1	104	December 31, 2025
Webfinger for non-actor objects and storing foreign objects Server to Server server	3	44	December 17, 2025
FEP-1580: Move Actor Objects with a `migration` Collection ActivityPub fep	22	354	November 18, 2025
FEP-d8c8: BitTorrent `Torrent` objects ActivityPub fep	11	208	November 9, 2025
FEP-19b3: Specifying Properties of a Service ActivityPub	0	26	November 4, 2025
Generate sharelinks ActivityPub	1	30	November 3, 2025
Pre-FEP: Reassigning Actor and CoAuthor Representation for Federated CMS ActivityPub draft	4	62	November 3, 2025
Possible C2S Implementation in LAUTI Client to Server	0	26	October 22, 2025
Quote Post Implementation Issues ActivityPub	2	132	September 29, 2025
Why does Mastodon.social send messages not addressed to me to my server? Server to Server	1	62	September 22, 2025
Fediverse, ActivityPub and the Ethics ActivityPub	5	114	September 18, 2025
Can we add a generated JSON list of FEPs to the repo? ActivityPub fep	16	132	August 28, 2025
Fediverse Relays ActivityPub	52	1225	August 26, 2025
How and when to update Actor objects? Server to Server	2	39	August 23, 2025
Potential security vulnerability: Remote JSON-LD contexts may be used to bypass restrictions when arbitrary objects are allowed to be created ActivityPub	22	308	August 21, 2025
Agenda Prep for August 2025 ForumWG Meeting Threadiverse Working Group	5	45	August 14, 2025