The ActivityPub Client-to-Server (C2S) protocol was envisioned as a cornerstone of the decentralized social web, along with the Server-to-Server (S2S) protocol. Standardized by the W3C in 2018, C2S defines how user-facing applications, such as mobile apps or web clients, and bots should interact with social servers using Activity Streams 2.0 and JSON-LD. In theory, it ... Read more
@hongminhee
Also have a look at this issue tracking #ActivityPub C2S implementations.
https://codeberg.org/fediverse/delightful-fediverse-apps/issues/130
@smallcircles @hongminhee and the ActivityPub API task force at the W3C!
https://github.com/swicg/activitypub-api