@strypey @smallcircles @skyfaller @hugh @bob https://rdf-pub.org is providing c2s. I started Testung with #andstatus but there where open questions regarding oauth if i remember right.

@skyfaller @hugh

Also #SocialHub #ActivityPub developer forum has a bunch of C2S-related topic. You can use the forum search facility.

https://socialhub.activitypub.rocks

A very detailed investigation on what is needed client-side can be found in the #AndStatus project. It was never completed AFAIK as there were among others no server implementations to test against.