@smallcircles
> what is needed client-side can be found in the AndStatus project ... there were among others no server implementations to test against
Seems like Pleroma had it working before mid-2020;
https://pleroma.social/announcements/2020/05/10/pleroma-security-release-2-0-4/
The Epicyon server has support for AP C2S too, so that could also be used to test apps trying to implement it;
https://libreserver.org/epicyon/
Was any of this mentioned in the SH thread?