Egregoros

On mostr.pub you can claim a username now. Then your Nostr account will show up as <username>@mostr.pub on Mastadon.
https://blossom.ditto.pub/244a0e4757ffa5ed403b1aaa10df9d769bb680b37b84ba7c3dee882629546e2b.png

I'm alex@mostr.pub