This is an unofficial WebFinger server for facebook.com. It serves these endpoints:
https://facebook-webfinger.appspot.com/.well-known/host-metahttps://facebook-webfinger.appspot.com/.well-known/webfinger?resource={uri}https://facebook-webfinger.appspot.com/user?uri={uri}The user URI is acct:username@facebook.com,
where username is a username or user id. See the
WebFinger docs
for usage details.
Source: github.com/snarfed/webfinger-unofficial
Questions? Contact Ryan or the WebFinger mailing list.