Vieux con: ça me rappelle la commande "finger" dans les terminaux texte.
C'est un protocole: WebFinger @wikipedia. Extrait:
Enter WebFinger. WebFinger as described in RFC 7033 is a spec that defines a method for resolving links to a resource, given only a URI on a particular server. This allows anyone to look up where a resource is located without having to know its exact location beforehand; for example, by email or phone number. This lookup is directed at the endpoint /.well-known/webfinger, and a resource query parameter is passed along with the lookup. The resource URI used with Mastodon is the acct: URI as described in RFC 7565, with the username of a profile that is hosted on a particular domain.
Mon Webfinger sur l'instance Mastodon où je traine: https://framapiaf.org/.well-known/webfinger?resource=acct:Arfy@framapiaf.org