Kind of... there is https://indieweb.org/rel-me https://indieweb.org/rel-me which Mastodon does support and which can be used in tandem with https://indieweb.or

Kind of... there is https://indieweb.org/rel-me https://indieweb.org/rel-me which Mastodon does support and which can be used in tandem with https://indieweb.org/Web_sign-in https://indieweb.org/Web_sign-in