3 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
Full website audit in one call: accessibility (WCAG 2.1 A/AA via axe-core), on-page SEO, HTTP security headers and page speed / page weight, from a single browser load of one URL. Cheaper than four separate calls; if any...
WebFinger lookup (RFC 7033): resolves acct:user@domain or a resource URI via /.well-known/webfinger and returns the subject, aliases, and links (ActivityPub actor, profile page, avatar, OIDC issuer, remote-follow templat...
Fediverse NodeInfo for a server: follows /.well-known/nodeinfo to the newest schema and returns software name and version, supported protocols (activitypub…), total/active-month/active-half-year users, local posts, open...