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The endpoint exists and enforces authentication; nothing behind that boundary — tools, behaviour, service health — has been observed."},"checks":{"total":108,"ok":108,"authBoundaryOk":108,"serviceOk":0,"note":"Counted from the observation rows for the window, checks of the server only (HTTP, A2A card, MCP initialize). ok = authBoundaryOk + serviceOk. `probes` is the sum of daily rollups and includes registry checks, so it can differ from `total`."}},"latestObservations":[{"at":"2026-10-10T15:31:11.756Z","kind":"mcp_initialize","ok":true,"httpStatus":401,"latencyMs":71,"error":null,"detail":{"authRequired":true,"wwwAuthenticate":"Bearer realm=\"mcp\", resource=\"https://singlefax.com/mcp\", resource_metadata=\"https://singlefax.com/.well-known/oauth-protected-resource/mcp\", error=\"invalid_token\", 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error_description=\"Unauthorized\""}},{"at":"2026-10-08T21:23:07.398Z","kind":"mcp_initialize","ok":true,"httpStatus":401,"latencyMs":64,"error":null,"detail":{"authRequired":true,"wwwAuthenticate":"Bearer realm=\"mcp\", resource=\"https://singlefax.com/mcp\", resource_metadata=\"https://singlefax.com/.well-known/oauth-protected-resource/mcp\", error=\"invalid_token\", error_description=\"Unauthorized\""}},{"at":"2026-10-08T14:23:11.510Z","kind":"mcp_initialize","ok":true,"httpStatus":401,"latencyMs":70,"error":null,"detail":{"authRequired":true,"wwwAuthenticate":"Bearer realm=\"mcp\", resource=\"https://singlefax.com/mcp\", resource_metadata=\"https://singlefax.com/.well-known/oauth-protected-resource/mcp\", error=\"invalid_token\", error_description=\"Unauthorized\""}},{"at":"2026-10-08T07:25:23.017Z","kind":"mcp_initialize","ok":true,"httpStatus":401,"latencyMs":71,"error":null,"detail":{"authRequired":true,"wwwAuthenticate":"Bearer realm=\"mcp\", resource=\"https://singlefax.com/mcp\", resource_metadata=\"https://singlefax.com/.well-known/oauth-protected-resource/mcp\", error=\"invalid_token\", error_description=\"Unauthorized\""}},{"at":"2026-10-08T00:27:07.493Z","kind":"mcp_initialize","ok":true,"httpStatus":401,"latencyMs":63,"error":null,"detail":{"authRequired":true,"wwwAuthenticate":"Bearer realm=\"mcp\", resource=\"https://singlefax.com/mcp\", resource_metadata=\"https://singlefax.com/.well-known/oauth-protected-resource/mcp\", error=\"invalid_token\", error_description=\"Unauthorized\""}}],"tools":null,"package":null,"toolSurface":null,"endpointFacts":[{"id":"ep_t5y226mf5enp","url":"https://singlefax.com/mcp","type":"mcp_streamable_http","factsCheckedAt":"2026-10-09T04:27:49.249Z","auth":{"observedAt":"2026-10-09T04:27:49.515Z","authRequired":true,"scheme":"Bearer","resourceMetadata":{"url":"https://singlefax.com/.well-known/oauth-protected-resource/mcp","resource":"https://singlefax.com/mcp","authorizationServers":["https://api.singlefax.com/api/auth"],"scopesSupported":["openid","profile","email","offline_access","fax:read","fax:draft","fax:send","inbox:read","credits:read"]},"authorizationServer":{"url":"https://api.singlefax.com/.well-known/oauth-authorization-server/api/auth","issuer":"https://api.singlefax.com/api/auth","grantTypesSupported":["authorization_code","client_credentials","refresh_token"],"codeChallengeMethodsSupported":["S256"],"tokenEndpointAuthMethodsSupported":["none","client_secret_basic","client_secret_post","private_key_jwt"],"dynamicClientRegistration":true,"dpopSigningAlgValuesSupported":[],"clientIdMetadataDocumentSupported":null},"conformance":{"dpop":false,"rfc8414":true,"rfc9728":true,"pkceS256":true,"clientIdMetadataDocument":false,"dynamicClientRegistration":true}},"tls":{"observedAt":"2026-10-09T04:27:49.528Z","protocol":"TLSv1.3","chainValid":true,"chainError":null,"hostMatches":true,"subject":"singlefax.com","issuer":{"commonName":"WE1","organization":"Google Trust Services"},"validFrom":"2026-10-05T18:31:28.000Z","validTo":"2027-01-03T19:31:10.000Z","daysToExpiry":85,"sanCount":3,"fingerprint256":"8B:1A:8A:22:A5:6D:F8:87:98:97:F3:C7:91:30:E7:D7:42:6C:33:86:EE:54:C1:82:BF:6B:C2:95:32:E8:9F:2D"}}]},"verification":{"claimed":false,"claimedAt":null,"proofs":[]},"provenance":{"sources":[{"source":"mcp_registry","key":"com.singlefax/mcp","url":"https://registry.modelcontextprotocol.io/v0/servers/com.singlefax%2Fmcp","firstSeenAt":"2026-09-05T21:20:36.510Z","fetchedAt":"2026-10-09T11:22:16.248Z","normalizedAt":"2026-10-09T11:22:16.248Z"}]},"firstSeenAt":"2026-09-05T21:20:36.510Z","updatedAt":"2026-09-05T21:20:49.377Z"}