{"$schema":"https://wellknown.network/schemas/agent-record-v1.json","schemaVersion":"1","id":"ag_rt5fxa56pna9","handle":"clearsigned-verify","url":"https://wellknown.network/agents/clearsigned-verify","links":{"self":"https://wellknown.network/agents/clearsigned-verify/record.json","html":"https://wellknown.network/agents/clearsigned-verify","markdown":"https://wellknown.network/agents/clearsigned-verify/record.md","api":"https://wellknown.network/api/v1/agents/clearsigned-verify","status":"https://wellknown.network/api/v1/agents/clearsigned-verify/status","claim":"https://wellknown.network/agents/clearsigned-verify/claim","claimApi":"https://wellknown.network/api/v1/claims","claimDescriptor":"https://wellknown.network/agents/clearsigned-verify/claim.json","badge":"https://wellknown.network/agents/clearsigned-verify/badge.svg","openapi":"https://wellknown.network/openapi.json","history":"https://wellknown.network/api/v1/agents/clearsigned-verify/history","tools":"https://wellknown.network/api/v1/agents/clearsigned-verify/tools"},"ard":{"identifier":"urn:air:verify.clearsigned.com:agent:clearsigned-verify","type":"application/a2a-agent-card+json"},"kind":"agent","declared":{"name":"Clearsigned Verify","summary":"Machine-callable claim verification with no stake in the outcome. Submit a claim (and optional evidence); receive an Ed25519-signed, evidence-bearing receipt with a calibrated verdict: SUPPORTED, REFUTED, or UNVERIFIABLE. Confidence values are measured realized rates from a published calibration cu…","description":"Machine-callable claim verification with no stake in the outcome. Submit a claim (and optional evidence); receive an Ed25519-signed, evidence-bearing receipt with a calibrated verdict: SUPPORTED, REFUTED, or UNVERIFIABLE. Confidence values are measured realized rates from a published calibration curve (0.914, n=116), never model-asserted. Commit precision 0.976 on the serving stack; between 0.959 and 0.976 across five measured stacks. Every receipt and its on-chain settlement are hash-chained in a publicly auditable ledger.","publisher":{"name":"Clearsigned","url":"https://clearsigned.com"},"homepage":"https://clearsigned.com/llms.txt","repository":null,"version":"1.0.0","license":null,"protocols":["a2a"],"tags":["verification","fact-checking","x402","payments","trust"],"pricing":null,"endpoints":[{"url":"https://verify.clearsigned.com","type":"a2a","auth":"none","probeable":true}],"skills":[{"id":"verify-claim-t1","name":"Verify a claim (T1)","tags":["verification","fact-checking","x402","payments","trust"],"description":"Adversarial verification of a factual claim: live evidence gathering for and against, per-source stance judgments, a refuter pass, and a fixed confidence formula mapped through a published calibration curve. $0.05 USDC per call via x402 (Base mainnet, scheme exact). Response takes 5-20s; use a client timeout of at least 60s. Abstains (UNVERIFIABLE) rather than guesses when evidence is thin."}],"tools":["Verify a claim (T1)"],"extra":{"inputModes":["application/json"],"outputModes":["application/json"],"capabilities":{"streaming":false,"pushNotifications":false}},"attribution":{"kind":"a2a_card","name":"a2a_card","summary":"a2a_card","version":"a2a_card","description":"a2a_card","homepageUrl":"a2a_card","publisherUrl":"a2a_card","publisherName":"a2a_card"}},"derived":{"capabilities":[{"slug":"commerce.payments","name":"Payments","confidence":1,"provenance":"declared"}],"categories":["commerce"],"language":"en"},"observed":{"status":"unavailable","statusReason":"5 consecutive checks failed; never seen responding (latest 7d ago).","lastOkAt":null,"lastProbedAt":"2026-11-03T05:31:10.322Z","statusComputedAt":"2026-11-03T05:34:29.939Z","reliability30d":{"probes":4,"successRate":0,"p50Ms":85,"basis":"none","measures":{"availability":"availability","latency":"response time","tools":"not observed","summary":"No successful checks in the window."},"checks":{"total":4,"ok":0,"authBoundaryOk":0,"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":"2026-11-03T05:31:10.322Z","kind":"a2a_card","ok":false,"httpStatus":404,"latencyMs":80,"error":"http 404","detail":null},{"at":"2026-10-27T05:28:19.734Z","kind":"a2a_card","ok":false,"httpStatus":404,"latencyMs":84,"error":"http 404","detail":null},{"at":"2026-10-20T12:26:45.423Z","kind":"a2a_card","ok":false,"httpStatus":404,"latencyMs":87,"error":"http 404","detail":null},{"at":"2026-10-12T19:27:26.652Z","kind":"a2a_card","ok":false,"httpStatus":404,"latencyMs":86,"error":"http 404","detail":null},{"at":"2026-10-05T09:24:12.279Z","kind":"a2a_card","ok":false,"httpStatus":404,"latencyMs":88,"error":"http 404","detail":null},{"at":"2026-10-01T06:24:25.233Z","kind":"a2a_card","ok":false,"httpStatus":404,"latencyMs":83,"error":"http 404","detail":null},{"at":"2026-09-29T06:21:58.820Z","kind":"a2a_card","ok":false,"httpStatus":404,"latencyMs":84,"error":"http 404","detail":null},{"at":"2026-09-28T04:27:33.934Z","kind":"a2a_card","ok":false,"httpStatus":404,"latencyMs":86,"error":"http 404","detail":null},{"at":"2026-09-27T15:30:16.317Z","kind":"a2a_card","ok":false,"httpStatus":404,"latencyMs":82,"error":"http 404","detail":null}],"tools":null,"package":null,"toolSurface":null,"endpointFacts":[{"id":"ep_h7cy9smja74v","url":"https://verify.clearsigned.com","type":"a2a","factsCheckedAt":"2026-11-03T05:31:10.310Z","auth":null,"tls":{"observedAt":"2026-11-03T05:31:10.469Z","protocol":"TLSv1.3","chainValid":true,"chainError":null,"hostMatches":true,"subject":"verify.clearsigned.com","issuer":{"commonName":"YE1","organization":"Let's Encrypt"},"validFrom":"2026-10-13T18:11:16.000Z","validTo":"2027-01-11T18:11:15.000Z","daysToExpiry":62,"sanCount":1,"fingerprint256":"16:4F:81:9A:AB:64:FD:00:4F:32:FF:F1:DB:00:AF:EC:62:8C:7A:DD:F8:D7:CB:D0:8A:73:EF:DC:D8:8B:ED:5F"}}]},"verification":{"claimed":false,"claimedAt":null,"proofs":[]},"provenance":{"sources":[{"source":"a2a_card","key":"https://clearsigned.com/.well-known/agent.json","url":"https://clearsigned.com/.well-known/agent.json","firstSeenAt":"2026-09-27T15:24:33.154Z","fetchedAt":"2026-10-30T22:23:15.412Z","normalizedAt":"2026-10-30T22:23:15.412Z"}]},"firstSeenAt":"2026-09-27T15:24:33.154Z","updatedAt":"2026-09-27T15:24:33.177Z"}