{"id":576512,"name":"tithonus","description":"Signed time, Bitcoin-anchored notarisation and drand randomness for agents. No account, no key. Send one command as text: now, stamp <text>, check <link> <text>, lookup <sha256>, beacon.","card_url":"https://tithonus.org/.well-known/agent-card.json","endpoint":"https://tithonus.org/a2a","protocol_version":"1.0","first_seen":"2026-11-08T22:29:47.353673+00:00","last_verified":"2026-11-08T22:29:47.353673+00:00","card":{"url":"https://tithonus.org/a2a","name":"tithonus","skills":[{"id":"now","name":"Signed time","tags":["time","clock","signed","drand"],"examples":["now","now my-nonce-123"],"description":"Signed current UTC time, including the latest drand round, so it provably was made after it."},{"id":"stamp","name":"Notarise","tags":["notarise","timestamp","proof","receipt","bitcoin"],"examples":["stamp my prediction: X wins","ts 9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08"],"description":"Prove text existed by now. The server salts and hashes it (text is not stored) and returns a receipt link. Put a token from 'beacon' in the text to also prove it was written after that moment."},{"id":"check","name":"Check a receipt","tags":["verify","receipt","proof"],"examples":["check https://tithonus.org/r/abcdef0123456789abcd.0123456789abcdef my prediction: X wins"],"description":"Is a receipt genuine, and is your text exactly what it covers? Plain match or no match."},{"id":"lookup","name":"Look up a hash","tags":["lookup","hash","receipt"],"examples":["lookup 9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08"],"description":"Earliest receipt for a sha256 and its Bitcoin anchoring status. Never creates a stamp."},{"id":"beacon","name":"Public randomness","tags":["randomness","drand","fair","lottery"],"examples":["beacon","beacon 33314113"],"description":"drand randomness (League of Entropy), relayed and signed. Nobody can predict or choose it. Includes a token for 'written after' proofs."}],"version":"3.6.0","provider":{"url":"https://tithonus.org/","organization":"tithonus.org"},"description":"Signed time, Bitcoin-anchored notarisation and drand randomness for agents. No account, no key. Send one command as text: now, stamp <text>, check <link> <text>, lookup <sha256>, beacon.","capabilities":{"streaming":false,"extendedAgentCard":false,"pushNotifications":false},"protocolVersion":"0.3.0","documentationUrl":"https://tithonus.org/","defaultInputModes":["text/plain","application/json"],"defaultOutputModes":["text/plain"],"preferredTransport":"JSONRPC","supportedInterfaces":[{"url":"https://tithonus.org/a2a","protocolBinding":"JSONRPC","protocolVersion":"1.0"},{"url":"https://tithonus.org/a2a","protocolBinding":"JSONRPC","protocolVersion":"0.3"}]},"status":"verified","publisher_domain":"tithonus.org","signature_status":"unsigned","signature_detail":"No card signature supplied","signature_key_url":null,"signature_checked_at":"2026-11-08T22:29:47.353673+00:00","domain_claimed_at":null,"domain_proof_checked_at":null,"source_name":"Publisher Agent Card","source_url":"https://tithonus.org/.well-known/agent-card.json","last_check":{"checked_at":"2026-11-08T22:29:47.353673+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},"also_published_at":[],"history_urls":["https://tithonus.org/.well-known/agent-card.json"],"skills":[{"skill_id":"check","name":"Check a receipt","description":"Is a receipt genuine, and is your text exactly what it covers? Plain match or no match.","tags":["verify","receipt","proof"],"quality_warning":false},{"skill_id":"lookup","name":"Look up a hash","description":"Earliest receipt for a sha256 and its Bitcoin anchoring status. Never creates a stamp.","tags":["lookup","hash","receipt"],"quality_warning":false},{"skill_id":"stamp","name":"Notarise","description":"Prove text existed by now. The server salts and hashes it (text is not stored) and returns a receipt link. Put a token from 'beacon' in the text to also prove it was written after that moment.","tags":["notarise","timestamp","proof","receipt","bitcoin"],"quality_warning":false},{"skill_id":"beacon","name":"Public randomness","description":"drand randomness (League of Entropy), relayed and signed. Nobody can predict or choose it. Includes a token for 'written after' proofs.","tags":["randomness","drand","fair","lottery"],"quality_warning":false},{"skill_id":"now","name":"Signed time","description":"Signed current UTC time, including the latest drand round, so it provably was made after it.","tags":["time","clock","signed","drand"],"quality_warning":false}],"quality_flags":[],"check_history":{"checks":1,"passed":1},"recent_checks":[{"card_url":"https://tithonus.org/.well-known/agent-card.json","checked_at":"2026-11-08T22:29:47.353673+00:00","success":true,"http_status":200,"detail":"Agent Card validated"}],"endpoint_tls_check":{"checked_at":"2026-11-08T22:29:47.353673+00:00","success":true,"detail":"Valid TLS connection to advertised endpoint host; no A2A request sent"},"protocol_check":{"checked_at":"2026-11-08T22:29:47.353673+00:00","endpoint":"https://tithonus.org/a2a","protocol_binding":"JSONRPC","protocol_version":"1.0","state":"a2a_response","http_status":200,"detail":"A2A task-not-found response to a read-only task lookup","request_diagnostics":{"requests":[{"path":"/a2a","allow":[],"method":"POST","status":200,"version_header":"1.0","protocol_method":"GetTask","redirect_followed":false}],"capture_version":1}},"declared_primary_endpoint":"https://tithonus.org/a2a","selected_connection_interface":{"url":"https://tithonus.org/a2a","protocolBinding":"JSONRPC","protocolVersion":"1.0"},"protocol_interface_checks":[{"endpoint":"https://tithonus.org/a2a","protocol_binding":"JSONRPC","protocol_version":"1.0","selected":true,"state":"a2a_response","checked_at":"2026-11-08T22:29:47.353673+00:00","http_status":200,"detail":"A2A task-not-found response to a read-only task lookup","binding_recorded":true},{"endpoint":"https://tithonus.org/a2a","protocol_binding":"JSONRPC","protocol_version":"0.3","selected":false,"state":"a2a_response","checked_at":"2026-11-08T22:29:47.353673+00:00","http_status":200,"detail":"A2A task-not-found response to a read-only task lookup","binding_recorded":true},{"endpoint":"https://tithonus.org/a2a","protocol_binding":"JSONRPC","protocol_version":"0.3.0","selected":false,"state":"a2a_response","checked_at":"2026-11-08T22:29:47.353673+00:00","http_status":200,"detail":"A2A task-not-found response to a read-only task lookup","binding_recorded":true}],"connection_selection_note":"The selected connection uses an address advertised in the publisher card. Read-only observations do not establish task quality or safety.","x402_price_check":null,"events":[],"relationships":[],"verification":{"agent_card_url":"https://tithonus.org/.well-known/agent-card.json","last_successful_card_check":"2026-11-08T22:29:47.353673+00:00","latest_card_check":{"checked_at":"2026-11-08T22:29:47.353673+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},"signature_status":"unsigned","signature_checked_at":"2026-11-08T22:29:47.353673+00:00","task_endpoint_tested":true,"task_execution_tested":false,"endpoint_tls_checked_at":"2026-11-08T22:29:47.353673+00:00","endpoint_tls_reachable":true,"protocol_check_state":"a2a_response","protocol_checked_at":"2026-11-08T22:29:47.353673+00:00","provider_identity_verified":false,"domain_claimed_at":null,"domain_proof_checked_at":null},"synthetic_capability_tests":{"agent_id":576512,"status":"not_tested","reason_code":"not_yet_tested","consent_status":"not_confirmed","latest_observation_status":null,"last_checked_at":null,"fixture_version":"1","reference_demonstration":false,"scope":"A publisher-authorized synthetic test of a dedicated free test endpoint. It does not establish general capability, production task success, safety, ownership, identity, or the behaviour of the advertised A2A endpoint.","methodology_url":"https://localmark.ai/capability-tests","history":[]},"repair_links":{"agent_repair_url":"https://localmark.ai/agents/576512/repair","publisher_report_url":"https://localmark.ai/publishers/tithonus.org/repair","diagnostics_json_url":"https://localmark.ai/publishers/tithonus.org/repair/diagnostics.json","diagnostics_csv_url":"https://localmark.ai/publishers/tithonus.org/repair/diagnostics.csv"},"_localmark":{"contribution":{"optional":true,"directory_access":"free","operator_authorization_required":true,"affects_rankings":false,"message":"LocalMark is free. Optional contributions help fund ongoing checks.","support_url":"https://localmark.ai/support","metadata_url":"https://localmark.ai/api/v1/support/contributions"}}}