{"id":545080,"name":"402xAgent","description":"Check an x402 endpoint before your agent pays: pay, skip or recheck, with Ed25519-signed receipts.","card_url":"https://402xagent.com/.well-known/agent-card.json","endpoint":"https://api.402xagent.com","protocol_version":"1.0","first_seen":"2026-11-04T21:57:39.700696+00:00","last_verified":"2026-11-04T21:57:39.700696+00:00","card":{"name":"402xAgent","skills":[{"id":"free-check","name":"Free x402 pre-payment check","tags":["x402","payments","pre-payment check","free"],"examples":["https://api.402xagent.com/v1/products/endpoint-spot-check?url=https://api.402rates.com/v1/ping","Should my agent pay https://api.402rates.com/v1/ping?"],"inputModes":["application/json","text/plain"],"description":"GET https://api.402xagent.com/v1/products/endpoint-spot-check?url=<endpoint> probes a public x402 endpoint once without paying it and answers pay, skip or recheck with a stable reason_code, the price quoted in its live 402 versus the listing, and an Ed25519-signed receipt. 5 free checks per client per UTC day (at most 25 per network); add &mode=dry-run for a free dry run that never approves a payment. Also the MCP tool endpoint_spot_check at https://api.402xagent.com/mcp.","outputModes":["application/json"]},{"id":"spot-check","name":"Paid spot-check with full payment terms","tags":["x402","payments","spot-check","paid","USDC","Base"],"examples":["https://api.402xagent.com/v1/products/endpoint-spot-check?url=https://api.402rates.com/v1/ping&pay_to=0x...&network=eip155:8453"],"inputModes":["application/json","text/plain"],"description":"The same check after the free quota: HTTP 402, $0.02 USDC on Base via x402 (exact scheme, amount 20000). Never pays the target. Adds the full payment details to the verdict (the exact payment terms, pay_to and deadline); optional claimed_price, pay_to, network and quote turn a mismatch into skip or recheck. Rules and reason codes: https://402xagent.com/rules.json.","outputModes":["application/json"]}],"iconUrl":"https://402xagent.com/logo-400.png","version":"0.64.0","provider":{"url":"https://402xagent.com","organization":"402xAgent"},"description":"Check an x402 endpoint before your agent pays: pay, skip or recheck, with Ed25519-signed receipts.","capabilities":{"streaming":false,"extendedAgentCard":false,"pushNotifications":false},"documentationUrl":"https://402xagent.com/docs","defaultInputModes":["application/json","text/plain"],"defaultOutputModes":["application/json"],"supportedInterfaces":[{"url":"https://api.402xagent.com","protocolBinding":"HTTP+JSON","protocolVersion":"1.0"}]},"status":"verified","publisher_domain":"402xagent.com","signature_status":"unsigned","signature_detail":"No card signature supplied","signature_key_url":null,"signature_checked_at":"2026-11-04T21:57:39.700696+00:00","domain_claimed_at":null,"domain_proof_checked_at":null,"source_name":"Publisher Agent Card","source_url":"https://402xagent.com/.well-known/agent-card.json","last_check":{"checked_at":"2026-11-04T21:57:39.700696+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},"also_published_at":[],"history_urls":["https://402xagent.com/.well-known/agent-card.json"],"skills":[{"skill_id":"free-check","name":"Free x402 pre-payment check","description":"GET https://api.402xagent.com/v1/products/endpoint-spot-check?url=<endpoint> probes a public x402 endpoint once without paying it and answers pay, skip or recheck with a stable reason_code, the price quoted in its live 402 versus the listing, and an Ed25519-signed receipt. 5 free checks per client per UTC day (at most 25 per network); add &mode=dry-run for a free dry run that never approves a payment. Also the MCP tool endpoint_spot_check at https://api.402xagent.com/mcp.","tags":["x402","payments","pre-payment check","free"],"quality_warning":false},{"skill_id":"spot-check","name":"Paid spot-check with full payment terms","description":"The same check after the free quota: HTTP 402, $0.02 USDC on Base via x402 (exact scheme, amount 20000). Never pays the target. Adds the full payment details to the verdict (the exact payment terms, pay_to and deadline); optional claimed_price, pay_to, network and quote turn a mismatch into skip or recheck. Rules and reason codes: https://402xagent.com/rules.json.","tags":["x402","payments","spot-check","paid","USDC","Base"],"quality_warning":false}],"quality_flags":[],"check_history":{"checks":1,"passed":1},"recent_checks":[{"card_url":"https://402xagent.com/.well-known/agent-card.json","checked_at":"2026-11-04T21:57:39.700696+00:00","success":true,"http_status":200,"detail":"Agent Card validated"}],"endpoint_tls_check":{"checked_at":"2026-11-04T21:57:39.700696+00:00","success":true,"detail":"Valid TLS connection to advertised endpoint host; no A2A request sent"},"protocol_check":{"checked_at":"2026-11-04T21:57:39.700696+00:00","endpoint":"https://api.402xagent.com","protocol_binding":"HTTP+JSON","protocol_version":"1.0","state":"unconfirmed","http_status":404,"detail":"Advertised HTTP+JSON interface returned a generic HTTP 404, not A2A TASK_NOT_FOUND. Publish the A2A service base URL with its standard task route; an ordinary REST resource URL does not establish A2A support","request_diagnostics":{"requests":[{"path":"/tasks/localmark-probe-3da4ec4e-0e08-4cdc-9b3c-23ab88485313","allow":[],"method":"GET","status":404,"version_header":"1.0","protocol_method":null,"redirect_followed":false}],"capture_version":1}},"declared_primary_endpoint":"https://api.402xagent.com","selected_connection_interface":{"url":"https://api.402xagent.com","protocolBinding":"HTTP+JSON","protocolVersion":"1.0"},"protocol_interface_checks":[{"endpoint":"https://api.402xagent.com","protocol_binding":"HTTP+JSON","protocol_version":"1.0","selected":true,"state":"unconfirmed","checked_at":"2026-11-04T21:57:39.700696+00:00","http_status":404,"detail":"Advertised HTTP+JSON interface returned a generic HTTP 404, not A2A TASK_NOT_FOUND. Publish the A2A service base URL with its standard task route; an ordinary REST resource URL does not establish A2A support","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://402xagent.com/.well-known/agent-card.json","last_successful_card_check":"2026-11-04T21:57:39.700696+00:00","latest_card_check":{"checked_at":"2026-11-04T21:57:39.700696+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},"signature_status":"unsigned","signature_checked_at":"2026-11-04T21:57:39.700696+00:00","task_endpoint_tested":true,"task_execution_tested":false,"endpoint_tls_checked_at":"2026-11-04T21:57:39.700696+00:00","endpoint_tls_reachable":true,"protocol_check_state":"unconfirmed","protocol_checked_at":"2026-11-04T21:57:39.700696+00:00","provider_identity_verified":false,"domain_claimed_at":null,"domain_proof_checked_at":null},"synthetic_capability_tests":{"agent_id":545080,"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/545080/repair","publisher_report_url":"https://localmark.ai/publishers/402xagent.com/repair","diagnostics_json_url":"https://localmark.ai/publishers/402xagent.com/repair/diagnostics.json","diagnostics_csv_url":"https://localmark.ai/publishers/402xagent.com/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"}}}