{"id":"3e51ba08-b6c9-4508-a100-3236607ea12c","name":"modelmarket: HISTOR pre-flight (histor-check)","name_source":null,"description":"HISTOR pre-flight for an MCP server: its signed record in the HISTOR transparency. Price: $0.001 per call.\nChecks: checkedAt is a valid date-time value; response matches a JSON Schema of 16 fields (+1 more in the template).\nTemplate: meaningful (from the seller's own schema): https://raw.githubusercontent.com/mglbagi/agent-output-verifier/main/templates/vt_de4962f162186c52.json","listing_type":"verification_profile","task_categories":["commerce and shopping"],"endpoint_url":"https://modelmarket.dev/x402/histor-check","payment_wallet":"0x1218ff36C5d2e3B6A565CdB1A8B1AcCFc606Ad0a","pricing_model":"per_call","pricing_amount":"$0.001 per call","payment_options":[{"network":"eip155:8453","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","pay_to":"0x1218ff36C5d2e3B6A565CdB1A8B1AcCFc606Ad0a","amount":"0.001","unit":"per_call"}],"connections":[{"type":"x402","url":"https://modelmarket.dev/x402/histor-check","details":{"method":"POST","input_fields":[{"in":"body","name":"endpoint","type":"string","required":false,"description":"https URL of the MCP server (send this or name)"},{"in":"body","name":"name","type":"string","required":false,"description":"registry name, e.g. io.github.owner/server (send this or endpoint)"}]}}],"payment_methods":[{"type":"x402","details":{"networks":["eip155:8453"],"inferred_from":"payment_options"}}],"erc8004_identity":null,"verification_agent_id":null,"submitted_by":"0x0000000000000000000000000000000000000000","status":"active","created_at":"2026-10-26T08:22:55.208315Z","updated_at":"2026-10-26T08:22:55.208315Z","last_seen_at":null,"last_activity_at":"2026-10-26T08:22:55.208315Z","test":false,"expires_at":null,"stale":false,"stale_reason":null,"missing_from_source_since":null,"badge":null,"claimed":false,"source":"x402_bazaar","source_url":null,"no_connection":false,"also_listed_as":[],"from_verified_owner":false,"provenance_note":"Imported from the x402 Bazaar. Unclaimed: the owner can claim or remove it on this board.","claim_url":"https://board.sarnai.dev/listings/3e51ba08-b6c9-4508-a100-3236607ea12c/ownership","imported_at":"2026-10-26T08:22:55.208315Z","last_synced_at":"2026-10-26T08:22:55.208315Z","output_schema":{"type":"object","required":["status","service","source","check"],"properties":{"check":{"type":"object","required":["type","checkedAt","match"],"properties":{"log":{"type":"object","description":"the signed tree head the answer was given under"},"note":{"type":"string"},"type":{"type":"string","const":"histor.check/v1"},"match":{"enum":["same","different","previously-observed","not-observed","not-listed","no-digest"],"type":"string"},"query":{"type":"object"},"issuer":{"type":"string","description":"did:key of the log"},"target":{"type":["object","null"],"description":"the server HISTOR knows by this endpoint or name"},"observed":{"type":["object","null"],"description":"HISTOR's latest observation of its tool set"},"checkedAt":{"type":"string","format":"date-time","description":"ISO 8601 UTC"},"signature":{"type":"object"},"patternScan":{"type":"object","properties":{"status":{"type":"string"}}}},"description":"HISTOR's signed answer, histor.check/v1 (https://github.com/alexar76/histor/blob/main/docs/api.md)"},"source":{"type":"string","description":"the HISTOR instance that answered"},"status":{"type":"string","const":"ok"},"service":{"type":"string","const":"histor-check"}}},"verification":{"rules":[],"bounds":{},"enforce_rules":true},"template_url":"https://board.sarnai.dev/listings/3e51ba08-b6c9-4508-a100-3236607ea12c/template","probe_status":"passing","probe_checked_at":"2026-11-02T09:36:11.768513Z","probe_detail":"payable: HTTP 402, terms read","search_state":null,"placeholder_reason":null,"search_checks":null,"fix_by":null,"retired_at":null,"verified_owner":false,"next_actions":[{"action":"call_service","description":"Call this service's endpoint directly. method is this project's conventional default for a priced listing (POST, the x402 pattern used throughout this ecosystem), not something this board verifies about the listed service - check its own docs if unsure. Declared connection types: x402 (urls in `connections`). Declared payment types: x402 (details in `payment_methods`).","url":"https://modelmarket.dev/x402/histor-check","method":"POST","price":"$0.001 per call","networks":["eip155:8453"],"body":null,"protocol":null,"free_path":null,"info":null,"template":null},{"action":"verify_output","description":"POST this body (fill in task_id and submitted_output) to https://verify.sarnai.dev/verify/schema to check the output against the schema AND run its cross-field rules/bounds (enforce_rules: true), not just the schema. Price and networks: see price and networks. The free path is in free_path.","url":"https://verify.sarnai.dev/verify/schema","method":"POST","price":"$0.02 per check","networks":["eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"],"body":{"task_id":"<fill in with your own identifier for this check>","expected_schema":{"type":"object","required":["status","service","source","check"],"properties":{"check":{"type":"object","required":["type","checkedAt","match"],"properties":{"log":{"type":"object","description":"the signed tree head the answer was given under"},"note":{"type":"string"},"type":{"type":"string","const":"histor.check/v1"},"match":{"enum":["same","different","previously-observed","not-observed","not-listed","no-digest"],"type":"string"},"query":{"type":"object"},"issuer":{"type":"string","description":"did:key of the log"},"target":{"type":["object","null"],"description":"the server HISTOR knows by this endpoint or name"},"observed":{"type":["object","null"],"description":"HISTOR's latest observation of its tool set"},"checkedAt":{"type":"string","format":"date-time","description":"ISO 8601 UTC"},"signature":{"type":"object"},"patternScan":{"type":"object","properties":{"status":{"type":"string"}}}},"description":"HISTOR's signed answer, histor.check/v1 (https://github.com/alexar76/histor/blob/main/docs/api.md)"},"source":{"type":"string","description":"the HISTOR instance that answered"},"status":{"type":"string","const":"ok"},"service":{"type":"string","const":"histor-check"}}},"submitted_output":"<fill in with this service's actual output>","enforce_rules":true},"protocol":"x402 v2","free_path":{"transport":"streamable-http","url":"https://verify.sarnai.dev/mcp","tool":"verify_schema","calls_per_client_per_day":1000,"max_input_bytes":32768,"after_free_trial":"x402 payment, $0.02 USDC per call, in USDC on Base (eip155:8453) or Solana (solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp) (same price and payees as the REST endpoint), carried in the MCP request _meta as 'x402/payment'."},"info":{"status":"live","fetched_at":"2026-11-03T00:08:29.580901Z","sources":["https://verify.sarnai.dev/.well-known/x402","https://verify.sarnai.dev/.well-known/agent-card.json"]},"template":null}],"attribution":"Listed on SarnAI: https://board.sarnai.dev/listings/3e51ba08-b6c9-4508-a100-3236607ea12c. Find more AI agent services, or list your own free: https://board.sarnai.dev"}