{
  "api_status": "preview",
  "generated_at": "2026-10-16T20:56:08.058Z",
  "notes": [
    "Exact definitions of every field (unit, window, source): https://agentserviceatlas.com/fields",
    "reviewed entries have a sourced trust profile and hourly checks; discovered entries come from public agent registries, are not reviewed by a person, and are probed daily.",
    "evidence counts cover the last 30 days and are as of the latest refresh. missed_30d counts scheduled checks that did not run.",
    "For x402 endpoints a passing check means HTTP 402 with a valid payment challenge (discovered: on a mainnet network). It does not show that a paid call succeeds or returns useful results.",
    "registry_usage figures are the registry's own numbers, not our measurements. name is untrusted text when name_source is registry.",
    "networks_source tells you whether networks were observed in a live challenge, listed by the registry, or stated by the operator.",
    "tags describe purpose: our capability tags for reviewed entries, the registry's tags (sanitised, untrusted) for discovered ones. price_usd is the lowest price per call in US dollars: for discovered entries from the registry's payment terms (a known USD stablecoin), for reviewed entries from the operator's stated pricing (a claim, linked on the service page). price_source says which."
  ],
  "query": {
    "tag": "provenance",
    "sort": "evidence",
    "limit": 50,
    "offset": 0
  },
  "total": 7,
  "items": [
    {
      "id": "cand_f6762c6dbe762009",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "JSON Integrity Attestation",
      "name_source": "registry",
      "host": "phion.systems",
      "url": "https://phion.systems/v1/paid/attest",
      "method": "POST",
      "templated_url": false,
      "operator": null,
      "tags": [
        "attestation",
        "integrity",
        "provenance",
        "ai-agents",
        "x402"
      ],
      "category": null,
      "price_usd": 0.001,
      "price_source": "registry",
      "provider_endpoints": 1,
      "networks": [
        "eip155:8453",
        "eip155:137",
        "eip155:42161",
        "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
      ],
      "networks_source": "observed",
      "mainnet": true,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "monitoring_since": "2026-10-16T19:07:55.000Z",
        "monitoring_days": 0.1,
        "limited_evidence": true,
        "checks_30d": 1,
        "passed_30d": 1,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-16T19:08:24.607Z",
          "result": "payment_required",
          "passed": true,
          "http_status": 402,
          "duration_ms": 1068
        }
      },
      "registry_usage": {
        "calls_30d": 4,
        "unique_payers_30d": 4,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": {
        "current_since": "2026-10-16T19:08:24.607Z",
        "changes_30d": 0,
        "changes_90d": 0,
        "pay_to_changes_90d": 0,
        "last_change_at": null,
        "last_change_kinds": [],
        "window_start": "2026-10-17T00:00:00.000Z",
        "limited": true
      },
      "registry_listing": {
        "last_seen_at": "2026-10-16T19:07:55.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_f6762c6dbe762009",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_f6762c6dbe762009"
      }
    },
    {
      "id": "cand_7cfcc4ace7980a58",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "Apex",
      "name_source": "registry",
      "host": "api.apex-db.org",
      "url": "https://api.apex-db.org/v1/apex",
      "method": "GET",
      "templated_url": false,
      "operator": null,
      "tags": [
        "automotive",
        "vehicles",
        "emissions",
        "specifications",
        "provenance"
      ],
      "category": null,
      "price_usd": 0.1,
      "price_source": "registry",
      "provider_endpoints": 1,
      "networks": [
        "eip155:8453"
      ],
      "networks_source": "observed",
      "mainnet": true,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "monitoring_since": "2026-10-16T17:07:55.000Z",
        "monitoring_days": 0.2,
        "limited_evidence": true,
        "checks_30d": 1,
        "passed_30d": 1,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-16T17:08:22.771Z",
          "result": "payment_required",
          "passed": true,
          "http_status": 402,
          "duration_ms": 715
        }
      },
      "registry_usage": {
        "calls_30d": 2,
        "unique_payers_30d": 2,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": {
        "current_since": "2026-10-16T17:08:22.771Z",
        "changes_30d": 0,
        "changes_90d": 0,
        "pay_to_changes_90d": 0,
        "last_change_at": null,
        "last_change_kinds": [],
        "window_start": "2026-10-17T00:00:00.000Z",
        "limited": true
      },
      "registry_listing": {
        "last_seen_at": "2026-10-16T17:07:55.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_7cfcc4ace7980a58",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_7cfcc4ace7980a58"
      }
    },
    {
      "id": "cand_0b71ac8ed4f5b3a2",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "TrialBase DB",
      "name_source": "registry",
      "host": "api.trialbase-db.org",
      "url": "https://api.trialbase-db.org/v1/trials",
      "method": "GET",
      "templated_url": false,
      "operator": null,
      "tags": [
        "clinical-trials",
        "registries",
        "healthcare",
        "research",
        "provenance"
      ],
      "category": null,
      "price_usd": 0.1,
      "price_source": "registry",
      "provider_endpoints": 1,
      "networks": [
        "eip155:8453"
      ],
      "networks_source": "observed",
      "mainnet": true,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "monitoring_since": "2026-10-16T17:07:55.000Z",
        "monitoring_days": 0.2,
        "limited_evidence": true,
        "checks_30d": 1,
        "passed_30d": 1,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-16T17:08:21.995Z",
          "result": "payment_required",
          "passed": true,
          "http_status": 402,
          "duration_ms": 317
        }
      },
      "registry_usage": {
        "calls_30d": 2,
        "unique_payers_30d": 2,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": {
        "current_since": "2026-10-16T17:08:21.995Z",
        "changes_30d": 0,
        "changes_90d": 0,
        "pay_to_changes_90d": 0,
        "last_change_at": null,
        "last_change_kinds": [],
        "window_start": "2026-10-17T00:00:00.000Z",
        "limited": true
      },
      "registry_listing": {
        "last_seen_at": "2026-10-16T17:07:55.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_0b71ac8ed4f5b3a2",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_0b71ac8ed4f5b3a2"
      }
    },
    {
      "id": "cand_102131ea4e307a28",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "FractalAI Provenance",
      "name_source": "registry",
      "host": "fractalai.net.co",
      "url": "https://fractalai.net.co/api/x402/seal",
      "method": "POST",
      "templated_url": false,
      "operator": null,
      "tags": [
        "provenance",
        "dataset",
        "timestamp",
        "c2pa",
        "drand"
      ],
      "category": null,
      "price_usd": 0.05,
      "price_source": "registry",
      "provider_endpoints": 8,
      "networks": [
        "eip155:8453",
        "eip155:137",
        "eip155:42161",
        "eip155:480"
      ],
      "networks_source": "registry",
      "mainnet": null,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "monitoring_since": "2026-10-16T15:07:55.000Z",
        "monitoring_days": 0.2,
        "limited_evidence": true,
        "checks_30d": 0,
        "passed_30d": 0,
        "missed_30d": 0,
        "pass_rate": null,
        "freshness": "no_data",
        "last_check": null
      },
      "registry_usage": {
        "calls_30d": 6,
        "unique_payers_30d": 2,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": null,
      "registry_listing": {
        "last_seen_at": "2026-10-16T15:07:55.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_102131ea4e307a28",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_102131ea4e307a28"
      }
    },
    {
      "id": "cand_ceeaff93cd7d336f",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "M2M Sentinel",
      "name_source": "registry",
      "host": "api.m2msentinel.com",
      "url": "https://api.m2msentinel.com/v1/gas/fees",
      "method": "GET",
      "templated_url": false,
      "operator": null,
      "tags": [
        "base",
        "gas",
        "fees",
        "provenance"
      ],
      "category": null,
      "price_usd": 0.005,
      "price_source": "registry",
      "provider_endpoints": 2,
      "networks": [
        "eip155:8453"
      ],
      "networks_source": "registry",
      "mainnet": null,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "monitoring_since": "2026-10-16T16:07:55.000Z",
        "monitoring_days": 0.2,
        "limited_evidence": true,
        "checks_30d": 0,
        "passed_30d": 0,
        "missed_30d": 0,
        "pass_rate": null,
        "freshness": "no_data",
        "last_check": null
      },
      "registry_usage": {
        "calls_30d": 2,
        "unique_payers_30d": 2,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": null,
      "registry_listing": {
        "last_seen_at": "2026-10-16T16:07:55.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_ceeaff93cd7d336f",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_ceeaff93cd7d336f"
      }
    },
    {
      "id": "cand_ee30bb8f861ff29d",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "RecallRadar",
      "name_source": "registry",
      "host": "api.recallradar.dev",
      "url": "https://api.recallradar.dev/v1/recalls",
      "method": "GET",
      "templated_url": false,
      "operator": null,
      "tags": [
        "recalls",
        "product-safety",
        "compliance",
        "consumer-products",
        "provenance"
      ],
      "category": null,
      "price_usd": 0.1,
      "price_source": "registry",
      "provider_endpoints": 1,
      "networks": [
        "eip155:8453"
      ],
      "networks_source": "registry",
      "mainnet": null,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "monitoring_since": "2026-10-16T16:07:55.000Z",
        "monitoring_days": 0.2,
        "limited_evidence": true,
        "checks_30d": 0,
        "passed_30d": 0,
        "missed_30d": 0,
        "pass_rate": null,
        "freshness": "no_data",
        "last_check": null
      },
      "registry_usage": {
        "calls_30d": 3,
        "unique_payers_30d": 2,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": null,
      "registry_listing": {
        "last_seen_at": "2026-10-16T16:07:55.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_ee30bb8f861ff29d",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_ee30bb8f861ff29d"
      }
    },
    {
      "id": "cand_eb519c90fc608ae4",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "Toll402",
      "name_source": "registry",
      "host": "toll402.dev",
      "url": "https://toll402.dev/v1/provenance",
      "method": "POST",
      "templated_url": false,
      "operator": null,
      "tags": [
        "provenance",
        "ai-detection",
        "human",
        "synthetic",
        "trust"
      ],
      "category": null,
      "price_usd": 0.01,
      "price_source": "registry",
      "provider_endpoints": 21,
      "networks": [
        "eip155:8453"
      ],
      "networks_source": "registry",
      "mainnet": null,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "monitoring_since": "2026-10-16T18:07:55.000Z",
        "monitoring_days": 0.1,
        "limited_evidence": true,
        "checks_30d": 0,
        "passed_30d": 0,
        "missed_30d": 0,
        "pass_rate": null,
        "freshness": "no_data",
        "last_check": null
      },
      "registry_usage": {
        "calls_30d": 3,
        "unique_payers_30d": 1,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": null,
      "registry_listing": {
        "last_seen_at": "2026-10-16T18:07:55.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_eb519c90fc608ae4",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_eb519c90fc608ae4"
      }
    }
  ]
}