{
  "api_status": "preview",
  "generated_at": "2026-10-17T03:26:59.858Z",
  "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 hourly to monthly depending on usage (schedule/1; see evidence.schedule_tier).",
    "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": "deliverability",
    "sort": "evidence",
    "limit": 50,
    "offset": 0
  },
  "total": 25,
  "items": [
    {
      "id": "cand_fc3e11f7519d7f99",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "Agent Utility Suite",
      "name_source": "registry",
      "host": "x402-agent-api.onrender.com",
      "url": "https://x402-agent-api.onrender.com/api/v1/email-verify",
      "method": "POST",
      "templated_url": false,
      "operator": null,
      "tags": [
        "email",
        "email-verification",
        "lead-enrichment",
        "deliverability",
        "dns"
      ],
      "category": null,
      "price_usd": 0.001,
      "price_source": "registry",
      "provider_endpoints": 33,
      "networks": [
        "eip155:8453"
      ],
      "networks_source": "observed",
      "payment_protocols": [
        "x402"
      ],
      "mainnet": true,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T02:30:25.000Z",
        "monitoring_days": 0,
        "limited_evidence": true,
        "checks_30d": 1,
        "passed_30d": 1,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-17T03:05:59.169Z",
          "result": "payment_required",
          "passed": true,
          "http_status": 402,
          "duration_ms": 115
        }
      },
      "registry_usage": {
        "calls_30d": 6,
        "unique_payers_30d": 5,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": {
        "current_since": "2026-10-17T03:05:59.169Z",
        "changes_30d": 0,
        "changes_90d": 0,
        "pay_to_changes_90d": 0,
        "last_change_at": null,
        "last_change_kinds": [],
        "window_start": "2026-10-17T02:30:25.000Z",
        "limited": true
      },
      "registry_listing": {
        "last_seen_at": "2026-10-17T02:30:25.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_fc3e11f7519d7f99",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_fc3e11f7519d7f99"
      }
    },
    {
      "id": "cand_6c2d30970e832e51",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "NetIntel",
      "name_source": "registry",
      "host": "netintel.dev",
      "url": "https://netintel.dev/email-intel/analyze",
      "method": "GET",
      "templated_url": false,
      "operator": null,
      "tags": [
        "email-security",
        "spf-dkim-dmarc",
        "email-verification",
        "deliverability",
        "email-intelligence"
      ],
      "category": null,
      "price_usd": 0.005,
      "price_source": "registry",
      "provider_endpoints": 87,
      "networks": [
        "eip155:8453",
        "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
      ],
      "networks_source": "observed",
      "payment_protocols": [
        "x402"
      ],
      "mainnet": true,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-16T17:07:55.000Z",
        "monitoring_days": 0.4,
        "limited_evidence": true,
        "checks_30d": 1,
        "passed_30d": 1,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-17T02:40:53.526Z",
          "result": "payment_required",
          "passed": true,
          "http_status": 402,
          "duration_ms": 157
        }
      },
      "registry_usage": {
        "calls_30d": 6,
        "unique_payers_30d": 5,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": {
        "current_since": "2026-10-17T02:40:53.526Z",
        "changes_30d": 0,
        "changes_90d": 0,
        "pay_to_changes_90d": 0,
        "last_change_at": null,
        "last_change_kinds": [],
        "window_start": "2026-10-16T17:07:55.000Z",
        "limited": true
      },
      "registry_listing": {
        "last_seen_at": "2026-10-16T17:07:55.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_6c2d30970e832e51",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_6c2d30970e832e51"
      }
    },
    {
      "id": "cand_3b6ff17bdd83e0fb",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "Email validate",
      "name_source": "registry",
      "host": "agent402.tools",
      "url": "https://agent402.tools/api/email-validate",
      "method": "POST",
      "templated_url": false,
      "operator": null,
      "tags": [
        "validation",
        "email",
        "validate",
        "mx",
        "deliverability"
      ],
      "category": null,
      "price_usd": 0.001,
      "price_source": "registry",
      "provider_endpoints": 205,
      "networks": [
        "eip155:8453",
        "eip155:137",
        "eip155:42161",
        "eip155:143",
        "eip155:43114",
        "eip155:1329",
        "eip155:10",
        "eip155:4663",
        "eip155:42220",
        "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "stellar:pubnet",
        "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8="
      ],
      "networks_source": "observed",
      "payment_protocols": [],
      "mainnet": true,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T01:07:46.000Z",
        "monitoring_days": 0.1,
        "limited_evidence": true,
        "checks_30d": 1,
        "passed_30d": 1,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-17T01:08:00.876Z",
          "result": "payment_required",
          "passed": true,
          "http_status": 402,
          "duration_ms": 180
        }
      },
      "registry_usage": {
        "calls_30d": 5,
        "unique_payers_30d": 4,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": {
        "current_since": "2026-10-17T01:08:00.876Z",
        "changes_30d": 0,
        "changes_90d": 0,
        "pay_to_changes_90d": 0,
        "last_change_at": null,
        "last_change_kinds": [],
        "window_start": "2026-10-17T01:07:46.000Z",
        "limited": true
      },
      "registry_listing": {
        "last_seen_at": "2026-10-17T01:07:46.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_3b6ff17bdd83e0fb",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_3b6ff17bdd83e0fb"
      }
    },
    {
      "id": "cand_331d476436c9a0f2",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "SPF check",
      "name_source": "registry",
      "host": "agent402.tools",
      "url": "https://agent402.tools/api/spf-check",
      "method": "POST",
      "templated_url": false,
      "operator": null,
      "tags": [
        "network",
        "spf",
        "email",
        "email-auth",
        "deliverability"
      ],
      "category": null,
      "price_usd": 0.001,
      "price_source": "registry",
      "provider_endpoints": 205,
      "networks": [
        "eip155:8453",
        "eip155:137",
        "eip155:42161",
        "eip155:143",
        "eip155:43114",
        "eip155:1329",
        "eip155:10",
        "eip155:4663",
        "eip155:42220",
        "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "stellar:pubnet",
        "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8="
      ],
      "networks_source": "observed",
      "payment_protocols": [],
      "mainnet": true,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T01:07:46.000Z",
        "monitoring_days": 0.1,
        "limited_evidence": true,
        "checks_30d": 1,
        "passed_30d": 1,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-17T01:08:00.793Z",
          "result": "payment_required",
          "passed": true,
          "http_status": 402,
          "duration_ms": 177
        }
      },
      "registry_usage": {
        "calls_30d": 5,
        "unique_payers_30d": 4,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": {
        "current_since": "2026-10-17T01:08:00.793Z",
        "changes_30d": 0,
        "changes_90d": 0,
        "pay_to_changes_90d": 0,
        "last_change_at": null,
        "last_change_kinds": [],
        "window_start": "2026-10-17T01:07:46.000Z",
        "limited": true
      },
      "registry_listing": {
        "last_seen_at": "2026-10-17T01:07:46.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_331d476436c9a0f2",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_331d476436c9a0f2"
      }
    },
    {
      "id": "cand_c3615f52f7256800",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "eu-verify",
      "name_source": "registry",
      "host": "data.greeneris.io",
      "url": "https://data.greeneris.io/v1/validate/email",
      "method": "GET",
      "templated_url": false,
      "operator": null,
      "tags": [
        "email",
        "verification",
        "deliverability",
        "mx",
        "leads"
      ],
      "category": null,
      "price_usd": 0.005,
      "price_source": "registry",
      "provider_endpoints": 31,
      "networks": [
        "eip155:8453"
      ],
      "networks_source": "observed",
      "payment_protocols": [],
      "mainnet": true,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-16T18:07:55.000Z",
        "monitoring_days": 0.4,
        "limited_evidence": true,
        "checks_30d": 1,
        "passed_30d": 1,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-17T02:25:47.430Z",
          "result": "payment_required",
          "passed": true,
          "http_status": 402,
          "duration_ms": 185
        }
      },
      "registry_usage": {
        "calls_30d": 4,
        "unique_payers_30d": 4,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": {
        "current_since": "2026-10-17T02:25:47.430Z",
        "changes_30d": 0,
        "changes_90d": 0,
        "pay_to_changes_90d": 0,
        "last_change_at": null,
        "last_change_kinds": [],
        "window_start": "2026-10-16T18:07:55.000Z",
        "limited": true
      },
      "registry_listing": {
        "last_seen_at": "2026-10-16T18:07:55.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_c3615f52f7256800",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_c3615f52f7256800"
      }
    },
    {
      "id": "cand_e715a991033b2805",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "DNS Doctor",
      "name_source": "registry",
      "host": "dnsdoctor.dev",
      "url": "https://dnsdoctor.dev/api/v1/bulk-scan",
      "method": "POST",
      "templated_url": false,
      "operator": null,
      "tags": [
        "dns",
        "dmarc",
        "spf",
        "email-security",
        "deliverability"
      ],
      "category": null,
      "price_usd": 0.01,
      "price_source": "registry",
      "provider_endpoints": 1,
      "networks": [
        "eip155:8453"
      ],
      "networks_source": "observed",
      "payment_protocols": [
        "x402"
      ],
      "mainnet": true,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-16T14:07:55.000Z",
        "monitoring_days": 0.6,
        "limited_evidence": true,
        "checks_30d": 1,
        "passed_30d": 1,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-17T03:01:13.237Z",
          "result": "payment_required",
          "passed": true,
          "http_status": 402,
          "duration_ms": 430
        }
      },
      "registry_usage": {
        "calls_30d": 3,
        "unique_payers_30d": 3,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": {
        "current_since": "2026-10-17T03:01:13.237Z",
        "changes_30d": 0,
        "changes_90d": 0,
        "pay_to_changes_90d": 0,
        "last_change_at": null,
        "last_change_kinds": [],
        "window_start": "2026-10-16T15:44:38.000Z",
        "limited": true
      },
      "registry_listing": {
        "last_seen_at": "2026-10-16T14:07:55.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_e715a991033b2805",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_e715a991033b2805"
      }
    },
    {
      "id": "cand_005f523416293082",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "Email Validate API",
      "name_source": "registry",
      "host": "tools.ipintel.ai",
      "url": "https://tools.ipintel.ai/email-validate",
      "method": "POST",
      "templated_url": false,
      "operator": null,
      "tags": [
        "email-validation",
        "deliverability",
        "lead-verification",
        "contact-data",
        "risk-scoring"
      ],
      "category": null,
      "price_usd": 0.004,
      "price_source": "registry",
      "provider_endpoints": 9,
      "networks": [
        "eip155:8453"
      ],
      "networks_source": "observed",
      "payment_protocols": [
        "x402"
      ],
      "mainnet": true,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T02:15:47.000Z",
        "monitoring_days": 0,
        "limited_evidence": true,
        "checks_30d": 1,
        "passed_30d": 1,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-17T02:51:08.316Z",
          "result": "payment_required",
          "passed": true,
          "http_status": 402,
          "duration_ms": 275
        }
      },
      "registry_usage": {
        "calls_30d": 4,
        "unique_payers_30d": 3,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": {
        "current_since": "2026-10-17T02:51:08.316Z",
        "changes_30d": 0,
        "changes_90d": 0,
        "pay_to_changes_90d": 0,
        "last_change_at": null,
        "last_change_kinds": [],
        "window_start": "2026-10-17T02:15:47.000Z",
        "limited": true
      },
      "registry_listing": {
        "last_seen_at": "2026-10-17T02:15:47.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_005f523416293082",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_005f523416293082"
      }
    },
    {
      "id": "cand_10026fe65ef4a7b0",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "Email Verification SMTP",
      "name_source": "registry",
      "host": "agentsvc.io",
      "url": "https://agentsvc.io/api/v1/proxy/email-verify",
      "method": "POST",
      "templated_url": false,
      "operator": null,
      "tags": [
        "email",
        "email-verification",
        "deliverability",
        "smtp",
        "lead"
      ],
      "category": null,
      "price_usd": 0.0025,
      "price_source": "registry",
      "provider_endpoints": 70,
      "networks": [
        "eip155:8453",
        "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "eip155:137",
        "eip155:42161"
      ],
      "networks_source": "observed",
      "payment_protocols": [
        "x402"
      ],
      "mainnet": true,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T02:45:25.000Z",
        "monitoring_days": 0,
        "limited_evidence": true,
        "checks_30d": 1,
        "passed_30d": 1,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-17T03:25:53.707Z",
          "result": "payment_required",
          "passed": true,
          "http_status": 402,
          "duration_ms": 394
        }
      },
      "registry_usage": {
        "calls_30d": 12,
        "unique_payers_30d": 3,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": {
        "current_since": "2026-10-17T03:25:53.707Z",
        "changes_30d": 0,
        "changes_90d": 0,
        "pay_to_changes_90d": 0,
        "last_change_at": null,
        "last_change_kinds": [],
        "window_start": "2026-10-17T02:45:25.000Z",
        "limited": true
      },
      "registry_listing": {
        "last_seen_at": "2026-10-17T02:45:25.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_10026fe65ef4a7b0",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_10026fe65ef4a7b0"
      }
    },
    {
      "id": "cand_3476bb76891f7d38",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "HubVibe",
      "name_source": "registry",
      "host": "hubvibe-io.com",
      "url": "https://hubvibe-io.com/work/email/verify",
      "method": "POST",
      "templated_url": false,
      "operator": null,
      "tags": [
        "email-verification",
        "email-validation",
        "deliverability",
        "disposable-email",
        "lead-validation"
      ],
      "category": null,
      "price_usd": 0.02,
      "price_source": "registry",
      "provider_endpoints": 30,
      "networks": [
        "eip155:8453",
        "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
      ],
      "networks_source": "observed",
      "payment_protocols": [
        "x402",
        "mpp"
      ],
      "mainnet": true,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T02:30:25.000Z",
        "monitoring_days": 0,
        "limited_evidence": true,
        "checks_30d": 1,
        "passed_30d": 1,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-17T03:05:57.004Z",
          "result": "payment_required",
          "passed": true,
          "http_status": 402,
          "duration_ms": 160
        }
      },
      "registry_usage": {
        "calls_30d": 3,
        "unique_payers_30d": 3,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": {
        "current_since": "2026-10-17T03:05:57.004Z",
        "changes_30d": 0,
        "changes_90d": 0,
        "pay_to_changes_90d": 0,
        "last_change_at": null,
        "last_change_kinds": [],
        "window_start": "2026-10-17T02:30:25.000Z",
        "limited": true
      },
      "registry_listing": {
        "last_seen_at": "2026-10-17T02:30:25.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_3476bb76891f7d38",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_3476bb76891f7d38"
      }
    },
    {
      "id": "cand_649af32dcf3cc5f5",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "InboxGuards Email Test",
      "name_source": "registry",
      "host": "api.inboxguardstest.com",
      "url": "https://api.inboxguardstest.com/v1/email-check",
      "method": "GET",
      "templated_url": false,
      "operator": null,
      "tags": [
        "email",
        "deliverability",
        "spf",
        "dkim",
        "dmarc"
      ],
      "category": null,
      "price_usd": 0.005,
      "price_source": "registry",
      "provider_endpoints": 3,
      "networks": [
        "eip155:8453"
      ],
      "networks_source": "observed",
      "payment_protocols": [
        "x402"
      ],
      "mainnet": true,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T02:20:25.000Z",
        "monitoring_days": 0,
        "limited_evidence": true,
        "checks_30d": 1,
        "passed_30d": 1,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-17T02:55:53.176Z",
          "result": "payment_required",
          "passed": true,
          "http_status": 402,
          "duration_ms": 622
        }
      },
      "registry_usage": {
        "calls_30d": 3,
        "unique_payers_30d": 3,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": {
        "current_since": "2026-10-17T02:55:53.176Z",
        "changes_30d": 0,
        "changes_90d": 0,
        "pay_to_changes_90d": 0,
        "last_change_at": null,
        "last_change_kinds": [],
        "window_start": "2026-10-17T02:20:25.000Z",
        "limited": true
      },
      "registry_listing": {
        "last_seen_at": "2026-10-17T02:20:25.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_649af32dcf3cc5f5",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_649af32dcf3cc5f5"
      }
    },
    {
      "id": "cand_dfeafa1ef465879e",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "Qonoro Email Validator",
      "name_source": "registry",
      "host": "api.qonoro.ai",
      "url": "https://api.qonoro.ai/v1/email/validate",
      "method": "POST",
      "templated_url": false,
      "operator": null,
      "tags": [
        "email-validation",
        "deliverability",
        "data-quality",
        "b2b",
        "qonoro"
      ],
      "category": null,
      "price_usd": 0.005,
      "price_source": "registry",
      "provider_endpoints": 5,
      "networks": [
        "eip155:8453"
      ],
      "networks_source": "observed",
      "payment_protocols": [
        "x402"
      ],
      "mainnet": true,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-16T13:07:55.000Z",
        "monitoring_days": 0.6,
        "limited_evidence": true,
        "checks_30d": 1,
        "passed_30d": 1,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-17T03:01:07.223Z",
          "result": "payment_required",
          "passed": true,
          "http_status": 402,
          "duration_ms": 254
        }
      },
      "registry_usage": {
        "calls_30d": 9,
        "unique_payers_30d": 3,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": {
        "current_since": "2026-10-17T03:01:07.223Z",
        "changes_30d": 0,
        "changes_90d": 0,
        "pay_to_changes_90d": 0,
        "last_change_at": null,
        "last_change_kinds": [],
        "window_start": "2026-10-16T15:44:38.000Z",
        "limited": true
      },
      "registry_listing": {
        "last_seen_at": "2026-10-16T13:07:55.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_dfeafa1ef465879e",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_dfeafa1ef465879e"
      }
    },
    {
      "id": "cand_2b4377cddea9646d",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "Toolsmith",
      "name_source": "registry",
      "host": "toolcall.click",
      "url": "https://toolcall.click/t/email/validate",
      "method": "GET",
      "templated_url": false,
      "operator": null,
      "tags": [
        "email-validation",
        "email-verification",
        "deliverability",
        "disposable-email",
        "mx-check"
      ],
      "category": null,
      "price_usd": 0.004,
      "price_source": "registry",
      "provider_endpoints": 14,
      "networks": [
        "eip155:8453"
      ],
      "networks_source": "observed",
      "payment_protocols": [],
      "mainnet": true,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-16T14:07:55.000Z",
        "monitoring_days": 0.6,
        "limited_evidence": true,
        "checks_30d": 1,
        "passed_30d": 1,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-17T02:11:01.119Z",
          "result": "payment_required",
          "passed": true,
          "http_status": 402,
          "duration_ms": 4
        }
      },
      "registry_usage": {
        "calls_30d": 3,
        "unique_payers_30d": 3,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": {
        "current_since": "2026-10-17T02:11:01.119Z",
        "changes_30d": 0,
        "changes_90d": 0,
        "pay_to_changes_90d": 0,
        "last_change_at": null,
        "last_change_kinds": [],
        "window_start": "2026-10-16T15:44:38.000Z",
        "limited": true
      },
      "registry_listing": {
        "last_seen_at": "2026-10-16T14:07:55.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_2b4377cddea9646d",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_2b4377cddea9646d"
      }
    },
    {
      "id": "cand_45b8634aee2c934c",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "AgentUtility.ai",
      "name_source": "registry",
      "host": "x402.agentutility.ai",
      "url": "https://x402.agentutility.ai/email-deliverability",
      "method": "POST",
      "templated_url": false,
      "operator": null,
      "tags": [
        "web-probe",
        "email",
        "deliverability"
      ],
      "category": null,
      "price_usd": 0.005,
      "price_source": "registry",
      "provider_endpoints": 17,
      "networks": [
        "eip155:8453",
        "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
      ],
      "networks_source": "observed",
      "payment_protocols": [],
      "mainnet": true,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-16T23:07:46.000Z",
        "monitoring_days": 0.2,
        "limited_evidence": true,
        "checks_30d": 1,
        "passed_30d": 1,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-16T23:08:04.435Z",
          "result": "payment_required",
          "passed": true,
          "http_status": 402,
          "duration_ms": 4557
        }
      },
      "registry_usage": {
        "calls_30d": 102,
        "unique_payers_30d": 2,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": {
        "current_since": "2026-10-16T23:08:04.435Z",
        "changes_30d": 0,
        "changes_90d": 0,
        "pay_to_changes_90d": 0,
        "last_change_at": null,
        "last_change_kinds": [],
        "window_start": "2026-10-16T23:07:46.000Z",
        "limited": true
      },
      "registry_listing": {
        "last_seen_at": "2026-10-16T23:07:46.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_45b8634aee2c934c",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_45b8634aee2c934c"
      }
    },
    {
      "id": "cand_66a0db0e7899a7c0",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "InboxGuards Email Test",
      "name_source": "registry",
      "host": "api.inboxguardstest.com",
      "url": "https://api.inboxguardstest.com/v1/report",
      "method": "GET",
      "templated_url": false,
      "operator": null,
      "tags": [
        "email",
        "deliverability",
        "spf",
        "dkim",
        "dmarc"
      ],
      "category": null,
      "price_usd": 0.05,
      "price_source": "registry",
      "provider_endpoints": 3,
      "networks": [
        "eip155:8453"
      ],
      "networks_source": "observed",
      "payment_protocols": [
        "x402"
      ],
      "mainnet": true,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T02:50:25.000Z",
        "monitoring_days": 0,
        "limited_evidence": true,
        "checks_30d": 1,
        "passed_30d": 1,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-17T03:20:50.184Z",
          "result": "payment_required",
          "passed": true,
          "http_status": 402,
          "duration_ms": 499
        }
      },
      "registry_usage": {
        "calls_30d": 1,
        "unique_payers_30d": 1,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": {
        "current_since": "2026-10-17T03:20:50.184Z",
        "changes_30d": 0,
        "changes_90d": 0,
        "pay_to_changes_90d": 0,
        "last_change_at": null,
        "last_change_kinds": [],
        "window_start": "2026-10-17T02:50:25.000Z",
        "limited": true
      },
      "registry_listing": {
        "last_seen_at": "2026-10-17T02:50:25.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_66a0db0e7899a7c0",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_66a0db0e7899a7c0"
      }
    },
    {
      "id": "cand_f2e2920584308de7",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "InboxGuards Email Test",
      "name_source": "registry",
      "host": "api.inboxguardstest.com",
      "url": "https://api.inboxguardstest.com/v1/fix-plan",
      "method": "GET",
      "templated_url": false,
      "operator": null,
      "tags": [
        "email",
        "deliverability",
        "spf",
        "dkim",
        "dmarc"
      ],
      "category": null,
      "price_usd": 1,
      "price_source": "registry",
      "provider_endpoints": 3,
      "networks": [
        "eip155:8453"
      ],
      "networks_source": "observed",
      "payment_protocols": [
        "x402"
      ],
      "mainnet": true,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T02:30:25.000Z",
        "monitoring_days": 0,
        "limited_evidence": true,
        "checks_30d": 1,
        "passed_30d": 1,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-17T03:06:01.411Z",
          "result": "payment_required",
          "passed": true,
          "http_status": 402,
          "duration_ms": 598
        }
      },
      "registry_usage": {
        "calls_30d": 1,
        "unique_payers_30d": 1,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": {
        "current_since": "2026-10-17T03:06:01.411Z",
        "changes_30d": 0,
        "changes_90d": 0,
        "pay_to_changes_90d": 0,
        "last_change_at": null,
        "last_change_kinds": [],
        "window_start": "2026-10-17T02:30:25.000Z",
        "limited": true
      },
      "registry_listing": {
        "last_seen_at": "2026-10-17T02:30:25.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_f2e2920584308de7",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_f2e2920584308de7"
      }
    },
    {
      "id": "cand_b16a75566f554e38",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "DKIM key lookup",
      "name_source": "registry",
      "host": "agent402.tools",
      "url": "https://agent402.tools/api/dkim-lookup",
      "method": "POST",
      "templated_url": false,
      "operator": null,
      "tags": [
        "network",
        "dkim",
        "email",
        "email-auth",
        "deliverability"
      ],
      "category": null,
      "price_usd": 0.002,
      "price_source": "registry",
      "provider_endpoints": 205,
      "networks": [
        "eip155:8453",
        "eip155:137",
        "eip155:42161",
        "eip155:143",
        "eip155:43114",
        "eip155:1329",
        "eip155:10",
        "eip155:4663",
        "eip155:42220"
      ],
      "networks_source": "registry",
      "payment_protocols": [],
      "mainnet": null,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T00:07:46.000Z",
        "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": 7,
        "unique_payers_30d": 4,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": null,
      "registry_listing": {
        "last_seen_at": "2026-10-17T00:07:46.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_b16a75566f554e38",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_b16a75566f554e38"
      }
    },
    {
      "id": "cand_32b2048e3b47d9b2",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "DMARC check",
      "name_source": "registry",
      "host": "agent402.tools",
      "url": "https://agent402.tools/api/dmarc-check",
      "method": "POST",
      "templated_url": false,
      "operator": null,
      "tags": [
        "network",
        "dmarc",
        "email",
        "email-auth",
        "deliverability"
      ],
      "category": null,
      "price_usd": 0.001,
      "price_source": "registry",
      "provider_endpoints": 205,
      "networks": [
        "eip155:8453",
        "eip155:137",
        "eip155:42161",
        "eip155:143",
        "eip155:43114",
        "eip155:1329",
        "eip155:10",
        "eip155:4663",
        "eip155:42220"
      ],
      "networks_source": "registry",
      "payment_protocols": [],
      "mainnet": null,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T00:07:46.000Z",
        "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": 7,
        "unique_payers_30d": 4,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": null,
      "registry_listing": {
        "last_seen_at": "2026-10-17T00:07:46.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_32b2048e3b47d9b2",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_32b2048e3b47d9b2"
      }
    },
    {
      "id": "cand_7d5cbdd54d7ad17d",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "Email Validation",
      "name_source": "registry",
      "host": "agentsvc.io",
      "url": "https://agentsvc.io/api/v1/proxy/email-validate",
      "method": "POST",
      "templated_url": false,
      "operator": null,
      "tags": [
        "email",
        "validation",
        "mx",
        "deliverability",
        "spam"
      ],
      "category": null,
      "price_usd": 0.0035,
      "price_source": "registry",
      "provider_endpoints": 70,
      "networks": [
        "eip155:8453",
        "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "eip155:137",
        "eip155:42161"
      ],
      "networks_source": "registry",
      "payment_protocols": [],
      "mainnet": null,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T02:45:25.000Z",
        "monitoring_days": 0,
        "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": 11,
        "unique_payers_30d": 3,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": null,
      "registry_listing": {
        "last_seen_at": "2026-10-17T02:45:25.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_7d5cbdd54d7ad17d",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_7d5cbdd54d7ad17d"
      }
    },
    {
      "id": "cand_460a2bbe07ba1b26",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "Factline",
      "name_source": "registry",
      "host": "factline.dev",
      "url": "https://factline.dev/v1/email/verify",
      "method": "GET",
      "templated_url": false,
      "operator": null,
      "tags": [
        "email",
        "verification",
        "validation",
        "deliverability",
        "disposable"
      ],
      "category": null,
      "price_usd": 0.002,
      "price_source": "registry",
      "provider_endpoints": 39,
      "networks": [
        "eip155:8453",
        "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
      ],
      "networks_source": "registry",
      "payment_protocols": [],
      "mainnet": null,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T02:40:25.000Z",
        "monitoring_days": 0,
        "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": 3,
        "note": "Reported by the registry; not our measurement."
      },
      "payment_terms": null,
      "registry_listing": {
        "last_seen_at": "2026-10-17T02:40:25.000Z",
        "listed": true
      },
      "links": {
        "page": "https://agentserviceatlas.com/services/cand_460a2bbe07ba1b26",
        "api": "https://agentserviceatlas.com/api/v1/services/cand_460a2bbe07ba1b26"
      }
    },
    {
      "id": "cand_6a73db4668a1829c",
      "tier": "discovered",
      "type": "api_endpoint",
      "name": "d21 email_validate",
      "name_source": "registry",
      "host": "draconic21-x402-api.onrender.com",
      "url": "https://draconic21-x402-api.onrender.com/v1/email_validate",
      "method": "POST",
      "templated_url": false,
      "operator": null,
      "tags": [
        "email-validation",
        "email-verification",
        "mx-lookup",
        "disposable-email",
        "deliverability"
      ],
      "category": null,
      "price_usd": 0.006,
      "price_source": "registry",
      "provider_endpoints": 44,
      "networks": [
        "eip155:8453",
        "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
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