{
  "api_status": "preview",
  "generated_at": "2026-10-18T20:09:02.698Z",
  "notes": [
    "We keep every service we find in the index, checked on its schedule. Search, the tree and browsing show the directory by default: the services that meet every listing criterion that applies to them (listing-criteria/3). Being in the directory means meeting these criteria; it is not a rating or an endorsement. Add scope=index to search everything we watch.",
    "Exact definitions of every field (unit, window, source): https://agentservicedirectory.com/fields",
    "tier says how a service was added, not a rating: reviewed entries come from our own listing files, with operator statements 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.",
    "Results are computed at generated_at; the same query may be answered from that result for up to a minute.",
    "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": {
    "scope": "directory",
    "provider": "usefulapi.io",
    "sort": "evidence",
    "limit": 50,
    "offset": 0
  },
  "total": 246,
  "items": [
    {
      "id": "cand_8f435e36ab2ef2fc",
      "tier": "discovered",
      "type": "mcp_server",
      "name": "17TRACK MCP by usefulapi",
      "name_source": "registry",
      "branches": {
        "primary": "commerce/shipping",
        "secondary": [],
        "method_version": "placement-ai/3",
        "tree_version": "tree/3",
        "placed_at": "2026-10-18T11:30:05.000Z"
      },
      "package": null,
      "directory": {
        "in_directory": true,
        "method_version": "listing-criteria/3",
        "criteria": {
          "says_what_it_does": true,
          "answers_now": true,
          "registry_payers_at_least_5": null,
          "curated_catalogue": null
        }
      },
      "host": "17track.usefulapi.io",
      "provider": "usefulapi.io",
      "url": "https://17track.usefulapi.io/mcp",
      "method": "GET",
      "templated_url": false,
      "operator": null,
      "tags": [],
      "category": null,
      "price_usd": null,
      "price_source": null,
      "provider_endpoints": 333,
      "networks": [],
      "networks_source": "registry",
      "payment_protocols": [],
      "mainnet": null,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "check_interval": "daily",
        "check_interval_rule": "Daily: 5 to 99 payers, and every new service until it has been probed 3 times.",
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T19:07:31.116Z",
        "monitoring_days": 1,
        "limited_evidence": true,
        "checks_30d": 2,
        "passed_30d": 2,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-18T19:20:34.690Z",
          "result": "auth_required",
          "passed": true,
          "http_status": 401,
          "duration_ms": 162
        }
      },
      "registry_usage": null,
      "payment_terms": null,
      "registry_listing": {
        "last_seen_at": "2026-10-18T09:07:09.218Z",
        "listed": true
      },
      "links": {
        "page": "https://agentservicedirectory.com/services/cand_8f435e36ab2ef2fc",
        "api": "https://agentservicedirectory.com/api/v1/services/cand_8f435e36ab2ef2fc"
      }
    },
    {
      "id": "cand_322eebc94f8ac6c5",
      "tier": "discovered",
      "type": "mcp_server",
      "name": "APITemplate.io MCP by usefulapi",
      "name_source": "registry",
      "branches": {
        "primary": "documents/pdf-office/generate",
        "secondary": [],
        "method_version": "placement-ai/3",
        "tree_version": "tree/3",
        "placed_at": "2026-10-18T09:20:05.000Z"
      },
      "package": null,
      "directory": {
        "in_directory": true,
        "method_version": "listing-criteria/3",
        "criteria": {
          "says_what_it_does": true,
          "answers_now": true,
          "registry_payers_at_least_5": null,
          "curated_catalogue": null
        }
      },
      "host": "apitemplate.usefulapi.io",
      "provider": "usefulapi.io",
      "url": "https://apitemplate.usefulapi.io/mcp",
      "method": "GET",
      "templated_url": false,
      "operator": null,
      "tags": [],
      "category": null,
      "price_usd": null,
      "price_source": null,
      "provider_endpoints": 333,
      "networks": [],
      "networks_source": "registry",
      "payment_protocols": [],
      "mainnet": null,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "check_interval": "daily",
        "check_interval_rule": "Daily: 5 to 99 payers, and every new service until it has been probed 3 times.",
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T19:07:31.116Z",
        "monitoring_days": 1,
        "limited_evidence": true,
        "checks_30d": 2,
        "passed_30d": 2,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-18T19:15:35.224Z",
          "result": "auth_required",
          "passed": true,
          "http_status": 401,
          "duration_ms": 241
        }
      },
      "registry_usage": null,
      "payment_terms": null,
      "registry_listing": {
        "last_seen_at": "2026-10-18T09:07:09.218Z",
        "listed": true
      },
      "links": {
        "page": "https://agentservicedirectory.com/services/cand_322eebc94f8ac6c5",
        "api": "https://agentservicedirectory.com/api/v1/services/cand_322eebc94f8ac6c5"
      }
    },
    {
      "id": "cand_69194daa00665e14",
      "tier": "discovered",
      "type": "mcp_server",
      "name": "Abstract API MCP by usefulapi",
      "name_source": "registry",
      "branches": {
        "primary": "messaging/email/validation",
        "secondary": [],
        "method_version": "placement-ai/3",
        "tree_version": "tree/3",
        "placed_at": "2026-10-18T10:35:05.000Z"
      },
      "package": null,
      "directory": {
        "in_directory": true,
        "method_version": "listing-criteria/3",
        "criteria": {
          "says_what_it_does": true,
          "answers_now": true,
          "registry_payers_at_least_5": null,
          "curated_catalogue": null
        }
      },
      "host": "abstract-api.usefulapi.io",
      "provider": "usefulapi.io",
      "url": "https://abstract-api.usefulapi.io/mcp",
      "method": "GET",
      "templated_url": false,
      "operator": null,
      "tags": [],
      "category": null,
      "price_usd": null,
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      "networks_source": "registry",
      "payment_protocols": [],
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      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "check_interval": "daily",
        "check_interval_rule": "Daily: 5 to 99 payers, and every new service until it has been probed 3 times.",
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T19:07:31.116Z",
        "monitoring_days": 1,
        "limited_evidence": true,
        "checks_30d": 2,
        "passed_30d": 2,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-18T19:20:34.729Z",
          "result": "auth_required",
          "passed": true,
          "http_status": 401,
          "duration_ms": 179
        }
      },
      "registry_usage": null,
      "payment_terms": null,
      "registry_listing": {
        "last_seen_at": "2026-10-18T09:07:09.218Z",
        "listed": true
      },
      "links": {
        "page": "https://agentservicedirectory.com/services/cand_69194daa00665e14",
        "api": "https://agentservicedirectory.com/api/v1/services/cand_69194daa00665e14"
      }
    },
    {
      "id": "cand_f31e9f18be72af46",
      "tier": "discovered",
      "type": "mcp_server",
      "name": "Accelo MCP by usefulapi",
      "name_source": "registry",
      "branches": {
        "primary": "productivity/crm/service-business",
        "secondary": [],
        "method_version": "placement-ai/3",
        "tree_version": "tree/3",
        "placed_at": "2026-10-18T13:35:05.000Z"
      },
      "package": null,
      "directory": {
        "in_directory": true,
        "method_version": "listing-criteria/3",
        "criteria": {
          "says_what_it_does": true,
          "answers_now": true,
          "registry_payers_at_least_5": null,
          "curated_catalogue": null
        }
      },
      "host": "accelo.usefulapi.io",
      "provider": "usefulapi.io",
      "url": "https://accelo.usefulapi.io/mcp",
      "method": "GET",
      "templated_url": false,
      "operator": null,
      "tags": [],
      "category": null,
      "price_usd": null,
      "price_source": null,
      "provider_endpoints": 333,
      "networks": [],
      "networks_source": "registry",
      "payment_protocols": [],
      "mainnet": null,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "check_interval": "daily",
        "check_interval_rule": "Daily: 5 to 99 payers, and every new service until it has been probed 3 times.",
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T19:07:31.116Z",
        "monitoring_days": 1,
        "limited_evidence": true,
        "checks_30d": 2,
        "passed_30d": 2,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-18T19:25:27.563Z",
          "result": "auth_required",
          "passed": true,
          "http_status": 401,
          "duration_ms": 128
        }
      },
      "registry_usage": null,
      "payment_terms": null,
      "registry_listing": {
        "last_seen_at": "2026-10-18T09:07:09.218Z",
        "listed": true
      },
      "links": {
        "page": "https://agentservicedirectory.com/services/cand_f31e9f18be72af46",
        "api": "https://agentservicedirectory.com/api/v1/services/cand_f31e9f18be72af46"
      }
    },
    {
      "id": "cand_1bb956ddfa7af06f",
      "tier": "discovered",
      "type": "mcp_server",
      "name": "Acuity Scheduling MCP by usefulapi",
      "name_source": "registry",
      "branches": {
        "primary": "productivity/calendar",
        "secondary": [],
        "method_version": "placement-ai/3",
        "tree_version": "tree/3",
        "placed_at": "2026-10-18T08:50:05.000Z"
      },
      "package": null,
      "directory": {
        "in_directory": true,
        "method_version": "listing-criteria/3",
        "criteria": {
          "says_what_it_does": true,
          "answers_now": true,
          "registry_payers_at_least_5": null,
          "curated_catalogue": null
        }
      },
      "host": "acuity-scheduling.usefulapi.io",
      "provider": "usefulapi.io",
      "url": "https://acuity-scheduling.usefulapi.io/mcp",
      "method": "GET",
      "templated_url": false,
      "operator": null,
      "tags": [],
      "category": null,
      "price_usd": null,
      "price_source": null,
      "provider_endpoints": 333,
      "networks": [],
      "networks_source": "registry",
      "payment_protocols": [],
      "mainnet": null,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "check_interval": "daily",
        "check_interval_rule": "Daily: 5 to 99 payers, and every new service until it has been probed 3 times.",
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T19:07:31.116Z",
        "monitoring_days": 1,
        "limited_evidence": true,
        "checks_30d": 2,
        "passed_30d": 2,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-18T19:15:34.675Z",
          "result": "auth_required",
          "passed": true,
          "http_status": 401,
          "duration_ms": 236
        }
      },
      "registry_usage": null,
      "payment_terms": null,
      "registry_listing": {
        "last_seen_at": "2026-10-18T09:07:09.218Z",
        "listed": true
      },
      "links": {
        "page": "https://agentservicedirectory.com/services/cand_1bb956ddfa7af06f",
        "api": "https://agentservicedirectory.com/api/v1/services/cand_1bb956ddfa7af06f"
      }
    },
    {
      "id": "cand_28b94b8816b1a990",
      "tier": "discovered",
      "type": "mcp_server",
      "name": "AddEvent MCP by usefulapi",
      "name_source": "registry",
      "branches": {
        "primary": "productivity/calendar",
        "secondary": [],
        "method_version": "placement-ai/3",
        "tree_version": "tree/3",
        "placed_at": "2026-10-18T09:10:05.000Z"
      },
      "package": null,
      "directory": {
        "in_directory": true,
        "method_version": "listing-criteria/3",
        "criteria": {
          "says_what_it_does": true,
          "answers_now": true,
          "registry_payers_at_least_5": null,
          "curated_catalogue": null
        }
      },
      "host": "addevent.usefulapi.io",
      "provider": "usefulapi.io",
      "url": "https://addevent.usefulapi.io/mcp",
      "method": "GET",
      "templated_url": false,
      "operator": null,
      "tags": [],
      "category": null,
      "price_usd": null,
      "price_source": null,
      "provider_endpoints": 333,
      "networks": [],
      "networks_source": "registry",
      "payment_protocols": [],
      "mainnet": null,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "check_interval": "daily",
        "check_interval_rule": "Daily: 5 to 99 payers, and every new service until it has been probed 3 times.",
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T19:07:31.116Z",
        "monitoring_days": 1,
        "limited_evidence": true,
        "checks_30d": 2,
        "passed_30d": 2,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-18T19:15:34.712Z",
          "result": "auth_required",
          "passed": true,
          "http_status": 401,
          "duration_ms": 175
        }
      },
      "registry_usage": null,
      "payment_terms": null,
      "registry_listing": {
        "last_seen_at": "2026-10-18T09:07:09.218Z",
        "listed": true
      },
      "links": {
        "page": "https://agentservicedirectory.com/services/cand_28b94b8816b1a990",
        "api": "https://agentservicedirectory.com/api/v1/services/cand_28b94b8816b1a990"
      }
    },
    {
      "id": "cand_6b1772decb377454",
      "tier": "discovered",
      "type": "mcp_server",
      "name": "Airbrake MCP by usefulapi",
      "name_source": "registry",
      "branches": {
        "primary": "compute/developer-data/errors-logs",
        "secondary": [],
        "method_version": "placement-ai/3",
        "tree_version": "tree/3",
        "placed_at": "2026-10-18T10:40:05.000Z"
      },
      "package": null,
      "directory": {
        "in_directory": true,
        "method_version": "listing-criteria/3",
        "criteria": {
          "says_what_it_does": true,
          "answers_now": true,
          "registry_payers_at_least_5": null,
          "curated_catalogue": null
        }
      },
      "host": "airbrake.usefulapi.io",
      "provider": "usefulapi.io",
      "url": "https://airbrake.usefulapi.io/mcp",
      "method": "GET",
      "templated_url": false,
      "operator": null,
      "tags": [],
      "category": null,
      "price_usd": null,
      "price_source": null,
      "provider_endpoints": 333,
      "networks": [],
      "networks_source": "registry",
      "payment_protocols": [],
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      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "check_interval": "daily",
        "check_interval_rule": "Daily: 5 to 99 payers, and every new service until it has been probed 3 times.",
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T19:07:31.116Z",
        "monitoring_days": 1,
        "limited_evidence": true,
        "checks_30d": 2,
        "passed_30d": 2,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-18T19:20:34.726Z",
          "result": "auth_required",
          "passed": true,
          "http_status": 401,
          "duration_ms": 175
        }
      },
      "registry_usage": null,
      "payment_terms": null,
      "registry_listing": {
        "last_seen_at": "2026-10-18T09:07:09.218Z",
        "listed": true
      },
      "links": {
        "page": "https://agentservicedirectory.com/services/cand_6b1772decb377454",
        "api": "https://agentservicedirectory.com/api/v1/services/cand_6b1772decb377454"
      }
    },
    {
      "id": "cand_50980013eb9320d9",
      "tier": "discovered",
      "type": "mcp_server",
      "name": "Aircall MCP by usefulapi",
      "name_source": "registry",
      "branches": {
        "primary": "messaging/sms-voice",
        "secondary": [],
        "method_version": "placement-ai/3",
        "tree_version": "tree/3",
        "placed_at": "2026-10-18T10:05:05.000Z"
      },
      "package": null,
      "directory": {
        "in_directory": true,
        "method_version": "listing-criteria/3",
        "criteria": {
          "says_what_it_does": true,
          "answers_now": true,
          "registry_payers_at_least_5": null,
          "curated_catalogue": null
        }
      },
      "host": "aircall.usefulapi.io",
      "provider": "usefulapi.io",
      "url": "https://aircall.usefulapi.io/mcp",
      "method": "GET",
      "templated_url": false,
      "operator": null,
      "tags": [],
      "category": null,
      "price_usd": null,
      "price_source": null,
      "provider_endpoints": 333,
      "networks": [],
      "networks_source": "registry",
      "payment_protocols": [],
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      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "check_interval": "daily",
        "check_interval_rule": "Daily: 5 to 99 payers, and every new service until it has been probed 3 times.",
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T19:07:31.116Z",
        "monitoring_days": 1,
        "limited_evidence": true,
        "checks_30d": 2,
        "passed_30d": 2,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-18T19:15:34.919Z",
          "result": "auth_required",
          "passed": true,
          "http_status": 401,
          "duration_ms": 179
        }
      },
      "registry_usage": null,
      "payment_terms": null,
      "registry_listing": {
        "last_seen_at": "2026-10-18T09:07:09.218Z",
        "listed": true
      },
      "links": {
        "page": "https://agentservicedirectory.com/services/cand_50980013eb9320d9",
        "api": "https://agentservicedirectory.com/api/v1/services/cand_50980013eb9320d9"
      }
    },
    {
      "id": "cand_499f2e5953473d29",
      "tier": "discovered",
      "type": "mcp_server",
      "name": "Amberflo MCP by usefulapi",
      "name_source": "registry",
      "branches": {
        "primary": "payments/invoicing",
        "secondary": [],
        "method_version": "placement-ai/3",
        "tree_version": "tree/3",
        "placed_at": "2026-10-18T09:55:05.000Z"
      },
      "package": null,
      "directory": {
        "in_directory": true,
        "method_version": "listing-criteria/3",
        "criteria": {
          "says_what_it_does": true,
          "answers_now": true,
          "registry_payers_at_least_5": null,
          "curated_catalogue": null
        }
      },
      "host": "amberflo.usefulapi.io",
      "provider": "usefulapi.io",
      "url": "https://amberflo.usefulapi.io/mcp",
      "method": "GET",
      "templated_url": false,
      "operator": null,
      "tags": [],
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      "price_usd": null,
      "price_source": null,
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      "networks": [],
      "networks_source": "registry",
      "payment_protocols": [],
      "mainnet": null,
      "evidence": {
        "operations": 1,
        "check_interval_hours": 24,
        "check_interval": "daily",
        "check_interval_rule": "Daily: 5 to 99 payers, and every new service until it has been probed 3 times.",
        "schedule_tier": "daily",
        "monitoring_since": "2026-10-17T19:07:31.116Z",
        "monitoring_days": 1,
        "limited_evidence": true,
        "checks_30d": 2,
        "passed_30d": 2,
        "missed_30d": 0,
        "pass_rate": 1,
        "freshness": "fresh",
        "last_check": {
          "at": "2026-10-18T19:15:34.925Z",
          "result": "auth_required",
          "passed": true,
          "http_status": 401,
          "duration_ms": 178
        }
      },
      "registry_usage": null,
      "payment_terms": null,
      "registry_listing": {
        "last_seen_at": "2026-10-18T09:07:09.218Z",
        "listed": true
      },
      "links": {
        "page": "https://agentservicedirectory.com/services/cand_499f2e5953473d29",
        "api": "https://agentservicedirectory.com/api/v1/services/cand_499f2e5953473d29"
      }
    },
    {
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