{
  "page": "https://x402-list.com/apis/email-verification-api",
  "title": "Email verification APIs you can pay per call",
  "answer": "As of October 26, 2026, x402-list compares 8 email verification services with task-matched endpoints. The median selected call costs $0.0045. Compare output type, documented scope and monitored reliability before choosing a route for an agent or application.",
  "date_modified": "2026-10-26",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "cite_as": "x402-list, \"Email verification APIs you can pay per call\", https://x402-list.com/apis/email-verification-api, data as of 2026-10-26. Licensed CC BY 4.0.",
  "how_to_cite": "Quote the number with its date and link the page URL. Data is CC BY 4.0: attribution to x402-list is required.",
  "methodology": "https://x402-list.com/methodology",
  "criteria": {
    "listed": "online, payment-ready, 30-day uptime >= 90%, known price, description >= 80 characters",
    "price": "cheapest current email verification endpoint of each service, USD per call (not its cheapest tool of any kind); services without one are left out",
    "generalist": "a gateway matching more than three unrelated capabilities: listed, never called the cheapest",
    "buyers_30d": "distinct wallets that paid the service on-chain in the last 30 days (measured floor)",
    "best": "most distinct buyers in 30 days; ties go to higher 30-day uptime"
  },
  "in_index": true,
  "stats": {
    "services": 8,
    "with_buyers_30d": 7,
    "median_price_usd": 0.0045000000000000005,
    "min_price_usd": 0.001,
    "max_price_usd": 0.05,
    "generalists": 3,
    "left_out_no_task_endpoint": 1
  },
  "faq": [
    {
      "question": "Is there a free email verification option here?",
      "answer": "The 8 listed services have positive per-call prices for their task endpoints. Check the particular request and provider terms for failure, free-tier and no-match handling. A reference quote belongs to its documented input shape and paid unit."
    },
    {
      "question": "How much do 100,000 email verification calls cost?",
      "answer": "At the median selected endpoint, 100,000 calls total $450.00 at $0.0045 per call. This assumes an unchanged request shape; follow-up products, retries and larger inputs can change the effective total."
    },
    {
      "question": "Does an HTTP 402 check prove paid delivery?",
      "answer": "It shows a payment requirement from the endpoint. It does not establish that a paid request delivered a correct answer. Monitoring, observed payments and provider output claims are separate evidence with different limits."
    },
    {
      "question": "Does a valid result prove address ownership?",
      "answer": "No. Address validation evaluates technical or risk signals. Proof that a user controls an inbox requires an appropriate challenge and response flow."
    },
    {
      "question": "Is an SMTP check a delivery guarantee?",
      "answer": "A provider can inspect server behavior without knowing whether a later message will arrive. Policy changes, transient failures and recipient-specific handling can affect the outcome. Keep the observation time and unknown states."
    },
    {
      "question": "Should I reject every disposable address?",
      "answer": "A disposable-domain flag describes a provider classification. Decide how that signal relates to your workflow, and keep it separate from a claim about the identity or intent of the person."
    },
    {
      "question": "Is finding an email address verification?",
      "answer": "Finding proposes an address associated with a person or domain. Verification evaluates a supplied address. A discovery output needs its own provenance and an explicit verification step if your workflow requires one."
    },
    {
      "question": "How should a batch handle unknown results?",
      "answer": "Store unknown separately from invalid, preserve the reason and date, and use a bounded review or retry policy. Check whether the endpoint charges per input, per result or per job before estimating costs."
    }
  ],
  "services": [
    {
      "name": "AgentBIT",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/agentbit",
      "price_usd_per_call": 0.03,
      "networks": [
        "ARB",
        "Base",
        "POL",
        "SOL"
      ],
      "uptime_30d": 100,
      "latency_ms": 131,
      "buyers_30d": 71,
      "last_checked_at": "2026-10-26T19:10:29.372Z",
      "what_it_does": "Provider advertises address risk and deliverability signals from live DNS without mailbox pinging.",
      "generalist": true,
      "price_endpoint": {
        "method": "GET",
        "path": "/v1/email/deliverability"
      },
      "task_endpoints": [
        {
          "method": "GET",
          "path": "/v1/email/deliverability",
          "price_usd_per_call": 0.03
        }
      ],
      "endpoints_listed": 25
    },
    {
      "name": "IPIntel.ai x402 Tools",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/ipintel-ai-x402-tools",
      "price_usd_per_call": 0.004,
      "networks": [
        "Base"
      ],
      "uptime_30d": 100,
      "latency_ms": 255,
      "buyers_30d": 25,
      "last_checked_at": "2026-10-26T19:03:44.996Z",
      "what_it_does": "Provider separates combined email validation from domain mail-configuration health.",
      "generalist": false,
      "price_endpoint": {
        "method": "POST",
        "path": "/email-validate"
      },
      "task_endpoints": [
        {
          "method": "POST",
          "path": "/domain-health",
          "price_usd_per_call": 0.001
        },
        {
          "method": "POST",
          "path": "/email-validate",
          "price_usd_per_call": 0.004
        }
      ],
      "endpoints_listed": 10
    },
    {
      "name": "Straelo Relay",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/straelo-relay",
      "price_usd_per_call": 0.005,
      "networks": [
        "Base"
      ],
      "uptime_30d": 100,
      "latency_ms": 229,
      "buyers_30d": 17,
      "last_checked_at": "2026-10-26T19:03:41.163Z",
      "what_it_does": "Provider describes syntax, domain and MX checks without SMTP mailbox verification.",
      "generalist": false,
      "price_endpoint": {
        "method": "GET",
        "path": "/email-validator/basic"
      },
      "task_endpoints": [
        {
          "method": "GET",
          "path": "/email-validator/basic",
          "price_usd_per_call": 0.005
        }
      ],
      "endpoints_listed": 10
    },
    {
      "name": "RallyLive Intel",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/rallylive-intel",
      "price_usd_per_call": 0.05,
      "networks": [
        "Base",
        "BSP"
      ],
      "uptime_30d": 100,
      "latency_ms": 218,
      "buyers_30d": 5,
      "last_checked_at": "2026-10-26T19:03:27.271Z",
      "what_it_does": "Provider lists batch verification and a separate domain deliverability report.",
      "generalist": false,
      "price_endpoint": {
        "method": "POST",
        "path": "/email/deliverability-report"
      },
      "task_endpoints": [
        {
          "method": "POST",
          "path": "/bulk/email-verify",
          "price_usd_per_call": 0.1
        },
        {
          "method": "POST",
          "path": "/email/deliverability-report",
          "price_usd_per_call": 0.05
        }
      ],
      "endpoints_listed": 10
    },
    {
      "name": "DOHMAN Machine Services",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/dohman-machine-services",
      "price_usd_per_call": 0.001,
      "networks": [
        "Base"
      ],
      "uptime_30d": 100,
      "latency_ms": 166,
      "buyers_30d": 4,
      "last_checked_at": "2026-10-26T19:10:21.133Z",
      "what_it_does": "Provider describes bounded syntax, mail-DNS and address-risk evidence without SMTP probing.",
      "generalist": false,
      "price_endpoint": {
        "method": "GET",
        "path": "/functions/v1/x402-email-verify-evidence"
      },
      "task_endpoints": [
        {
          "method": "GET",
          "path": "/functions/v1/x402-email-verify-evidence",
          "price_usd_per_call": 0.001
        }
      ],
      "endpoints_listed": 23
    },
    {
      "name": "Crypto Technicals & Web Utilities",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/crypto-technicals-web-utilities",
      "price_usd_per_call": 0.002,
      "networks": [
        "Base",
        "SOL"
      ],
      "uptime_30d": 100,
      "latency_ms": 122,
      "buyers_30d": 3,
      "last_checked_at": "2026-10-26T19:03:20.652Z",
      "what_it_does": "Provider lists an email verification route alongside unrelated technical utilities.",
      "generalist": true,
      "price_endpoint": {
        "method": "GET",
        "path": "/v1/email/verify"
      },
      "task_endpoints": [
        {
          "method": "GET",
          "path": "/v1/email/verify",
          "price_usd_per_call": 0.002
        }
      ],
      "endpoints_listed": 15
    },
    {
      "name": "PitchPilot Outreach API",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/pitchpilot-outreach-api",
      "price_usd_per_call": 0.003,
      "networks": [
        "Base"
      ],
      "uptime_30d": 100,
      "latency_ms": 299,
      "buyers_30d": 1,
      "last_checked_at": "2026-10-26T19:03:42.110Z",
      "what_it_does": "Provider lists domain sender-deliverability analysis rather than recipient ownership proof.",
      "generalist": true,
      "price_endpoint": {
        "method": "GET",
        "path": "/deliverability"
      },
      "task_endpoints": [
        {
          "method": "GET",
          "path": "/deliverability",
          "price_usd_per_call": 0.003
        }
      ],
      "endpoints_listed": 12
    },
    {
      "name": "M0 Email Verification",
      "reseller_of_brand_via": null,
      "url": "https://x402-list.com/services/m0-email-verification",
      "price_usd_per_call": 0.005,
      "networks": [
        "Base"
      ],
      "uptime_30d": 94.2,
      "latency_ms": 434,
      "buyers_30d": 0,
      "last_checked_at": "2026-10-26T19:10:02.555Z",
      "what_it_does": "Provider describes syntax and live DNS checks plus a lead-validation bundle; mailbox existence is not confirmed.",
      "generalist": false,
      "price_endpoint": {
        "method": "POST",
        "path": "/v1/verify-email"
      },
      "task_endpoints": [
        {
          "method": "POST",
          "path": "/v1/lead-validate",
          "price_usd_per_call": 0.015
        },
        {
          "method": "POST",
          "path": "/v1/verify-email",
          "price_usd_per_call": 0.005
        }
      ],
      "endpoints_listed": 3
    }
  ]
}