How does the Bulk Email Verifier API work?

Create a bulk operation by uploading a list of email addresses, then launch the operation. The API verifies all emails asynchronously using multi-layer checks. Use webhooks or polling to monitor progress.

What is the maximum batch size?

You can verify up to 20,000 email addresses per bulk operation. For larger lists, create multiple bulk operations.

What verification checks are performed?

Each email undergoes syntax validation, MX record checks, SMTP verification, disposable detection, catch-all detection, and deliverability scoring.

What is the data-quality guarantee?

If an address Tomba returned as valid hard-bounces, the credit comes back under the data-quality guarantee (verifier result deliverable or finder score of 60 or more, sent within 30 days from a domain with SPF, DKIM and DMARC).

How long does verification take?

速度はリストのサイズと各メールサーバーの応答速度によって異なります。ジョブをポーリングするか、Webhookを設定して完了の通知を受け取ってください。

What results are returned?

Each result includes the email, verification status (valid, invalid, accept_all, unknown), confidence score, disposable flag, SMTP provider, and MX records.

How do I download results?

Once processing completes, use the download endpoint to get results as CSV or JSON. Results include all verification data for each email.

Are webhooks supported?

Yes, configure a webhook URL to receive notifications when your bulk verification completes or when errors occur during processing.

How should I treat accept-all results?

Accept-all domains can be valid but riskier. Prioritize higher confidence scores and consider segmented sending strategies for these records.

What is a recommended verification workflow?

Verify lists close to send time, suppress invalid and disposable addresses, and re-verify older lists periodically to maintain deliverability.

// post /v1/bulk/verifier

Bulk Email Verifier API

Clean and score high-volume email lists with one asynchronous verification pipeline built for senders at scale.

無料 API キーを取得 API リファレンス

Email addresses最大 20,000 行

POST /bulk/verifier

curl -X POST "https://api.tomba.io/v1/bulk/verifier" \
  -H "X-Tomba-Key: $TOMBA_API_KEY" \
  -H "X-Tomba-Secret: $TOMBA_SECRET_KEY" \
  -H "Content-Type: application/json" \
  -d '{"name":"Email Verifier job","list":"richard@piedpiper.com\njohn@example.com","launch":true,"webhook_url":"https://hooks.example.com/tomba"}'

const res = await fetch("https://api.tomba.io/v1/bulk/verifier", {
  method: "POST",
  headers: {
    "X-Tomba-Key": process.env.TOMBA_API_KEY,
    "X-Tomba-Secret": process.env.TOMBA_SECRET_KEY,
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    "name": "Email Verifier job",
    "list": "richard@piedpiper.com\njohn@example.com",
    "launch": true,
    "webhook_url": "https://hooks.example.com/tomba"
  })
});
const { data } = await res.json(); // { id }

import os, requests

res = requests.post(
    "https://api.tomba.io/v1/bulk/verifier",
    headers={
        "X-Tomba-Key": os.environ["TOMBA_API_KEY"],
        "X-Tomba-Secret": os.environ["TOMBA_SECRET_KEY"],
    },
    json={
      "name": "Email Verifier job",
      "list": "richard@piedpiper.com\njohn@example.com",
      "launch": True,
      "webhook_url": "https://hooks.example.com/tomba"
    },
)
job_id = res.json()["data"]["id"]

// 01 · リクエスト

一括Email Verifier は1回の HTTPS リクエストです

キーとシークレットとともにパラメーターを送信します。すべての SDK、CLI、MCP サーバーがこれと同じ呼び出しを行います。

type: verifier
list | data | file: Email addresses
launch: true ですぐにジョブを開始
webhook_url: ジョブ終了時に署名付きイベントを受信
rows: 1ジョブあたり最大 20,000 行

POST /bulk/verifier

curl -X POST "https://api.tomba.io/v1/bulk/verifier" \
  -H "X-Tomba-Key: $TOMBA_API_KEY" \
  -H "X-Tomba-Secret: $TOMBA_SECRET_KEY" \
  -H "Content-Type: application/json" \
  -d '{"name":"Email Verifier job","list":"richard@piedpiper.com\njohn@example.com","launch":true,"webhook_url":"https://hooks.example.com/tomba"}'

const res = await fetch("https://api.tomba.io/v1/bulk/verifier", {
  method: "POST",
  headers: {
    "X-Tomba-Key": process.env.TOMBA_API_KEY,
    "X-Tomba-Secret": process.env.TOMBA_SECRET_KEY,
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    "name": "Email Verifier job",
    "list": "richard@piedpiper.com\njohn@example.com",
    "launch": true,
    "webhook_url": "https://hooks.example.com/tomba"
  })
});
const { data } = await res.json(); // { id }

import os, requests

res = requests.post(
    "https://api.tomba.io/v1/bulk/verifier",
    headers={
        "X-Tomba-Key": os.environ["TOMBA_API_KEY"],
        "X-Tomba-Secret": os.environ["TOMBA_SECRET_KEY"],
    },
    json={
      "name": "Email Verifier job",
      "list": "richard@piedpiper.com\njohn@example.com",
      "launch": True,
      "webhook_url": "https://hooks.example.com/tomba"
    },
)
job_id = res.json()["data"]["id"]

// 02 · レスポンス

返される内容

どの言語でも同じ JSON です。Tomba が把握していないフィールドは null となり、推測はしません。

GET/email-verifierフィールド

data.email.resultstring: deliverable, risky or undeliverable; empty for a disposable domain
data.email.statusstring: valid, accept_all, invalid, unknown or disposable (compare case-insensitively: a live check can return Valid)
data.email.scoreinteger: Confidence: 99 for valid, 77 or more for accept_all, 2 for disposable
data.email.smtp_providerstring | null: Mail provider from the MX records, such as Google
data.email.mx.recordsarray | null: The domain's MX hosts
data.email.mx_check, data.email.smtp_checkboolean: The domain has MX records (smtp_check is the same check; status says whether the mailbox exists)
data.email.accept_all, data.email.greylisted, data.email.blockboolean: Catch-all domain, check deferred, check refused by the server
data.email.disposable, data.email.webmail, data.email.gibberish, data.email.regexboolean: Disposable or webmail domain, random-looking address, valid syntax
data.sources[]array: Where the address was found
data.phone_data[]array | null: Phone numbers, when you send enrich_mobile

POST /bulk/verifier

201 Created

{
  "data": {
    "id": 1042
  }
}

各行は GET /email-verifier が返す形式です

200 OK

{
  "data": {
    "email": {
      "email": "richard@piedpiper.com",
      "result": "deliverable",
      "status": "valid",
      "score": 99,
      "smtp_provider": "Google",
      "mx": {
        "records": [
          "aspmx.l.google.com",
          "alt1.aspmx.l.google.com"
        ]
      },
      "mx_check": true,
      "smtp_server": true,
      "smtp_check": true,
      "accept_all": false,
      "greylisted": false,
      "block": false,
      "gibberish": false,
      "disposable": false,
      "webmail": false,
      "regex": true,
      "whois": {
        "registrar_name": null,
        "referral_url": null,
        "created_date": null
      }
    },
    "sources": [
      {
        "uri": "https://piedpiper.com/blog/engineering",
        "website_url": "piedpiper.com",
        "extracted_on": "2024-06-01T09:14:07+01:00",
        "last_seen_on": "2025-01-10T17:02:44+01:00",
        "still_on_page": true
      }
    ],
    "phone_data": null
  }
}

// 03 · 料金と制限

呼び出しの料金

呼び出しは以下の条件の場合にのみ課金されます。レート制限はプランによって異なります。

// 料金

1 verification credit per row, except disposable addresses. Plus 5 search credits per row with phone data.

Charged once, at the first download; later downloads are free

Jobs created: 15 per day for each type
Running jobs: 2 per type
Downloads: 25 per day for each job
Request size: 4 MB (CSV, list or rows)

// faq

Frequently Asked Questions

ほかにご質問がありますか？ヘルプセンターを見る

1分で最初の呼び出しを

無料アカウント、本物の API キー、Enterprise のお客様と同じエンドポイント。

1無料アカウントを作成月25回の検索。カード不要。

2キーとシークレットをコピーダッシュボードの「API キー」から。

3API を呼び出すリクエストを貼り付けると、JSON で応答が返ります。

const res = await fetch("https://api.tomba.io/v1/email-finder?domain=piedpiper.com&first_name=Richard&last_name=Hendricks", { headers: { "X-Tomba-Key": process.env.TOMBA_API_KEY, "X-Tomba-Secret": process.env.TOMBA_SECRET_KEY } }); const { data } = await res.json();

import os, requests res = requests.get( "https://api.tomba.io/v1/email-finder?domain=piedpiper.com&first_name=Richard&last_name=Hendricks", headers={ "X-Tomba-Key": os.environ["TOMBA_API_KEY"], "X-Tomba-Secret": os.environ["TOMBA_SECRET_KEY"], }, ) data = res.json()["data"]

{ "data": { "email": "richard@piedpiper.com", "first_name": "Richard", "last_name": "Hendricks", "full_name": "Richard Hendricks", "website_url": "piedpiper.com", "company": "Pied Piper", "pattern": "{first}", "department": "executive", "type": "personal", "position": "CEO", "country": "US", "gender": "male", "twitter": null, "linkedin": "https://www.linkedin.com/in/richard-hendricks", "score": 100, "accept_all": false, "phone_number": true, "verification": { "date": "2025-01-15T10:32:00+01:00", "status": "valid" }, "sources": [ { "uri": "https://piedpiper.com/blog/engineering", "website_url": "piedpiper.com", "extracted_on": "2024-06-01T09:14:07+01:00", "last_seen_on": "2025-01-10T17:02:44+01:00", "still_on_page": true } ], "phone_data": [] } }

Bulk Email Verifier API

一括Email Verifier は1回の HTTPS リクエストです

返される内容

呼び出しの料金

関連エンドポイント

Frequently Asked Questions

1分で最初の呼び出しを