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New Verify emails from Claude, ChatGPT and Cursor

Email verification that protects every send

Clean your lists, stop fake signups and verify in real time with 99.5% accuracy. Every result comes with the reason behind it, and credits never expire.

Start free See pricing
  • 99.5% accuracy
  • Credits never expire
  • Unknowns are free
  • GDPR-ready

Drop your own address into the stream. Free, no signup.

Works with the tools you already use

One platform

Verify emails wherever they enter your business

Clean an existing list, check addresses inside your product, or stop bad ones at the form. Same engine, same accuracy, one balance of credits.

Bulk email verification

Upload a list. Get it back clean.

Drop in a CSV or Excel file of up to 100,000 emails, or sync a list from your CRM. Download only the addresses that are safe to send, with a health grade for the whole list.

Explore bulk verification

Real-time API

Verify inside your product

One REST call returns status, sub-status, score and provider. SDKs for Node.js and Python.

RocketShield

Stop fake signups at the form

One script tag checks every email field as it is typed and blocks disposable, invalid and undeliverable addresses before they reach your database.

MCP server and AI agents

Verify from your AI assistant

Connect Claude, ChatGPT, Cursor or any MCP client and ask it to verify a list, check a domain or clean a CRM export.

How it works

From messy list to safe send in three steps

  1. Upload or connect

    Upload a CSV or Excel file, call the API, or sync straight from HubSpot, Mailchimp, Salesforce and 30+ more tools.

  2. Every address is checked

    Syntax, domain, MX, disposable and role screening, catch-all analysis and a live SMTP mailbox check. No email is ever sent.

  3. Send with confidence

    Download the clean list or write results back to your tools. Unknowns cost nothing, and bounces on deliverable results are refunded.

Checks run on every address: Syntax Domain and DNS MX records Disposable and role Catch-all analysis SMTP mailbox check Risk signals

Explainable results

Know exactly why every address passed or failed

Every result shows its work: the SMTP reply, the mail server, catch-all behaviour and a precise sub-status for each address.

  • Deliverable

    The mailbox exists and accepts mail. Safe to send.

  • Risky

    Accept-all domains, role addresses or low-quality signals. Send with care.

  • Undeliverable

    The address will bounce: no mailbox, a dead domain, bad syntax or a disposable domain.

  • Unknown

    The mail server would not give a clear answer. Never charged.

How explainable verification works

Pay for answers, not guesses

A clear picture of every list, at a fair price

Each job ends with a health report: a grade, the safe-to-send share and exactly what was removed. You only pay for results we can stand behind.

  • Unknowns are free

    No charge when a server will not answer.

  • Duplicates are free

    Repeated addresses are removed before billing.

  • Bounce guarantee

    Hard bounces on deliverable results are refunded automatically.

  • No expiry

    Pay-as-you-go credits never expire.

For developers

An API you can ship in an afternoon

Clean REST endpoints, official SDKs, signed webhooks and versioned responses. Build against sandbox keys for free, then go live.

  • Node.js and Python SDKs, plus a CLI
  • Bulk jobs of up to 100,000 emails
  • Signed webhooks for job events
  • Versioned responses you can pin
  • Per-key spend caps and IP allowlists
  • MCP server for AI assistants
Explore the API Read the docs 
$ curl -X POST https://api.rocketverifier.com/v1/verify \
  -H "Authorization: Bearer $RV_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"email": "maya.chen@lumenlabs.io"}'

{
  "status": "deliverable",
  "sub_status": "none",
  "score": 97,
  "provider": "google.com",
  "catch_all_verdict": null,
  "did_you_mean": null
}
import RocketVerifier from '@rocketverifier/sdk';

const rv = new RocketVerifier(process.env.RV_API_KEY);
const result = await rv.verify('maya.chen@lumenlabs.io');

if (result.status === 'deliverable') {
  // safe to send
}
import os
from rocketverifier import RocketVerifier

rv = RocketVerifier(os.environ["RV_API_KEY"])
result = rv.verify("maya.chen@lumenlabs.io")

if result.status == "deliverable":
    # safe to send
    ...

Why RocketVerifier

Accuracy you can see, pricing you can trust

  • 99.5% accuracy

    Seven layers of checks, ending in a live SMTP handshake with the mail server.

  • A reason for every result

    Status, sub-status and score on every address, so you know exactly why it passed or failed.

  • Unknowns are always free

    If a server will not give a clear answer, you are not charged. Duplicates are free too.

  • Credits never expire

    Buy once and use them whenever you need. Subscription credits roll over every month.

  • Fast at any scale

    Typically under half a second on the API, and bulk jobs of up to 100,000 emails.

  • Every feature on every plan

    API, bulk, RocketShield, integrations and monitoring are included. No feature gating.

Pricing

Simple pricing that gets cheaper as you grow

Pay as you go with credits that never expire, or save 15% monthly and 25% yearly. Every feature is included.

10,000 credits

$49

$0.0049 per email

or $42/mo on a monthly plan

100,000 credits

$269

$0.0027 per email

or $229/mo on a monthly plan

Most popular

250,000 credits

$549

$0.0022 per email

or $467/mo on a monthly plan

1,000,000 credits

$1,149

$0.0011 per email

or $977/mo on a monthly plan

Compare all plans

100 free credits · No card required · 7-day refund on unused credits

Security and privacy

Your data stays yours

We verify addresses without ever emailing them, encrypt everything in transit and delete uploaded lists on your schedule.

Security overview System status

  • GDPR-ready

    We act as your processor, with DPAs available and full support for data subject rights.

  • Encrypted in transit

    TLS on every API and dashboard request. API keys are shown once and stored securely.

  • Automatic deletion

    Uploaded lists are deleted after 90 days by default, or sooner if you choose.

  • Account controls

    Two-factor authentication, SSO for organizations, IP allowlists and per-key spend caps.

FAQ

Email verification, answered

Everything you need to know before your first verification.

What is email verification?

Email verification checks whether an address can actually receive mail before you send to it. RocketVerifier checks syntax, the domain and its MX records, disposable and role addresses, catch-all behaviour and, finally, the mailbox itself with a live SMTP handshake. You get a clear result and the reason behind it.

How accurate is RocketVerifier?

RocketVerifier verifies with 99.5% accuracy. When a mail server will not give a definitive answer, the result is returned as unknown and you are not charged for it. Connect your sending platform and every hard bounce on an address we marked deliverable is refunded automatically.

How much does email verification cost?

Pay-as-you-go pricing starts at $6 for 1,000 credits and drops to $0.0011 per email at 1 million. Pay-as-you-go credits never expire, and monthly or yearly plans save 15% or 25%.

Do I get free credits to try it?

Create an account and claim 100 free verification credits with your work email. No credit card required. You can also try the free online checker without an account.

Can I verify emails in real time?

Yes. The REST API typically answers in under half a second, or 1 to 3 seconds when a live SMTP check is needed, and RocketShield checks addresses as they are typed into your forms. Official SDKs are available for Node.js and Python.

Is my data safe?

Yes. Traffic is encrypted with TLS, uploaded lists are deleted automatically after a retention period you control (90 days by default), and you can export or delete your data at any time. RocketVerifier never sends an email to the addresses it verifies.

Clean your list before your next send

Verify your first emails in minutes. Credits never expire, and unknown results are always free.

Start free See pricing

100 free credits · No card required · Credits never expire