Know which emails are real before you send.
Bad addresses bounce, and bounces wreck your sender reputation. MailCull checks your list and tells you, in plain English, which emails are safe to send. Try it right here, no account needed.
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See exactly why each address passed or failed.
Most verifiers hand you a green light and a number, then ask you to trust it. We show you the mail server’s actual reply for every address. And when it’s a close call, our AI Analyst gives you a second opinion.
Not a clean yes or no? Ask the AI.
Catch-alls and role accounts never give a straight answer. The AI Analyst weighs the signals and tells you what it would do.
Meet the AI Analyst →- Mail lands at
- aspmx.l.google.example
- Confidence
- High
- In plain English
- A real inbox that accepts mail. Safe to send.
The same answers, in your code.
Everything you see on screen comes back in the response. Plug it into your app, or let Claude and other AI agents verify addresses for you over MCP.
curl -X POST https://mailcull.io/api/v1/email-validations \ -H "Authorization: Bearer mc_live_••••" \ -H "Content-Type: application/json" \ -d '{"email": "[email protected]"}' // response { "data": { "id": 4821, "status": "completed", "result": { "finalStatus": "deliverable", "score": 96, "reason": "smtp_confirmed", "smtpStatus": "deliverable" } } }
Your list stays yours.
We check addresses. That’s the whole business.
Wiped from disk after the scan
Your raw CSV is deleted from disk shortly after it’s processed. The results stay in your account history until you delete them yourself.
No data side-business
We don’t send mail, and we don’t enrich or resell data. There’s no second business here that your list could quietly feed.
Free to start. $9 for everything.
Checking 10,000 emails: $65 on ZeroBounce $50 on NeverBounce $98 on Hunter or $9 flat, here.
- 500 checks a month
- Deep scan included, same engine as Pro
- 25 AI reads a month
- Quick or deep scan, one credit each
- No API access
- 100,000 checks a month
- Deep scan on every check
- 500 AI reads a month
- Full API access and MCP
- 30-day money-back guarantee
A few things people ask before they try it.
Why don’t you publish an accuracy percentage?
Most validators advertise 99%+ accuracy. Independent benchmarks that run the same list through every tool put real-world accuracy around 96–98%, solid but not the number on the box. We skip the percentage because the receipts are the proof: every verdict shows the server reply, the MX record, and the confidence score. You decide what to trust.
$9 a month sounds too cheap. Are you cutting corners?
No. An SMTP handshake costs a fraction of a cent in compute, so checking an address is genuinely cheap. The one genuinely expensive step is the AI read, which is exactly why those are metered and the checks barely are. The rest of what the big names charge funds sales teams and ad budgets I don’t have. Free and Pro run the same scan engine; Pro just raises the monthly ceiling and adds API + MCP.
How is this different from the big verifiers?
Same core job, three differences. Every verdict ships with the server reply and the MX record, so you can audit it instead of trusting a label. The price is flat and a fraction of theirs. And the API, AI Analyst, and MCP are all in the $9.
Is my uploaded data safe?
Yes. Your file is deleted automatically after scanning, and we never sell or share validation data. We don’t send email, so we have no use for your contacts. GDPR-compliant, start to finish.
Do you have an API, AI, and MCP?
The API and MCP are Pro; the AI Analyst is on both plans: 25 reads a month on Free, 500 on Pro. Pro adds a REST API with live keys and an MCP server, so Claude, Cursor, and other agents can verify addresses directly. The AI Analyst explains the reasoning behind any verdict.
What about catch-all domains?
Catch-all domains accept everything, so a thumbs-up from the server there means nothing. We mark them risky and say so in the receipt. For Microsoft 365 domains we run a tenant-level probe that often gets a real answer anyway.
What happens with unknown verdicts?
An unknown still uses a credit. It’s a completed check. We mark them clearly and tell you why: greylisted, server timeout, and so on, so you can rerun those rows later.
Do you do warmup, DMARC, or blacklist monitoring?
No continuous monitoring. MailCull does one thing well: it tells you which addresses are safe to send to, and shows you why. For a quick one-time check, our free blacklist tool queries 25+ public blocklists in seconds. For warmup or ongoing monitoring, we’ll point you to tools built for that.
Your list has bad emails in it. Let’s cull them.
The free plan’s 500 checks a month are enough to clean a small list end to end. Paste an address above, or upload a list and see the receipts.
