Features

Everything you need to verify email, in one clean API

From a single real-time check to multi-million-row list cleaning, MailBounce gives developers honest, accurate email validation with billing that only charges for definitive answers.

Real-Time Validation API

Validate any address in a single API call with layered checks for syntax, MX records over DNS-over-HTTPS, disposable and role accounts, free-provider flags, and typo suggestions returned as clean, predictable JSON.

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Bulk List Cleaning

Upload a CSV, TXT, or ZIP file and let background processing return your list neatly categorized as valid, invalid, catch-all, unknown, or disposable, ready to export back to CSV.

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SMTP Mailbox Verification

Go beyond format checks with live SMTP verification that connects to the mail server and issues a RCPT TO probe to confirm whether the mailbox actually exists.

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Disposable & Role Detection

Automatically flag throwaway disposable domains and shared role accounts like info@ or support@ so you can filter out signups and contacts that hurt engagement before they ever reach your list.

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Deliverability & Reputation Protection

Catch invalid, risky, and catch-all addresses before you send so your bounce rates stay low and your sender reputation stays healthy with mailbox providers.

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Built for Developers

Get started in minutes with a free no-credit playground, a clean JSON API at api.mailbounce.co, and transparent credit billing where unknown results never cost you a credit.

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Pay for answers, not guesses

Credit-based email verification with no forced subscription. A credit is spent only on a definitive verdict — "unknown" results are always free, and every account gets 100 free credits every month. Start in the free playground without adding a card.

Free Playground
$0

/forever

Kick the tires with zero credits and zero card. Validate addresses right in the browser to see exactly what MailBounce returns before you commit.

  • Interactive validation playground — no credits required
  • Full check pipeline: syntax, MX, disposable, role & free-provider flags
  • Typo / did-you-mean suggestions
  • Live SMTP mailbox results (RCPT TO) on sample lookups
  • Clean JSON response preview
  • No credit card, no time limit
Open the playground
Pay-as-you-go
~$0.004

/per credit

Top up credits when you need them and let them sit until you do. No monthly minimum, no expiring subscription.

  • Real-time validation API + bulk list validation
  • One credit per definitive verdict only
  • 'Unknown' results are free
  • 100 free credits every month
  • Bulk CSV / TXT / ZIP upload with categorized results & CSV export
  • Buy credits as you go — balance doesn't expire
Buy credits
Pro
~$0.0015

/per credit

Better per-credit rate for teams running steady volume. Same transparent rules — you still never pay for an 'unknown', and every account gets 100 free credits every month.

  • Everything in Pay-as-you-go
  • Lower effective price per credit on larger packs
  • Higher throughput for real-time API and bulk jobs
  • Priority background processing for large lists
  • Full categorized exports: valid / invalid / catch-all / unknown / disposable
  • Email support
Start with Pro
Scale
Volume

/talk to us

High-volume or platform usage where you want a custom credit rate and terms. We'll quote based on your monthly verdict volume — no surprise overages.

  • Everything in Pro
  • Custom per-credit pricing for high volume
  • Annual credit commitments available
  • Usage forecasting and billing support
  • Direct line for integration questions
  • No charge for 'unknown' results; 100 free credits every month
Contact us

MailBounce is a newer, independent service — we'd rather earn your trust with fair billing than oversell. A credit is consumed only when we return a definitive verdict (e.g. valid, invalid, disposable, catch-all) — one credit per address each time you validate it; "unknown" results are always free, and every account gets 100 free credits every month. Prices shown are indicative and may be adjusted as our credit packs evolve — see app.mailbounce.co for current rates, or contact us for volume and Scale pricing. No subscription is required; the free playground stays free to try.