Email Verification API
for Developers

Fast, accurate, and EU-hosted. Verify email addresses with a simple API call. GDPR compliant by design.

Why MailCheck?

Everything you need to keep your email lists clean.

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Syntax Validation

RFC 5322 compliant email format checking. Catch typos and invalid formats before they bounce.

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DNS & MX Checks

Verify the domain exists and has valid mail servers. No more sending to dead domains.

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Disposable Detection

Identify temporary and throwaway email addresses from 50+ known disposable providers.

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Fast Response

Sub-second verification times. Built on Cloudflare's edge network for global low latency.

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GDPR Compliant

EU-hosted infrastructure. No data retention beyond 24-hour cache. Privacy by design.

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Simple REST API

One endpoint, clear JSON responses, Bearer token auth. Integrate in minutes, not days.

90%
Accuracy (MVP)
<1s
Avg Response
100%
GDPR Compliant
EU
Data Hosted

Simple API Integration

Get started with a single API call.

curl -X POST https://api.mailcheck.dev/v1/verify \ -H "Authorization: Bearer sk_live_..." \ -H "Content-Type: application/json" \ -d '{"email": "user@example.com"}' # Response { "email": "user@example.com", "valid": true, "score": 90, "reason": "deliverable", "checks": { "syntax": "pass", "disposable": "pass", "mx": "pass", "smtp": "skip" } }

Simple, Transparent Pricing

We're currently in MVP phase with a generous free tier. Paid plans coming soon.

Free (MVP)

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Always free
  • 100 verifications / month
  • Full API access
  • Email support
  • EU-hosted, GDPR compliant
Get Your API Key

Usage-based paid tiers coming in Phase 2.

Ready to Get Started?

Get your API key in minutes. Start verifying emails today.

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Frequently Asked Questions

How accurate is the API?

Our MVP achieves 90% accuracy using syntax checks, DNS/MX lookup, and disposable domain detection. SMTP verification is coming in Phase 2. We're honest about what we do and don't do.

Is my data GDPR compliant?

Yes. We're EU-hosted with zero data retention beyond 24-hour cache. We don't store email addresses, only verification results and usage counts. No tracking. No data shared with third parties.

What happens if I exceed my plan limit?

Currently we're MVP phase with a single free tier (100 verifications/month). Paid plans with usage-based pricing coming in Phase 2.

Do you offer bulk verification?

Not yet. Our MVP supports single email verification. Bulk endpoints and webhooks are planned for Phase 2.

What payment methods do you accept?

We're in MVP phase with free access. Payment integrations coming in Phase 2 when paid plans launch.

Do you offer SDKs?

Not yet. Our API is simple REST and easy to integrate. SDKs for popular languages are planned for Phase 2.

What's your uptime SLA?

We run on Cloudflare Workers with EU data. We aim for high reliability but this is MVP. SLAs will be formalized when paid tiers launch.