Email verification APIs are boring. That's exactly why they make money.
I just launched Email Verify MCP — and here's why I built it:
The Boring Money-Maker
While everyone builds "AI agents that do everything," the solo founders making real money are selling email verification, IP geolocation, and VAT validation. Boring B2B micro-APIs reliably pull $400-600/mo.
So I built one.
What It Does
From any AI agent (Cursor, Claude, Windsurf):
-
check_email— Full verification: syntax, MX records, SMTP handshake, disposable detection -
verify_bulk— Batch up to 10 emails at once
All DNS-based. No external API costs. Pure Node.js.
Pricing
| Tier | Price | Checks |
|---|---|---|
| Free | $0 | 50/day |
| Pro | $19/mo | 1,000/mo |
| Unlimited | $99/mo | Unlimited |
The Stack
- MCP Server (TypeScript, stdio transport)
-
npm:
@rumblingb/email-verify-mcp - Smithery: smithery.ai/servers/vishar-rumbling/email-verify-mcp
- Stripe: buy.stripe.com/aFadRb2z56ZKaU00wz1oI1l
Why This Works
- Real demand — every app with signup needs email verification
- Zero marginal cost — DNS lookups are free
- Clear upgrade path — 50 free → 1,000 pro → unlimited
- Agent-native — MCP protocol means Cursor/Claude can use it directly
Try It
npx @rumblingb/email-verify-mcp
Or add to your MCP config and start verifying emails from your AI agent.
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