Email verification built for European developers

• ~80ms cached

  Real-time API

  Fast enough to sit inside a signup form, not a weekend list-cleaning job. Cached and DNS-only lookups resolve in about 80ms; a full SMTP probe stays under a second.

  await verifyEmail("user@example.com")
  // resolves in 82ms

• GDPR Art. 28

  GDPR-first

  EU-hosted in Frankfurt. DPA signed by default. Zero data crosses to the US. Full data flow documented on our Security page.

  // Data stays in EU — always
  // DPA included in every plan

• Reason codes

  Scoring with reasons

  Get a score AND the reason. Never wonder why an email was flagged risky. Use the reason field to show users a helpful error.

  { score: 12, reason: "disposable_domain" }

• No tricks

  Transparent pricing

  Pay per verification. No credits. No multipliers. No bundles that expire. Your bill is exactly what you'd calculate in a spreadsheet.

  // 10,000 verifications × €0.001
  // = €10.00 — always

Hover any check to learn exactly what it validates.

// lib/mailbeam.js — no SDK to install; Mailbeam is one endpoint.
export async function verifyEmail(email) {
  const response = await fetch("https://api.mailbeam.dev/v1/verify", {
    method: "POST",
    headers: {
      Authorization: `Bearer ${process.env.MAILBEAM_KEY}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({ email }),
    signal: AbortSignal.timeout(3000),
  });
  if (!response.ok) throw new Error(`Mailbeam returned ${response.status}`);
  return response.json();
}

// middleware/checkEmail.js
import { verifyEmail } from "../lib/mailbeam.js";

export async function checkEmail(req, res, next) {
  const { valid, score, reason } = await verifyEmail(req.body.email);

  if (!valid || score < 60) {
    return res.status(422).json({ error: reason ?? "Invalid email." });
  }
  next();
}

// routes/auth.js
app.post("/api/signup", checkEmail, createUser);

The HTTP API is the interface we ship first — official SDKs for Node, Python, PHP, Ruby and Go follow after the private beta. View full docs →