Single verification endpoint: real-time email verification

Authorization: Bearer YOUR_API_KEY
Content-Type: application/json

{
  "email": "user@example.com"
}

curl -X POST https://app.validemailchecker.com/api/verify-single \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"email": "user@example.com"}'

{
  "email": "support@validemailchecker.com",
  "status": "role_account",
  "is_valid": true,
  "is_disposable": false,
  "is_role_account": true,
  "is_catch_all": false,
  "is_free_email": false,
  "mx_found": true,
  "domain": "validemailchecker.com",
  "risk_score": 7,
  "deliverability": "high",
  "credits_used": 1,
  "verified_at": "2026-05-19T20:35:27.124Z",
  "reason": "Role account detected"
}

app.post('/register', async (req, res) => {
  const { email, password } = req.body;

  const response = await fetch(
    'https://app.validemailchecker.com/api/verify-single',
    {
      method: 'POST',
      headers: {
        'Authorization': `Bearer ${process.env.VEC_API_KEY}`,
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({ email }),
    }
  );

  const result = await response.json();

  if (!result.is_valid) {
    return res.status(400).json({ error: 'Please use a valid email address.' });
  }

  if (result.is_disposable) {
    return res.status(400).json({ error: 'Temporary email addresses are not allowed.' });
  }

  await createUser(email, password);
  res.json({ success: true });
});

async function qualifyLead(email) {
  const result = await verifyEmail(email);

  return {
    email,
    isValid: result.is_valid,
    quality: result.deliverability,
    risk: result.risk_score,
    isBusinessEmail: !result.is_free_email,
    recommendation: recommend(result),
  };
}

function recommend(r) {
  if (r.status === 'safe' && !r.is_free_email) return 'HIGH_PRIORITY';
  if (r.status === 'safe')                     return 'NORMAL';
  if (r.is_valid)                              return 'LOW_PRIORITY';
  return 'SKIP';
}