Node.js Express Middleware Email Verification Guide

Add real-time email verification and disposable-email blocking to Node.js Express Middleware with the VeriShield Edge API. The snippet below gates a signup and returns the canonical email identity.

Language

JavaScript / TypeScript

Ecosystem

NPM

Latency

< 85ms

Install

Shell

npm install express

Verification code

JavaScript / TypeScript

export const verishieldGuard = async (req, res, next) => {
  const response = await fetch('https://verishield-edge-api.p.rapidapi.com/v1/verify', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json', 'X-RapidAPI-Key': process.env.RAPIDAPI_KEY },
    body: JSON.stringify({ email: req.body.email })
  });
  const data = await response.json();
  if (data.fraud_risk.recommendation === 'BLOCK') return res.status(403).json({ error: 'Blocked' });
  req.canonicalEmail = data.canonical_email;
  next();
};

What this protects against

Disposable and temporary inboxes, Gmail dot-trick and plus-alias multi-accounting, high-entropy bot usernames, and freshly registered fraud domains. The API returns a 0-100 fraud score with an ALLOW, CHALLENGE_2FA or BLOCK recommendation.

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