Payments. Simplified.

<!-- Add once to your page -->
<script src="https://pay.yourdomain.com/paynex.js"
        data-paynex-key="YOUR_MERCHANT_PUBLIC_KEY"
        data-currency="INR"></script>

<!-- Tag any button -->
<button data-paynex-pay
        data-order-id="ORDER-1001"
        data-amount="499.00">
  Buy now with PayNex
</button>

• ✓ Works with plain HTML, React, Vue, Next.js and Nuxt
• ✓ Browser events for instant UI feedback
• ✓ Full REST API described in an OpenAPI spec

import crypto from 'node:crypto';

app.post('/api/paynex-webhook',
  express.raw({ type: 'application/json' }),
  (req, res) => {
    const sig = req.headers['x-gateway-signature'] || '';
    const expected = 'sha256=' + crypto
      .createHmac('sha256', process.env.PAYNEX_WEBHOOK_SECRET)
      .update(req.body).digest('hex');

    if (sig.length !== expected.length ||
        !crypto.timingSafeEqual(Buffer.from(sig),
                                Buffer.from(expected))) {
      return res.status(401).end();
    }
    // fulfil the order here
    res.json({ received: true });
  });