Testing

Test and debug webhooks

Verify that your webhook integration works before deploying to production. This page covers how to receive webhooks on your local machine and how to diagnose common delivery and verification failures.

Local Development

Webhooks require a publicly reachable URL, so you need to expose your local server to the internet during development.

Using Cloudflare Tunnels

Cloudflare Tunnels provide a free way to expose your local server without opening firewall ports:

cloudflared tunnel --url localhost:3000

You’ll get a public URL like https://abc123.trycloudflare.com. Use this in your webhook config:

{
  "url": "https://abc123.trycloudflare.com/webhook"
}

Troubleshooting

Webhooks Not Arriving

• Endpoint not accessible - Verify your server is publicly reachable and firewalls allow incoming connections
• Using HTTP - Webhook URLs must use HTTPS
• Wrong events - Check the events filter in your webhook config
• Timeout errors - Ensure your endpoint responds within 10 seconds

Signature Verification Failing

The most common cause is using the parsed JSON body instead of the raw request body. A second cause is using the wrong secret, so confirm yours matches the value in your account settings.

// Wrong - using parsed body
const signature = crypto
  .createHmac('sha256', secret)
  .update(JSON.stringify(req.body))
  .digest('hex');

// Correct - using raw body
app.use('/webhook', express.raw({ type: 'application/json' }));
app.post('/webhook', (req, res) => {
  const signature = crypto
    .createHmac('sha256', secret)
    .update(req.body) // Raw buffer
    .digest('hex');
});