Webflow Webhooks

When to Use This Skill

• How do I receive Webflow webhooks?
• How do I verify Webflow webhook signatures?
• How do I handle form_submission events from Webflow?
• How do I process Webflow ecommerce order events?
• Why is my Webflow webhook signature verification failing?
• Setting up Webflow CMS collection item webhooks

Essential Code

Signature Verification (Manual)

const crypto = require('crypto');

function verifyWebflowSignature(rawBody, signature, timestamp, secret) {
  // Check timestamp to prevent replay attacks (5 minute window - 300000 milliseconds)
  const currentTime = Date.now();
  if (Math.abs(currentTime - parseInt(timestamp)) > 300000) {
    return false;
  }

  // Generate HMAC signature
  const signedContent = `${timestamp}:${rawBody}`;
  const expectedSignature = crypto
    .createHmac('sha256', secret)
    .update(signedContent)
    .digest('hex');

  // Timing-safe comparison
  try {
    return crypto.timingSafeEqual(
      Buffer.from(signature),
      Buffer.from(expectedSignature)
    );
  } catch {
    return false; // Different lengths = invalid
  }
}

Processing Events

app.post('/webhooks/webflow', express.raw({ type: 'application/json' }), (req, res) => {
  const signature = req.headers['x-webflow-signature'];
  const timestamp = req.headers['x-webflow-timestamp'];

  if (!signature || !timestamp) {
    return res.status(400).send('Missing required headers');
  }

  // Verify signature (use OAuth client secret or webhook-specific secret)
  const isValid = verifyWebflowSignature(
    req.body.toString(),
    signature,
    timestamp,
    process.env.WEBFLOW_WEBHOOK_SECRET
  );

  if (!isValid) {
    return res.status(400).send('Invalid signature');
  }

  // Parse the verified payload
  const event = JSON.parse(req.body);

  // Handle different event types
  switch (event.triggerType) {
    case 'form_submission':
      console.log('New form submission:', event.payload.data);
      break;
    case 'ecomm_new_order':
      console.log('New order:', event.payload);
      break;
    case 'collection_item_created':
      console.log('New CMS item:', event.payload);
      break;
    // Add more event handlers as needed
  }

  // Always return 200 to acknowledge receipt
  res.status(200).send('OK');
});

Common Event Types

Environment Variables

# For webhooks created via OAuth App
WEBFLOW_WEBHOOK_SECRET=your_oauth_client_secret

# For webhooks created via API (after April 2025)
WEBFLOW_WEBHOOK_SECRET=whsec_xxxxx  # Returned when creating webhook

Local Development

For local webhook testing, install Hookdeck CLI:

# Install via npm
npm install -g hookdeck-cli

# Or via Homebrew
brew install hookdeck/hookdeck/hookdeck

Then start the tunnel:

hookdeck listen 3000 --path /webhooks/webflow

No account required. Provides local tunnel + web UI for inspecting requests.

Resources

• What Are Webflow Webhooks - Event types and payload structure
• Setting Up Webflow Webhooks - Dashboard configuration and API setup
• Signature Verification Details - In-depth verification guide
• Express Example - Node.js implementation with tests
• Next.js Example - App Router implementation
• FastAPI Example - Python implementation

Important Notes

• Webhooks created through the Webflow dashboard do NOT include signature headers
• Only webhooks created via OAuth apps or API include x-webflow-signature and x-webflow-timestamp
• Always use raw body for signature verification, not parsed JSON
• Timestamp validation (5 minute window - 300000 milliseconds) is critical to prevent replay attacks
• Return 200 status to acknowledge receipt; other statuses trigger retries (up to 3 times)

Recommended: webhook-handler-patterns

This skill pairs well with webhook-handler-patterns for production-ready implementations:

• Handler sequence — Request flow and middleware order
• Idempotency — Handling duplicate events
• Error handling — Graceful failure and recovery
• Retry logic — Handling failed processing

Related Skills

• stripe-webhooks - Stripe webhook handling with similar HMAC-SHA256 verification
• shopify-webhooks - Shopify webhook implementation
• github-webhooks - GitHub webhook handling
• webhook-handler-patterns - Production patterns for all webhooks
• hookdeck-event-gateway - Webhook infrastructure and reliability

Sources:

• Working with Webhooks – Webflow Docs
• Webhook Signatures Changelog