Webflow Webhooks

Webflow Webhooks

Receive, verify, and process Webflow webhook events for form submissions, CMS changes, ecommerce orders, site publishing, and more.

Quick Start Workflow

Prerequisite: You need a Webflow account with an active site. For signature verification, create webhooks via the API (not the dashboard) — see Setup.

1. Create webhook: Register a webhook via the Webflow API for your desired event type
2. Receive events: Set up an endpoint that accepts POST requests with raw body parsing
3. Verify signatures: Validate x-webflow-signature and x-webflow-timestamp headers
4. Process events: Route events by triggerType and handle each accordingly
5. Acknowledge: Return 200 to confirm receipt (other statuses trigger retries)

Signature Verification

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');
  }

  const isValid = verifyWebflowSignature(
    req.body.toString(),
    signature,
    timestamp,
    process.env.WEBFLOW_WEBHOOK_SECRET
  );

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

  const event = JSON.parse(req.body);

  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;
    case 'collection_item_published':
      console.log('Published CMS items:', event.payload.items);
      break;
  }

  res.status(200).send('OK');
});

Event Types

Webflow supports 14 webhook event types across 6 categories: Forms, Site, Pages, Ecommerce, CMS, and Comments. See references/event-types.md for the complete reference with all payload schemas and examples.

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

Best Practices

1. Always verify signatures: Use HMAC-SHA256 verification for webhooks created via OAuth or API — see Verification
2. Use raw body for verification: Never verify against parsed JSON; configure your framework accordingly
3. Validate timestamps: Enforce a 5-minute window (300000ms) to prevent replay attacks
4. Return 200 quickly: Acknowledge receipt immediately; process events asynchronously for heavy workloads
5. Handle retries gracefully: Webflow retries up to 3 times on failure (10-minute intervals) — implement idempotency
6. Use HTTPS in production: Webhook endpoints must use HTTPS for security

Important Notes

• Never handle secrets in plain text. API tokens, OAuth client secrets, and webhook signing secrets must always be stored in environment variables or a secrets manager. Never ask the user for tokens or secrets directly, and never hard-code them in source files.
• 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
• 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, 10-minute intervals)

Reference Documentation

Each reference file includes YAML frontmatter with name, description, and tags for searchability. Use the search script available in scripts/search_references.py to quickly find relevant references by tag or keyword.

• references/event-types.md: Complete reference for all 14 event types with scopes, payload schemas, and examples
• references/webhook-api.md: REST API v2 endpoints for creating, listing, getting, and deleting webhooks
• references/overview.md: Webhook concepts, delivery behavior, limits, and security considerations
• references/setup.md: Dashboard and API configuration, OAuth, scopes, environment setup
• references/verification.md: HMAC-SHA256 signature verification, common gotchas, debugging
• references/faq.md: FAQ and troubleshooting for delivery issues, signature failures, and API errors

Searching References

# List all references with metadata
python scripts/search_references.py --list

# Search by tag (exact match)
python scripts/search_references.py --tag <tag>

# Search by keyword (across name, description, tags, and content)
python scripts/search_references.py --search <query>

Scripts

• scripts/search_references.py: Search reference files by tag, keyword, or list all with metadata