hookdeck/webhook-skills/hubspot-webhooks

const crypto = require('crypto');
const MAX_AGE_MS = 5 * 60 * 1000; // 5 minutes
/**
 * Verify HubSpot v3 webhook signature.
 *
 * Signed content = HTTP method + request URI + raw body + timestamp
 * Signature is HMAC-SHA256 (base64) of that string using the app's Client Secret.
 */
function verifyHubSpotWebhook({ method, uri, rawBody, timestamp, signature, secret }) {
  if (!signature || !timestamp || !secret) return false;
  // Reject stale requests (older than 5 minutes)
  const ts = Number(timestamp);
  if (!Number.isFinite(ts) || Math.abs(Date.now() - ts) > MAX_AGE_MS) return false;
  const body = Buffer.isBuffer(rawBody) ? rawBody.toString('utf8') : rawBody;
  const signedContent = `${method}${uri}${body}${timestamp}`;
  const expected = crypto
    .createHmac('sha256', secret)
    .update(signedContent, 'utf8')
    .digest('base64');
  try {
    return crypto.timingSafeEqual(Buffer.from(expected), Buffer.from(signature));
  } catch {
    return false;
  }
}

const express = require('express');
const app = express();
// CRITICAL: Use express.raw() - HubSpot requires raw body for HMAC verification
app.post('/webhooks/hubspot',
  express.raw({ type: 'application/json' }),
  (req, res) => {
    const signature = req.headers['x-hubspot-signature-v3'];
    const timestamp = req.headers['x-hubspot-request-timestamp'];
    // Reconstruct the full request URI (HubSpot signs the URL it called)
    const uri = `${req.protocol}://${req.get('host')}${req.originalUrl}`;
    const valid = verifyHubSpotWebhook({
      method: req.method,
      uri,
      rawBody: req.body,
      timestamp,
      signature,
      secret: process.env.HUBSPOT_CLIENT_SECRET,
    });
    if (!valid) {
      console.error('HubSpot signature verification failed');
      return res.status(400).send('Invalid signature');
    }
    // HubSpot sends an array of events in each webhook
    const events = JSON.parse(req.body.toString());
    for (const event of events) {
      switch (event.subscriptionType) {
        case 'contact.creation':
          console.log('New contact:', event.objectId);
          break;
        case 'contact.propertyChange':
          console.log('Contact property changed:', event.objectId, event.propertyName);
          break;
        case 'deal.creation':
          console.log('New deal:', event.objectId);
          break;
        default:
          console.log('Unhandled event:', event.subscriptionType);
      }
    }
    res.status(200).send('OK');
  }
);

import hmac
import hashlib
import base64
import time
MAX_AGE_MS = 5 * 60 * 1000  # 5 minutes
def verify_hubspot_webhook(method: str, uri: str, raw_body: bytes,
                           timestamp: str, signature: str, secret: str) -> bool:
    if not signature or not timestamp or not secret:
        return False
    try:
        ts = int(timestamp)
    except ValueError:
        return False
    if abs(int(time.time() * 1000) - ts) > MAX_AGE_MS:
        return False
    body = raw_body.decode("utf-8")
    signed_content = f"{method}{uri}{body}{timestamp}"
    expected = base64.b64encode(
        hmac.new(secret.encode("utf-8"), signed_content.encode("utf-8"), hashlib.sha256).digest()
    ).decode("utf-8")
    return hmac.compare_digest(expected, signature)

HUBSPOT_CLIENT_SECRET=your_app_client_secret   # From your HubSpot app settings

# Start tunnel (no account needed)
npx hookdeck-cli listen 3000 hubspot --path /webhooks/hubspot

// Generated with: hubspot-webhooks skill
// https://github.com/hookdeck/webhook-skills