Demo showing how to enrich new user signups from a Hubspot Form.

Flow: Hubspot form → Webhook → Clay enrichment → Slack notifications

Context: Prior to Aug 25, 2025, Hubspot offered Legacy apps which were a quick way to subscribe to webhooks. The latest changes to the HubSpot developer platform requires using the CLI to create an app and push it, and configuring webhooks via a folder structure. Legacy apps are significantly easier to set up but are no longer actively maintained but for the sake of simplicity, I recommend it. But you'll find instructions for all 3 opitons below.

1. Go to HubSpot Developer Dashboard
2. Legacy Apps → Create → Private → Fill out Basic info
3. Scopes → Add crm.objects.contacts.write
4. Webhooks → Set Target URL to your Val Town endpoint from ./webhook.ts
5. Create subscription:
   • Object: Contact
   • Event: Property changed → email
   • Subscribe

1. Install CLI: npm install -g @hubspot/cli@latest
2. Run: hs account auth
3. Run: hs project create (choose App, Private, Static Auth, Webhooks)
4. Add src/app/webhooks/webhook-hsmeta.json:

{
  "uid": "webhooks",
  "type": "webhooks",
  "config": {
    "settings": {
      "targetUrl": "YOUR_VAL_TOWN_URL",
      "maxConcurrentRequests": 10
    },
    "subscriptions": {
      "crmObjects": [{
        "subscriptionType": "object.propertyChange",
        "objectType": "contact",
        "propertyName": "email",
        "active": true
      }]
    }
  }
}

5. Run: hs project upload

• Requires HubSpot Professional plan - $800/month
• Instructions are here.

If you'd like, or even just for testing purposes, you can host HubSpot forms on Val Town - instructions

1. Submit HubSpot form
2. Webhook triggers → Clay enriches → Slack notifies