Scenario ideas
- Router: if the guest email domain is a company domain, create a HubSpot deal; otherwise add to Mailchimp.
- Write every booking to Google Sheets and build a weekly utilization report.
- Create a Monday.com or Asana item for onboarding calls with the booking time as due date.
- Send a WhatsApp or SMS confirmation through Twilio for in-person appointments.
- On cancellation, free up the related resource in Airtable and notify the team.
Webhook headers and security
Requests include X-IntoCal-Event, X-IntoCal-Signature (sha256=HMAC of the body with your endpoint secret), X-IntoCal-Timestamp and a unique X-IntoCal-Delivery ID you can use to ignore duplicates.
When to use the API instead
Webhooks tell Make what happened. To let Make act on IntoCal — create bookings, check open slots, cancel meetings — use Make's HTTP module with the IntoCal REST API and an sk_live_ API key.