What is this?
The Cal.com integration turns booking events into WhatsApp messages. When someone books, requests, reschedules or cancels a meeting on Cal.com, an automation sends the template you chose — for example a confirmation with the time and a reminder to join.What can I do here?
- Send a WhatsApp template for each Cal.com booking event
- Get a ready-made automation that routes each event to the right template
- See every request Cal.com sent, including duplicates and failures
- Have every delivery checked with a signature the platform generates for you
How to use it
1
Open the Cal.com page
Go to Integrations, click Cal.com, then Connect.
2
Enter your Cal.com details
Paste your Cal.com API key (in Cal.com under Settings → Developer → API keys).
3
Choose your messages
Pick a WhatsApp template for each event you want to message about:
Leave an event empty to send nothing for it.
4
Set up and activate
Click Set up and activate. The platform registers the webhook with Cal.com for you and creates a ready-made automation that sends the right template for each event. You can open that automation in the builder any time.
Things to know
- The customer’s phone number comes from the attendee’s booking details. Depending on your booking form it can be the attendee’s phone, an attendee phone field, an SMS-reminder number, or a phone location. Add a phone field to your event type so every booking can be messaged.
- Repeats are ignored. If Cal.com sends the same event twice, the customer isn’t messaged twice.
Troubleshooting / Technical Notes
- Connecting fails. Check the details you entered and that they belong to the right Cal.com account. The error from Cal.com is shown on the page.
- No messages are sent. Check the connection shows Connected, a template is chosen for the event, and the template is approved.
- A request shows as failed. Open the connection’s Activity tab and select the request to see the error and its raw body. A missing phone number is the most common cause.
- Webhooks look missing. On the connection page, click Verify on Cal.com to check they are still registered. If any are missing, disconnect and reconnect to register them again.
- You rotated your key or token. Open the connection’s Settings tab and update the credentials.