Send Cal booking confirmations on WhatsApp
A new booking should not start another round of manual follow-up. Send a concise WhatsApp confirmation as soon as a Cal booking event reaches Notis.
Trigger
Webhook received
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Action
Send message
Send a text message to a whatsapp number. note: the message will reflect on the recipient's phone number only if they have texted first.
Why this helps
Copying booking details into WhatsApp takes attention away from the work the meeting was meant to support.
- Confirm bookings without switching between Cal and WhatsApp.
- Include the meeting time, attendee details, and booking link when the event provides them.
- Keep the message concise and easy to scan.
Setup
Build it in a few focused steps.
- 1Connect Cal and WhatsApp once in the Notis portal.
- 2Create an automation in Automations, New Automation, or tell Notis to create it from any channel.
- 3In one instruction, ask Notis to send the attendee a concise WhatsApp confirmation using details from the incoming Cal booking event.
- 4Pick the Notis webhook trigger and choose where run reports should go.
- 5Test with one real Cal booking event and confirm the message content.
Questions about this workflow
Does Cal provide a booking trigger for this workflow?
Cal exposes no trigger events in this setup, so the automation starts from a Notis webhook request containing booking details.
Can the WhatsApp message include the meeting time and link?
Ask Notis to include them when they are present in the webhook data. Missing details must be supplied in the request or left out.
Can this send to a contact who has never messaged the business?
The Send message action delivers only if the recipient has texted the WhatsApp number first. Use an approved template when appropriate for messages outside the 24-hour window.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Cal to Whatsapp. A trigger fires from one place; an action lands in another.
Cal triggers
Whatsapp actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Create message template
Create a new message template for the whatsapp business account. templates must be approved by whatsapp before they can be used. templates are required for marketing messages and messages sent outside the 24-hour window.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Delete message template
Delete a message template from the whatsapp business account. this permanently removes the template and it cannot be recovered. only delete templates that are no longer needed.
Get business profile
Get the business profile information for a whatsapp business phone number. this includes business details like description, address, website, and contact info.
Get media
Get information about uploaded media including a temporary download url. the download url is valid for 5 minutes and can be used to retrieve the actual media file. this is useful for downloading media that was sent to your whatsapp number.
Get media info
Get metadata about uploaded media without generating a download url. this is useful for checking file size, type, and hash without downloading the file. use get media if you need the actual download url.
Get message templates
Get all message templates for the whatsapp business account. templates are required for sending messages outside the 24-hour window and for marketing/utility messages.
Get phone number
Get details of a specific phone number associated with a whatsapp business account.
Get phone numbers
Get all phone numbers associated with a whatsapp business account (waba).
Connect any two apps with Notis in the middle.
Cal and Whatsapp, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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