Webhook-Triggered WhatsApp Meeting Buttons
Your scheduling tool sends a webhook when someone books time. Notis catches it and sends WhatsApp buttons: Confirm, Reschedule, Send Prep Materials. All in one message.
Trigger
Webhook received
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Action
Send interactive buttons
Send an interactive button message to a whatsapp number. button messages allow users to quickly respond by tapping up to 3 predefined buttons. perfect for yes/no questions, quick choices, or call-to-action scenarios. note: the message will be delivered to the recipient only if they have texted first.
Why this helps
Booking notifications come in via email or Slack; you manually send meeting details separately, creating fragmented workflows.
- Unified workflow: all meeting actions happen in WhatsApp, not scattered across apps
- Faster confirmations: buttons drive faster RSVP and detail-gathering than email
- Flexible: works with any tool that can fire webhooks, not just official integrations
Setup
Build it in a few focused steps.
- 1Connect Google Calendar and WhatsApp business accounts to Notis.
- 2Get your Notis webhook URL from the automation creation screen.
- 3Configure your scheduling tool to POST booking data to that webhook URL.
- 4Create a new automation: 'When a webhook fires with booking data, send WhatsApp buttons for Confirm, Reschedule, Send Prep.'
- 5Test by making a booking in your scheduling tool and confirm the buttons arrive on WhatsApp.
Questions about this workflow
What booking data should my scheduling tool send?
At minimum: attendee name, meeting time, and description. Notis will use that data to populate the WhatsApp message.
Can I send different buttons based on meeting type?
Yes. You can set up multiple automations with different button sets for different booking types.
What happens when someone taps 'Send Prep'?
You can configure Notis to send a specific file or message. For example, tapping 'Send Prep' automatically sends your standard agenda document.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Google Calendar to Whatsapp. A trigger fires from one place; an action lands in another.
Google Calendar triggers
Whatsapp actions
Attendee Response Changed
Polling trigger that fires when any attendee's RSVP changes to accepted, declined, or tentative. Returns attendee info and current status.
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.
Event Canceled or Deleted
Triggers when a Google Calendar event is cancelled or deleted. Returns minimal data: event_id, summary (if available), and cancellation timestamp.
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.
Event Starting Soon
Triggers when a calendar event is within a configured number of minutes from starting. Returns event details, time remaining, attendees, and join links when available.
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.
Calendar Event Changes
**SOON TO BE DEPRECATED** - Use Calendar Event Sync (polling trigger) instead. Real-time webhook trigger for calendar event changes. Returns event metadata only. For full event data, use Calendar Event Sync (polling trigger).
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.
Event Created
Polling trigger that fires when a new calendar event is created. Returns event ID, summary, start/end times, and organizer info.
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.
Calendar Event Sync
Polling trigger that returns full event data including details, attendees, and metadata. For real-time notifications with basic info, use Calendar Event Changes (webhook).
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.
Event Updated
Triggers when an existing Google Calendar event is modified. Returns the event ID, change type, and the specific fields that changed with their previous and new values.
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.
Not just Google Calendar and Whatsapp. Any combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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