Send Event Changes as Interactive WhatsApp Lists
Changed the time and location? Notis sends an interactive list showing Old: 2 PM | New: 3 PM, plus all other changes, so attendees see exactly what's different.
Trigger
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.
Action
Send interactive list
Send an interactive list message to a whatsapp number. list messages allow users to select from up to 10 options in a structured format. great for menus, catalogs, or choices. note: the message will be delivered to the recipient only if they have texted first.
Why this helps
Attendees miss small reschedules because written change notifications blend into their message stream; they show up to the wrong time.
- Crystal clear: side-by-side old/new values eliminate guesswork
- Scannable: list format makes changes obvious at a glance instead of parsing text
- Reduces errors: attendees see all changes in one place and can't miss something
Setup
Build it in a few focused steps.
- 1Connect Google Calendar and WhatsApp business accounts to Notis.
- 2Create a new automation: 'When an event is updated, send attendees an interactive WhatsApp list showing what changed: Old Time, New Time, Old Location, New Location.'
- 3Set the trigger to 'Event Updated'.
- 4Pick your run-report channel.
- 5Test by modifying a meeting's time and location, then verify attendees receive a list highlighting both changes.
Questions about this workflow
Will the list show only the fields that changed or all event details?
You can customize it. Default is to show only changed fields (time, location, etc.). You can also request a full side-by-side comparison if you prefer.
How many changes can fit in a WhatsApp list message?
Up to 10 items. If an event has more than 10 fields that changed, Notis can send multiple lists or a summary.
Can I highlight the most important changes first?
Yes. Tell Notis: 'Show time and location first, then other changes' so critical info is at the top.
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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