Stay in sync with meeting cancellations
Someone posts in Slack: 'We're cancelling the 2pm standup.' Notis finds that event on your calendar and deletes it immediately. You never show up to a cancelled meeting.
Trigger
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
Action
Delete event
Deletes a specified event by `event id` from a google calendar (`calendar id`); this action is idempotent and raises a 404 error if the event is not found.
Why this helps
Meetings get cancelled in Slack but you only find out when you show up at the scheduled time—or when you scramble to check the Slack thread 5 minutes before.
- Never show up to a cancelled meeting because your calendar is instantly updated
- Reduce context-switching by having Notis remove cancelled meetings automatically
- Free up time on your calendar so you see your real availability
Setup
Build it in a few focused steps.
- 1Connect Slack and Google Calendar to Notis
- 2Tell Notis: 'When a message mentions cancelling a meeting, find and delete that event from my calendar'
- 3Notis will use keywords like cancelled, reschedule, postpone, or not happening to trigger the deletion
- 4Test with a cancelled meeting announcement in your #general or project channel
Questions about this workflow
What if the meeting name isn't mentioned exactly?
Notis can search for meetings by time ('the 2pm meeting') or approximate name, and ask for confirmation before deleting.
Is this reversible?
Google Calendar has an undo function, and you can ask Notis to recover recently deleted events if needed.
Can I be more selective about which cancellations to sync?
Yes. You can ask Notis to only delete meetings mentioned in specific channels, or meetings with specific keywords like 'optional'.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slack to Google Calendar. A trigger fires from one place; an action lands in another.
Slack triggers
Google Calendar actions
New Channel Created Trigger
Triggered when a new channel is created in Slack.
Insert Calendar into List
Inserts an existing calendar into the user's calendar list.
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
Update Calendar List Entry
Updates an existing entry on the user\'s calendar list.
Direct Message Received
Triggered when a new direct message (DM) is sent to a user in Slack. Catches all DMs across all DM channels.
Delete Calendar
Deletes a secondary calendar. use calendars.clear for clearing all events on primary calendars.
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Update Calendar
Updates metadata for a calendar.
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Clear Calendar
Clears a primary calendar. this operation deletes all events associated with the primary calendar of an account.
Reaction Added Trigger
DEPRECATED: use `SLACK_MESSAGE_REACTION_ADDED` instead. Triggered when a reaction is added to a message in Slack.
Create Event
Creates an event on a google calendar, needing rfc3339 utc start/end times (end after start) and write access to the calendar. by default, adds the organizer as an attendee unless exclude organizer is set to true.
Reaction Removed Trigger
DEPRECATED: use `SLACK_MESSAGE_REACTION_REMOVED` instead. Triggered when a reaction is removed from a message.
Delete event
Deletes a specified event by `event id` from a google calendar (`calendar id`); this action is idempotent and raises a 404 error if the event is not found.
New Bot Message Received Trigger
DEPRECATED: use `SLACK_CHANNEL_MESSAGE_RECEIVED` with `is_bot_message=true` instead. Triggered when a new bot message is posted to a Slack channel.
Create a calendar
Creates a new, empty google calendar with the specified title (summary).
Connect any two apps with Notis in the middle.
Not just Slack and Google Calendar. Any combination from 985+ integrations.
When this happens · Trigger
Do this · Action
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