Confirm approved Cal bookings from Slack
Give an explicit Slack approval a clear next step: have Notis confirm the corresponding pending Cal booking.
Trigger
Direct Message Received
Triggered when a new direct message (DM) is sent to a user in Slack. Catches all DMs across all DM channels.
Action
Confirm booking by uid
Confirms an existing booking by `bookinguid` if the booking exists and is in a state allowing confirmation (e.g., not already cancelled or confirmed); this finalizes the booking, does not modify its details, and should typically be performed once.
Why this helps
A booking can remain pending when an approval gets buried among direct messages and nobody returns to Cal to finalize it.
- Reduces the gap between approval and confirmed scheduling.
- Keeps a clear approval message close to the follow-up action.
- Avoids repeatedly checking Cal for a booking that is ready to confirm.
Setup
Build it in a few focused steps.
- 1Connect Slack and Cal to Notis once through the portal.
- 2Create an automation in the portal, or tell Notis in plain language to confirm a pending Cal booking only when a Slack DM clearly approves it and the matching booking is unambiguous.
- 3Select Direct Message Received as the trigger and choose a channel for run reports.
- 4Test with one real approval message tied to an identifiable pending booking.
Questions about this workflow
Can it confirm a booking that is already canceled?
No. Cal confirmation applies only when the booking exists and is in a state that allows confirmation.
Should a vague reply trigger confirmation?
No. The instruction should require clear approval and an unambiguous matching booking.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slack to Cal. A trigger fires from one place; an action lands in another.
Slack triggers
Cal actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Add member to team
Adds a new member to a specified team within an organization by creating a team membership.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Add organization attribute option
Adds a new option to an organization's attribute, requiring a display `value` and a `slug` unique for that attribute.
New Channel Created Trigger
Triggered when a new channel is created in Slack.
Delete oauth client webhook
Permanently deletes a specific webhook subscription of an oauth client in the cal application, stopping its notifications.
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
Cancel booking via uid
Cancels an existing and active cal.com booking using its unique identifier (uid).
Direct Message Received
Triggered when a new direct message (DM) is sent to a user in Slack. Catches all DMs across all DM channels.
Check calendar availability
Retrieves free/busy availability for a specified calendar to aid scheduling without revealing event details; requires an existing, accessible calendar, noting that data granularity can vary.
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Check gcal synchronization status
Call this read-only action to verify the connection and synchronization status of a user's google calendar integration with cal.
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Check ics feed calendar endpoint
Checks an ics feed url (expected as a query parameter) to verify its validity, accessibility, and icalendar data integrity.
Reaction Added Trigger
DEPRECATED: use `SLACK_MESSAGE_REACTION_ADDED` instead. Triggered when a reaction is added to a message in Slack.
Check Stripe status
Verifies if stripe is correctly connected to the cal scheduling system and functional for processing payments, reporting only on the integration's status.
Connect any two apps with Notis in the middle.
Slack and Cal, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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