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Connect Cal.com to Slack

Use 4 documented Cal.com triggers to run 24 documented Slack actions.

4 source triggers
24 target actions
Reverse direction supported

Why Connect Cal.com & Slack?

Start with a Cal.com event

Choose from 4 documented triggers, including Booking Cancelled, Booking Ended, Booking Rescheduled.

Run a Slack action

Send the event into one of 24 documented actions, such as Send Message to Channel, Add Emoji Reaction, Add Reaction.

Map and review the workflow

Choose the fields and conditions for the workflow, then test the result before activation.

Available Triggers & Actions

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Cal.com

Triggers (4)

Booking Cancelled

Emit new event when a booking is cancelled.

polling
Booking Ended

Emit new event when a booking ends.

polling
Booking Rescheduled

Emit new event when a booking is rescheduled.

polling
New Booking Created

Emit new event when a new booking is created.

polling

Actions (7)

Cancel Booking

Cancel an existing booking by its UID. Note: Cal.com v2 replaces the v1 delete endpoint with a cancellation flow; the booking is marked cancelled rather than removed. See the documentation

Create Booking

Create a new booking. See the documentation

Create Booking (V2)

Create a booking using Cal.com API v2 (Option 1). See documentation

Get All Bookings

Retrieve all bookings from Cal.com. See the documentation

Get Bookable Slots

Retrieve available bookable slots between a datetime range. See the documentation

Get Booking

Retrieve a booking by its UID. See the documentation

List Event Type ID Options

Retrieves available options for the Event Type ID field.

Slack logo

Slack

Triggers (9)

New Channel Created (Instant)

Emit new event when a new channel is created.

webhook
New Interaction Events (Instant)

Emit new events on new Slack interactivity events sourced from Block Kit interactive elements, Slash commands, or Shortcuts.

webhook
New Keyword Mention (Instant)

Emit new event when a specific keyword is mentioned in a channel

webhook
New Message In Channels (Instant)

Emit new event when a new message is posted to one or more channels

webhook
New Private Channel Created

Emit new event when a new private channel is created. See the documentation

polling
New Reaction Added (Instant)

Emit new event when a member has added an emoji reaction to a message

webhook
New Saved Message (Instant)

Emit new event when a message is saved. Note: The endpoint is marked as deprecated, and Slack might shut this off at some point down the line.

webhook
New User Added (Instant)

Emit new event when a new member joins a workspace.

webhook
New User Mention (Instant)

Emit new event when a username or specific keyword is mentioned in a channel

webhook

Actions (24)

Send Message to Channel

Send a message to a public or private channel. See the documentation

Add Emoji Reaction

Add an emoji reaction to a message. See the documentation

Add Reaction

Add an emoji reaction to a message. Accepts a channel ID or channel name (resolved automatically). Use **Get Channel History** or **Search** to find the message timestamp. Emoji name should be without colons (e.g. thumbsup, fire, heart). See the documentation

Approve Workflow

Suspend the workflow until approved by a Slack message. See the documentation

Archive Channel

Archive a channel. See the documentation

Browse Files

List files shared in a channel or across the workspace. Accepts a channel ID or channel name (resolved automatically). Filter by file type (e.g. images, pdfs, snippets). Returns file metadata including name, type, size, and download URL. See the documentation

Build and Send a Block Kit Message

Configure custom blocks and send to a channel, group, or user. See the documentation.

Create a Channel

Create a new channel. See the documentation

Create Reminder

Create a reminder. See the documentation

Delete File

Delete a file. See the documentation

Delete Message

Delete a message. See the documentation

Edit Message

Edit an existing message. Accepts a channel ID or channel name (resolved automatically). Requires the message timestamp (ts) from **Get Channel History** or **Post Message**. You can only edit messages posted by the same token/user. See the documentation

Find Message

Find a Slack message. See the documentation

Find User by Email

Find a user by matching against their email. See the documentation

Find User by ID

Find a user by their ID. Returns user profile information including name, email (requires users:read.email scope), timezone, and status. See the documentation

Get Channel Details

Retrieve details for a Slack channel by selecting it or providing an ID. See the documentation

Get Channel History

Read the recent message history from a specific channel. Accepts a channel ID or channel name (resolved automatically). Use this when you want to see a channel's latest messages — unlike **Search** which finds messages by keyword. Returns messages with text, timestamps (ts), reactions, and user IDs. Message timestamps can be used with **Get Thread Replies**, **Edit Message**, and **Add Reaction**. See the documentation

Get Current User

Retrieve comprehensive context about the authenticated Slack member, combining auth.test, users.info, users.profile.get, and team.info payloads. Returns the user’s profile (name variants, email, locale, timezone, status, admin flags), raw auth test data, and workspace metadata (domain, enterprise info, icons). Ideal when you need to confirm which user token is active, tailor messages to their locale/timezone, or ground an LLM in the member’s role and workspace before executing other Slack actions. See Slack API docs.

Get File

Return information about a file. See the documentation

Get Thread Replies

Retrieve all replies in a message thread. Accepts a channel ID or channel name (resolved automatically). Use **Get Channel History** or **Search** to find the parent message's timestamp (thread_ts). Returns the parent message followed by all replies in chronological order. See the documentation

Get User Details

Retrieve the authenticated user's identity and workspace context. Returns user ID, name, email, timezone, profile, and workspace metadata. Call this first in any session to establish who you are — other tools like **Search** and **List Channels** can then filter by your user ID. See the documentation

Invite User to Channel

Invite a user to an existing channel. See the documentation

Kick User

Remove a user from a conversation. See the documentation

List Channels

Return a list of all channels in a workspace. See the documentation

Integration Features

4 documented Cal.com triggers
24 documented Slack actions
Configurable field mapping
Conditional workflow steps
Execution monitoring
A supported Slack to Cal.com direction

Capability Examples

Cal.com trigger → Slack action

Catalog example
Cal.comCal.com

Booking Cancelled

SlackSlack

Send Message to Channel

Slack trigger → Cal.com action

Reverse direction
SlackSlack

New Channel Created (Instant)

Cal.comCal.com

Cancel Booking

How It Works

1

Connect Apps

Authenticate your Cal.com and Slack accounts

2

Choose a Trigger

Select a documented Cal.com event

3

Choose an Action

Select the documented Slack operation to run

Test and Review

Verify field mapping and provider responses before activation

Frequently Asked Questions

Integration Benefits

Trigger-driven Workflows

Start the supported direction from one of 4 documented Cal.com triggers.

Automated Actions

Run one of 24 documented Slack actions after the selected trigger fires.

Provider Authentication

Review the authentication requirements published by each provider before activating the workflow.

Guided Configuration

Select a documented trigger, choose a target action, and map the fields required by the workflow.

Field Mapping

Map the fields exposed by the selected trigger and action, then review the required provider inputs.

Execution Review

Test the workflow and review provider responses before relying on it in production.

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Reverse Integration Available

Also connect Slack to Cal.com for bidirectional automation

View Integration
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All Cal.com Integrations

Explore all available Cal.com connections

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All Slack Integrations

Explore all available Slack connections

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