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Cal.com
Cal.com
1. Choose trigger event
Slack
Slack
2. Choose action
1. Select the event
Setup
Test
Cal.com
Choose a trigger event
Choose a trigger
A trigger is the event that starts your Zap—like a "Booking Cancelled" from Cal.com.
Add your action
An action happens after the trigger—such as "Add Reaction" in Slack.
You’re connected!
Zapier seamlessly connects Cal.com and Slack, automating your workflow.
Supported triggers and actions
Zapier helps you create workflows that connect your apps to automate repetitive tasks. A trigger is an event that starts a workflow, and an action is an event a Zap performs.
Create a new record or update an existing record in your app.
Conversation ID
Required
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Channel
Required
Users
Required
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Title
Content
Channel ID
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Send Multi Message
Message Text
Required
Send as a bot?
Include a link to this automation?
Attach Image by URL
Auto-Expand Links?
Link Usernames and Channel Names?
Schedule At
Zap_id
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Allowed_edit_copy
Conversation ID
Required
Message TS (ID)
Required
Posted By
Content Type
Reply Broadcast
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Channel
Required
Add Zapier app to channel automatically?
Message Text
Required
Send as a bot?
Bot Name
Bot Icon
Include a link to this automation?
Attach Image by URL
Auto-Expand Links?
Link Usernames and Channel Names?
Schedule At
Zap_id
File
Thread
Send Channel Message?
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Channel
Required
Topic
Required
Topic set by
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Status Text
Status Emoji
Expiration Time
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Remove User from Channel
This action removes a specified user from a specified channel in Slack.
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Edit Message
This action updates a specific message sent by the same Authenticated user on Slack. You need to provide the Channel ID, the Timestamp of the message to be edited, and the new text for the message.
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Find Public Channel
This action will find a public channel in Slack using either the channel's ID or name.
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Delete Message
This action deletes an existing message in a specific channel on Slack. You need to provide the channel ID and the message timestamp as inputs.
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Create a new record or update an existing record in your app.
Conversation ID
Required
Scheduled As
Required
Scheduled Message ID
Required
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Channel
Required
Add Zapier app to channel automatically?
Message Text
Required
Send as a bot?
Bot Name
Bot Icon
Include a link to this automation?
Attach Image by URL
Auto-Expand Links?
Link Usernames and Channel Names?
Schedule At
File
Thread
Send Channel Message?
Zap_id
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Allowed_delete_copy
Conversation ID
Required
Message TS (ID)
Required
Posted By
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Canvas ID
Required
Operation
Required
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Channel Name
Required
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Status_copy
Approval request message
Required
Send message as
Required
Approval type
Required
Zap_id
Include a link to this automation?
Approve button URL
Approve button label
Add decline button
Add details button
Require confirmation
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
First Name
Last Name
Title
Email
Display Name
User
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Stop on error
Required
HTTP Method
Required
URL
Required
Query string parameters
Additional request headers
Body
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Get Message by Timestamp
This action retrieves a specific message from a conversation history in Slack using the message's timestamp.
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Retrieve Thread Messages
This action retrieves all the messages sent to a specific thread in a selected channel.
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Create Private Channel
This action creates a private channel in Slack.
Action
This is an event a Zap performs.
Write
Create a new record or update an existing record in your app.
Conversation ID
Required
Action
This is an event a Zap performs.
Search
Find existing data in your app
Conversation ID
Required
Message ID (ts)
Required
Action
This is an event a Zap performs.
Search
Find existing data in your app
Conversation ID
Required
Message TS (ID)
Required
Action
This is an event a Zap performs.
Search
Find existing data in your app
Email
Required
Return Raw Results?
Action
This is an event a Zap performs.
Search
Find existing data in your app
Full Name
Required
Return Raw Results?
Action
This is an event a Zap performs.
Search
Find existing data in your app
For AI agents & developers
Use Cal.com and Slack with AI agents and code
Beyond Zap workflows. Call Cal.com and Slack actions directly from your AI client or your codebase, using the same 9,000+ app integrations Zapier already runs.
No code
Connect via Zapier MCP
Expose Cal.com and Slack actions as tools in any MCP client. Authenticate once, then call them in natural language.
Example actions on this page
Add Reaction
Works with
Claude · ChatGPT · Cursor · any MCP-compatible client
There is no Python package yet. SDK is TypeScript-only (@zapier/zapier-sdk). The MCP server URL is personal to your account; get it at zapier.com/mcp.
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Customers who say using Zapier has made them better at their job
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Customers have created over 25 million Zaps on the platform
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The average user takes less than 6 minutes to set up a Zap
Connect Cal.com and Slack to integrate crucial parts of your business
With Zapier, you can integrate everything from basic data entry to end-to-end processes. Here are some of the business-critical workflows that people automate with Zapier.
Automate your lead management and improve conversions
With Zapier, you can automate every part of your lead funnel and give yourself the best chance at converting leads. Automate everything from lead capture to outreach to reporting—and close more deals as a result.
Create more impactful campaigns with automation
Measuring campaign performance across platforms can get chaotic. Plus, digging up the right metrics costs you precious time and effort. With Zapier, you can create a centralized view of your performance, skillfully manage your lists, and ensure your campaigns drive ROI across the business.
Provide world-class support with a little help from automation
Support reps can't be productive when they have to track down crucial information for every incident or ticket. With Zapier, you can automatically send your reps the context they need to resolve tickets quickly and create a seamless customer experience.
Automate your way to actionable, up-to-date data
The days of manually exporting and importing data are over. With Zapier, you can send data where it needs to go, in the format you need it—so you can centralize your data and unlock more insights.
Resolve incidents faster with automation
Your technical support team wants to focus on tech tickets rather than admin work. With Zapier, you can automate everything from ticket creation to routing to inter-team communication—eliminating friction from incident management and increasing speed to resolution.
Learn how to automate Slack on the Zapier blog
Make work flow with AI
Level up your Cal.com to Slack integration with AI. Extract, summarize, and transform your integration data with leading AI models like OpenAI, Anthropic, and more.
Frequently Asked Questions about Cal.com + Slack integrations
New to automation with Zapier? You're not alone. Here are some answers to common questions about how Zapier works with Cal.com and Slack
How can I integrate Cal.com with Slack?
You can integrate Cal.com with Slack using Zapier to automatically send notifications to your Slack channels when new events are created or updated in Cal.com.
What triggers can I use with the Cal.com and Slack integration?
With the integration, you can set up triggers such as a new event creation, event updates, or cancellations in Cal.com, which will then send a message to your specified Slack channel.
What actions can be performed in Slack through this integration?
The integration allows you to perform actions like sending messages to a specific channel or user in Slack whenever certain events occur in Cal.com.
Can I customize the messages sent to Slack from Cal.com?
Yes, you can customize the message content that is sent to Slack by setting up specific templates and using dynamic fields from the Cal.com event data.
Is it possible to use multiple channels for notifications through this integration?
Yes, you can configure multiple workflows in our system so that notifications are sent to different channels depending on the type of event or other criteria defined.
What should I do if notifications aren’t being sent from Cal.com to Slack?
First, check if all trigger conditions are met and your Zapier connection settings. Ensure both applications have enabled permissions and re-test your workflows.
How do I test the Cal.com and Slack integration before going live?
You can use our testing mode in Zapier where you run sample events through your workflow. This helps ensure everything is working as expected without impacting actual data or users.
About Cal.com
Cal.com simplifies scheduling for individuals, teams, and developers with powerful features and integrations that make booking effortless.
Slack is a platform for team communication: everything in one place, instantly searchable, available wherever you go. Offering instant messaging, document sharing and knowledge search for modern teams.
