By
Cédric van Ravesteijn
May 11, 2025
What are webhooks and how can they be used for automating workflows
Webhooks are a powerful way to connect Cal.com with other tools, trigger automation, and streamline your workflows with real-time data.
What are webhooks and how can they be used for automating workflows
Modern tools are more connected than ever, but true automation requires more than just integrations. It requires a system that responds in real time to what your users do. That is exactly what webhooks make possible. A webhook is a way for one application to send real-time data to another whenever a specific event occurs. You can think of it as a notification system that listens for events and pushes information to the services that need it. No polling, no delays, and no manual triggers.
If someone books a meeting through your Cal.com page, a webhook can instantly notify your CRM, update a database, send an internal message, or trigger a workflow in another platform.
Why use webhooks in your scheduling workflows
Webhooks make your scheduling smarter and more responsive. Instead of waiting for you to manually check for updates or export data, webhooks automatically send information to other tools the moment something happens.
Here are a few benefits of using webhooks with Cal.com:
Automatically sync bookings and cancellations with your CRM or database
Send alerts to Slack or Microsoft Teams when someone books a high-priority meeting
Trigger workflows in Zapier, Make, or custom automation systems
Collect and analyze real-time scheduling data to improve operations
Webhooks turn your calendar into a real-time data stream you can plug into your broader business ecosystem.
Use webhooks with Cal.com SaaS or platform
Cal.com supports webhook functionality across both our SaaS product and our open platform. Whether you are using Cal.com through the hosted interface or embedding it inside your own application, you can set up webhooks to match your specific use case.
For example:
SaaS users can create webhook endpoints for events like booking created or canceled
Developers building on the platform can use webhooks in combination with our REST API to create deeply customized automations
Self-hosted users have full control over webhook delivery, retry logic, and event filtering
The flexibility of Cal.com makes it easy to integrate webhooks into your workflow regardless of your stack or infrastructure.
Combine webhooks with Cal.com Workflows
Cal.com also offers built-in Workflows that let you automate actions inside the product. When paired with webhooks, you can build even more powerful chains of automation across your internal tools and external services.
For instance:
A customer books a call
Cal.com triggers a webhook to your webhook endpoint
Your backend triggers a Slack message, updates a Notion doc, and kicks off an onboarding workflow
Cal.com also sends a reminder email to the customer and adds a tag to your CRM
By combining internal workflows with webhook-triggered automations, you get a scheduling system that works seamlessly across every part of your business.
Use webhooks for better insight into your scheduling data
Webhooks are not just for automation. They are also a great tool for collecting meaningful data about how and when your clients engage with your scheduling pages.
You can use webhook data to:
Track conversion rates from booking links
Monitor cancellations or reschedules by time or user type
Send booking data into your analytics stack for custom reporting
Detect no-shows and trigger follow-up surveys or rescheduling links
Whether you are managing a small operation or running scheduling across multiple teams, webhook data helps you build a better understanding of how people use your time.
Get started with Cal.com webhooks
Cal.com supports a wide range of webhook event types and offers full documentation to help you get started. You can find our developer guide here:
📘 Webhooks guide on Cal.com Docs
If you are building a custom automation, need help with endpoint setup, or want to explore what is possible with the Cal.com API, our team is happy to support you.
Final thoughts
Webhooks are one of the simplest and most powerful ways to make Cal.com work better for you. They help your scheduling platform talk to the rest of your tech stack, making everything from onboarding to analytics smoother and faster.
Whether you are using Cal.com as a standalone tool or as part of a larger platform, webhooks unlock the real-time power of automation without extra effort.
