What is API?
An API (Application Programming Interface) is a set of rules that lets different programs talk to each other. Think of it as a messenger - one app sends a request, the API delivers it to another system, and brings back the response.
How it works in online booking
You connect your CRM to the booking calendar through the API. Every new appointment automatically creates a client record in the CRM with the service type, date, and contact details. No copy-pasting between systems. Calendesk provides an online booking system API with full documentation. If you're migrating from another platform, read about solving the Calendly API limitation. You can also browse ready-made connections on the integrations page.
Benefits
- Automatic data sync between systems eliminates manual entry completely
- Build custom integrations tailored to your exact business workflow
- Pull booking data into any dashboard or reporting tool you already use
Frequently Asked Questions
What can you do with a booking system API?
Check available time slots, create and cancel appointments, manage client records, and sync schedules with external calendars. You can build a custom booking form on your own site, wire it to your CRM, or feed appointment data into a reporting dashboard.
Does using an API require programming skills?
Working directly with an API means making HTTP requests and handling JSON - so yes, basic coding knowledge. If you don't code, tools like Zapier let you connect systems without writing a line. Both approaches get you the same result.
