What Are API & Webhooks? Definition & Examples
Technical interfaces that allow developers to programmatically interact with scheduling data and receive real-time event notifications.
Definition
APIs (Application Programming Interfaces) allow external applications to create, read, update, and manage scheduling data programmatically. Webhooks are real-time notifications sent to your systems when events occur (new booking, cancellation, etc.). Together, they enable custom integrations, automated workflows, and embedded scheduling in custom applications beyond what standard integrations provide. Understanding this concept is essential for businesses evaluating scheduling technology, as it directly impacts how efficiently teams manage their time and how smoothly clients move through the booking process.
API & Webhooks
API call to create a booking from your custom CRM
Webhook notification when a booking is cancelled
Fetching availability via API to display in a mobile app
Syncing booking data to a custom database
Workflow example: API & Webhooks
- 1
A marketing agency on the Pro plan wants every new client booking to appear in its internal project tracker.
- 2
A developer creates an API token under Settings → API Tokens and registers a webhook URL for booking events.
- 3
When a client books, the event.created webhook sends the booking details to the agency's endpoint.
- 4
The agency's script creates a project in the tracker, and a later event.cancelled webhook archives it if the client cancels.
Why API & Webhooks Matters
Standard integrations cover common use cases, but unique business processes require custom connections. APIs and webhooks let developers build exactly what's needed. They're essential for enterprises, custom apps, and advanced automation.
SchedulingKit — API & Webhooks
On the Pro plan and above, SchedulingKit provides a REST API and webhooks. You create bearer tokens under Settings → API Tokens. Webhooks can notify your systems about booking events (created, updated, cancelled, rescheduled, reminder), payment events (completed, failed, refunded) and completed AI receptionist calls. If you would rather not write code, Zapier (also Pro and above) connects SchedulingKit to other apps such as CRMs and spreadsheets.
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When this isn't for you
This definition page is reference-only. If you came here looking for software to handle api & webhooks, head to /scheduling-software or /features instead. Skip this page if you're already familiar with the term.