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Cal ID gives you a REST API to manage event types, availability, bookings, slots, teams, and webhooks programmatically. Every request is authenticated with a bearer API key, so you can drive scheduling from your own apps, scripts, and backends. The base URL for all endpoints is https://api.cal.id.

API Reference

Every endpoint with full schemas and a live “Try it” playground.

Get your API key

Create and manage the keys that authenticate your requests.

Find your Event Type ID

Locate the IDs you need to reference in API calls.

Webhooks

Subscribe to booking and meeting events in real time.

API integration overview

Servers, authentication, and how the API fits together.
Authenticate every request by sending your key in the header: Authorization: Bearer YOUR_API_KEY.