Create a booking

Create a booking

Books an attendee into a start time on an event type and returns the booking with its UID.

Note: Send cal-api-version: 2026-02-25 and start in UTC. Answer the event type's required booking questions in bookingFieldsResponses, or the request fails with a 400.

Set up

Use the first option your agent supports.

MCP (official, remote)

Add this server to your agent's MCP settings, then sign in when asked.

{ "mcpServers": { "cal-com": { "url": "https://mcp.cal.com/mcp" } } }

Call the MCP tool create_booking.

Server URL: https://mcp.cal.com/mcp

CLI (official)

Install the command, then confirm it runs.

npm install -g @calcom/cli
calcom --version

Run calcom bookings create.

Set $CAL_API_KEY in your environment first (get a key: https://app.cal.com/settings/developer/api-keys).

API (official)

• Base URL: https://api.cal.com
• Endpoint: POST /v2/bookings
• Auth: send the header Authorization: Bearer $CAL_API_KEY
• Get a key: https://app.cal.com/settings/developer/api-keys
• Docs: https://cal.com/docs/api-reference/v2/introduction

Before anything else, confirm access with the cheapest read-only call, like a list or a search. Never send or change anything to test access.

Rules

• Ask the user before anything that sends messages, costs money, or changes data, and say how many records it touches. One approval covers a batch the user has seen.
• Never print API keys.