Manage calendar scheduling, bookings, and availability on Cal.com directly from your AI workflows. Create, reschedule, confirm, and cancel bookings, manage availability schedules and event types, and query open time slots and busy times — built for scheduling assistants and automated booking workflows.
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Encrypted at rest, isolated from the model
Resolved from an AES-256-GCM vault at the moment of the call and attached to the request — the model never sees the secrets.
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Get authenticated user profile from Cal.com
List all event types for the user
Get a specific event type by ID
Create a new event type
Get all bookings for the user
Get a specific booking by ID
Create a new booking
DESTRUCTIVE — REQUIRES EXPLICIT USER CONFIRMATION BEFORE CALLING. Cancel a booking. Permanently cancels the booking identified by `booking_id`, releasing its time slot and notifying the host and every attendee. This action is irreversible — the cancelled booking and its confirmed slot cannot be recovered. NEVER call this tool autonomously or as part of an automated flow. You MUST stop, tell the user exactly which booking will be cancelled and that it is permanent, and wait for their explicit written confirmation before proceeding. The response includes the booking's state before cancellation.
Reschedule an existing booking. Only the fields you provide are changed — others keep their current value. NOTE: this overwrites the current start and end times — the original state is not stored after the call. The response includes both the before and after state so you have a full record of what changed.
Confirm a pending booking. Only the fields you provide are changed — others keep their current value. NOTE: this overwrites the booking's current status — the original state is not stored after the call. The response includes both the before and after state so you have a full record of what changed.
Mark a booking as absent. Only the fields you provide are changed — others keep their current value. NOTE: this overwrites the booking's current attendance state — the original state is not stored after the call. The response includes both the before and after state so you have a full record of what changed.
Get all schedules for the user
Get a specific schedule by ID
Get default schedule
Create a new schedule
Get available time slots
Get busy times from calendars
Get organization memberships
Get organization routing forms
Cal MCP Server is open source. Tell the MewCP maintainers.
One endpoint, the same key, whichever client you use.
~/Library/Application Support/Claude/claude_desktop_config.json (Mac) · %APPDATA%\Claude\claude_desktop_config.json (Windows)
Replace API_KEY with your own key.
Already have an "mcpServers" section in your config? Just add the server entry inside it.
Discovery, routing, credentials, tool scoping and execution logs all happen at the gateway→connections stay ACTIVE with no work from you
Cal runs through a gateway that holds the credentials, scopes the access and records every call.
Managed auth, hosted MCP servers, and every Cal tool your agent needs.
Free to start.
