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Cal.com MCP server

Open-source alternative to Calendly

Cal.com is not a separate install. One Activepieces MCP server exposes it alongside 760+ other apps, behind a single URL.

Start building See the Cal.com integration
Tools
0
Works with
Any MCP client
Auth
API key
License
MIT, open source
Updated
August 2026

About the Cal.com MCP server

Connect Cal.com once in Activepieces and every action it ships becomes a tool your assistant can call, behind the same server URL as the rest of your apps. Your agent reaches Cal.com and 760+ other apps over a single connection, on our cloud or a self-hosted install.

Triggers

Cal.com events your agent can watch

These start a run the moment something happens in Cal.com, so work gets picked up on its own.

  • Booking Cancelled

    Create a webhook to monitor when Booking Cancelled

  • Booking Created

    Create a webhook to monitor when Booking Created

  • Booking Rescheduled

    Create a webhook to monitor when Booking Rescheduled

Cal.com MCP, answered.

No. That is the point of it. One Activepieces server exposes Cal.com alongside every other piece you connect, so your client keeps a single connection.

Yes. Activepieces is open source and free to start, and the MCP server is included on every plan, from the free cloud tier to any self-hosted deployment.

Connect Cal.com in Activepieces, enable the server under Settings → MCP Server, then paste your server URL into your client config. It authenticates over OAuth on first use.

It can watch Cal.com for events and hand the work to steps in other apps inside the same run.

Connections use OAuth2 with limited scopes and are stored under 256-bit encryption, with no API to read them back, so an agent gets scoped access rather than your keys.

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