Cal MCP Server: Install & Setup

Install Cal in Claude Code

Claude Code

claude mcp add aiwerk-cal -e CAL_API_KEY=... -- npx -y @aiwerk/mcp-server-cal

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "aiwerk-cal": {
      "command": "npx",
      "args": [
        "-y",
        "@aiwerk/mcp-server-cal"
      ],
      "env": {
        "CAL_API_KEY": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the Cal MCP server do?

Cal.com scheduling MCP server: manage bookings, event types, and availability.

Is the Cal MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Cal run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add Cal to Claude Code?

Run: claude mcp add aiwerk-cal -e CAL_API_KEY=... -- npx -y @aiwerk/mcp-server-cal

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