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Cal.com MCP Integration for Claude Agent SDK

Connect Cal.com to Claude Agent SDK through the local KosmoKrator MCP gateway with scoped tools, credentials, and write policy.

6 functions 5 read 1 write Bearer token auth
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Connect Cal.com to Claude Agent SDK

Give Claude Agent SDK workflows access to KosmoKrator integrations through a local MCP server.

Add a KosmoKrator stdio MCP server to the Claude Agent SDK options. The gateway is local, scoped to this integration, and starts with --write=deny so Claude Agent SDK can inspect read-capable tools without receiving write access by default.

Cal.com MCP Config for Claude Agent SDK

Use a narrow integration list so the agent does not load unrelated tools.

{
  "mcpServers": {
    "kosmokrator-cal": {
      "type": "stdio",
      "command": "kosmo",
      "args": [
        "mcp:serve",
        "--integration=cal",
        "--write=deny"
      ]
    }
  }
}

Run the Gateway Manually

kosmokrator mcp:serve --integration=cal --write=deny

Why Use KosmoKrator Here

Scoped tools

Expose only Cal.com instead of a broad multi-service tool list.

Local credentials

Reuse credentials already configured for the KosmoKrator CLI and Lua runtime.

Write policy

Start read-only, then opt into ask or allow for trusted workspaces.

Cal.com Tools Visible to Claude Agent SDK

Claude Agent SDK sees stable MCP tool names generated from the Cal.com integration catalog.

MCP toolSource functionTypeDescription
integration__cal__cal_list_event_types cal.cal_list_event_types Read List available event types (booking link templates) from Cal.com. Supports filtering by team and pagination.
integration__cal__cal_get_event_type cal.cal_get_event_type Read Get detailed information about a specific event type from Cal.com by its ID.
integration__cal__cal_list_bookings cal.cal_list_bookings Read List bookings from Cal.com with optional filtering by status, event type, and pagination.
integration__cal__cal_get_booking cal.cal_get_booking Read Get detailed information about a specific booking from Cal.com by its ID.
integration__cal__cal_create_booking cal.cal_create_booking Write Create a new booking in Cal.com for a specific event type. Provide the event type, start/end times, and attendee information.
integration__cal__cal_get_current_user cal.cal_get_current_user Read Get the authenticated Cal.com user's profile information, including name, email, and time zone.

Related Cal.com Pages

Cal.com CLIUse direct JSON commands instead of MCP discovery. Cal.com MCPFull gateway reference and MCP tool names. KosmoKrator for Claude Agent SDKClient-level gateway setup.