KosmoKrator

scheduling

Cal.com MCP Gateway for AI Agents

Expose Cal.com tools to Claude Code, Cursor, Codex, and other MCP clients through the local KosmoKrator MCP gateway.

6 functions 5 read 1 write Bearer token auth
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Cal.com MCP Gateway

Expose Cal.com to MCP clients with `kosmokrator mcp:serve --integration=cal`.

If the client has never used KosmoKrator before, install it first, then register this integration as a stdio MCP server. The gateway exposes only the selected integration in the example below. 

curl -fsSL https://raw.githubusercontent.com/OpenCompanyApp/kosmokrator/main/install.sh | bash
kosmokrator mcp:gateway:install --integration=cal --write=deny --json
{
  "mcpServers": {
    "kosmokrator-cal": {
      "type": "stdio",
      "command": "kosmo",
      "args": [
        "mcp:serve",
        "--integration=cal",
        "--write=deny"
      ]
    }
  }
}

Serve Manually

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

MCP Tool Names

KosmoKrator exposes integration tools through the gateway with stable names:

MCP toolSource functionType
integration__cal__cal_list_event_types cal.cal_list_event_types Read read
integration__cal__cal_get_event_type cal.cal_get_event_type Read read
integration__cal__cal_list_bookings cal.cal_list_bookings Read read
integration__cal__cal_get_booking cal.cal_get_booking Read read
integration__cal__cal_create_booking cal.cal_create_booking Write write
integration__cal__cal_get_current_user cal.cal_get_current_user Read read

Write Access

Start with --write=deny for read-only MCP clients. Use --write=ask or --write=allow only when the client and workspace are trusted.