Cal MCP Server

by aiwerkio.github.AIWerk/mcp-server-calv1.0.6

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

Node.jsstdioofficial registry

context tax

queued

security

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cold start

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freshness

Slowing4mo ago

Install Cal MCP server

claude mcp add cal -e CAL_API_KEY='<cal-api-key>' -- npx -y @aiwerk/mcp-server-cal

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

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

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

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "cal": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@aiwerk/mcp-server-cal"
      ],
      "env": {
        "CAL_API_KEY": "<cal-api-key>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

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

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
CAL_API_KEY	yes	yes	Cal.com API key (prefix cal_ or cal_live_). Create one at Cal.com Settings > Security > API Keys.

Freshness

Slowing — last maintenance signal 4mo ago. The newest of the signals below sets the band.

Last commit (default branch)
no data · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-06-22 · 4mo ago · official registry · v1.0.6

FAQ

›How do I install the Cal MCP server in Claude Code?

Run: claude mcp add cal -e CAL_API_KEY='<cal-api-key>' -- npx -y @aiwerk/mcp-server-cal. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Cal require an API key?

Yes. It expects CAL_API_KEY, of which 1 is a secret.

›Can I use Cal as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Cal in the official MCP registry?

Yes, as io.github.AIWerk/mcp-server-cal.