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io.github.AIWerk/mcp-server-cal

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

Source code Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package @aiwerk/mcp-server-cal
Claude Code 
claude mcp add mcp-server-cal -e 'CAL_API_KEY=<your cal_api_key>' -- npx -y @aiwerk/mcp-server-cal@1.0.6
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "mcp-server-cal": {
            "command": "npx",
            "args": [
                "-y",
                "@aiwerk/mcp-server-cal@1.0.6"
            ],
            "env": {
                "CAL_API_KEY": "<your cal_api_key>"
            }
        }
    }
}

Environment variables

  • CAL_API_KEY required secret Cal.com API key (prefix cal_ or cal_live_). Create one at Cal.com Settings > Security > API Keys.

Frequently asked questions

What is io.github.AIWerk/mcp-server-cal?

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

How do I install io.github.AIWerk/mcp-server-cal?

It runs on your machine. In Claude Code: claude mcp add mcp-server-cal -e 'CAL_API_KEY=<your cal_api_key>' -- npx -y @aiwerk/mcp-server-cal@1.0.6. For other clients, paste the JSON configuration from this page into their MCP settings.

Does io.github.AIWerk/mcp-server-cal need an API key?

Yes. It expects CAL_API_KEY, which you set in its configuration.

Is io.github.AIWerk/mcp-server-cal open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains io.github.AIWerk/mcp-server-cal?

It is published by AIWerk. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.