# Calendar.app [Health: Active]

**Category:** 💻 Developer Tools  
**Repository:** https://github.com/p-l-ta/calendar-mcp  
**GitHub Stars:** 1  
**Views:** 0  
**Installs:** 0  
**Upvotes:** 0  
**Directory Page:** https://allmcps.com/mcp/calendar-app

## Description
List, search, and manage calendar events via macOS Calendar.app across all configured accounts.

## Tools
Capabilities this server exposes over MCP:

- **list_calendars** — List all calendars with name, color, account, and UUID
- **list_events** — List events in a date range, including recurring-event occurrences
- **get_event** — Get full details of a single event by UUID, including attendees
- **search_events** — Search events by text across title, description, and location
- **create_event** — Create a new calendar event
- **update_event** — Update properties of an existing event
- **delete_event** — Permanently delete an event

## Claude Desktop Quick Installation
Install path detected from listing signals. Uses `npx` (confidence: high):

```json
"mcpServers": {
  "calendar-app": {
    "command": "npx",
    "args": ["-y","@p-l-ta/calendar-mcp"]
  }
}
```

## Documentation & README

# calendar-mcp

MCP server that gives Claude (and other MCP hosts) full access to **Calendar.app** on macOS — list, search, create, update, and delete events — across every account configured in Calendar.app (iCloud, Google, Exchange, etc.).

## Prerequisites

- macOS (Calendar.app required)
- Node.js 20+
- An MCP host: [Claude Desktop](https://claude.ai/download) or any stdio MCP client

## Installation

### Claude Desktop — one-click install (recommended)

1. Download `calendar-mcp.mcpb` from the [latest release](https://github.com/p-l-ta/calendar-mcp/releases/latest)
2. Double-click the `.mcpb` file — Claude Desktop installs it automatically
3. Grant the required macOS permissions (see below)

### Manual / other hosts

```bash
npx @p-l-ta/calendar-mcp
```

Or install globally:

```bash
npm install -g @p-l-ta/calendar-mcp
calendar-mcp
```

Point your MCP host at the `calendar-mcp` binary (stdio transport). Example config:

```json
{
  "mcpServers": {
    "calendar-app": {
      "command": "npx",
      "args": ["@p-l-ta/calendar-mcp"]
    }
  }
}
```

## Required macOS permissions

Grant these to the application that runs the MCP host (Claude Desktop, etc.):

| Permission | Where to grant |
|---|---|
| **Full Disk Access** | System Settings → Privacy & Security → Full Disk Access |
| **Automation → Calendar** | System Settings → Privacy & Security → Automation |

The MCP server process inherits permissions from the host application that launches it.

## Tools

| Tool | Description |
|---|---|
| `list_calendars` | List all calendars with name, color, account, and UUID |
| `list_events` | List events in a date range, including recurring-event occurrences |
| `get_event` | Get full details of a single event by UUID, including attendees |
| `search_events` | Search events by text across title, description, and location |
| `create_event` | Create a new calendar event |
| `update_event` | Update properties of an existing event |
| `delete_event` | Permanently delete an event |

## How it works

- **Reads** (`list_calendars`, `list_events`, `search_events`, `get_event`) — query Calendar's SQLite database directly for fast, structured results across all accounts. Recurring events are expanded correctly via Calendar's `OccurrenceCache` table.
- **Writes** (`create_event`, `update_event`, `delete_event`) — driven by AppleScript automation against Calendar.app, so changes sync to all connected accounts (iCloud, Google, Exchange) just as if you'd made them in the app.

## Development

```bash
npm install
npm run dev          # tsx watch — live reload
npm run build        # compile TypeScript → dist/
npm run mcpb         # build Claude Desktop extension → build/calendar-mcp.mcpb
npm run smoke        # smoke-test all 7 tools against live Calendar.app data
```

> **Note:** `npm run smoke` requires Terminal.app (or your terminal emulator) to have Full Disk Access, since it reads Calendar.sqlitedb directly.

Interactive MCP testing:

```bash
npm run build
npx @modelcontextprotocol/inspector node dist/server.js
```

## Privacy Policy

calendar-mcp is a **local** MCP server that runs entirely on your Mac. It has no backend, no telemetry, and makes no network requests of its own.

**What it accesses:**
- Calendar's SQLite database (`~/Library/Group Containers/group.com.apple.calendar/Calendar.sqlitedb`) — read-only, used for list/search queries
- Calendar.app via AppleScript — to create, update, and delete events

**What it does NOT do:**
- Collect, store, or transmit any data outside your Mac
- Connect to any external server or API
- Log calendar data anywhere

All calendar data stays on your device and is only passed to the MCP host (Claude Desktop or another client) as part of normal tool responses. You control exactly which tools Claude can invoke.

## License

MIT