# MCP CalDAV Server

An Model Context Protocol (MCP) server that connects to a CalDAV server (tested with Baikal) to manage calendars and events.

## Features

- **List Calendars**: View all available calendars.
- **List Events**: 
  - Filter by specific calendar or search **globally across all calendars**.
  - Filter by time range (start/end date).
- **Manage Events**: 
  - Create new events.
  - Update existing events.
  - Delete events.

## Prerequisites

- **Python 3.14** or higher
- **uv** (Universal Python Package Manager)

## Installation

1. Clone the repository:
   ```bash
   git clone <repository_url>
   cd MCP-CalDAV
   ```

2. Install dependencies:
   ```bash
   uv sync
   ```

## Configuration

Create a `.env` file in the root directory with your CalDAV credentials:

```env
CALDAV_URL=http://your-server:port/dav.php
CALDAV_USERNAME=YourUsername
CALDAV_PASSWORD=YourPassword
```

## Usage

### Running Manually
    
#### Standard I/O (Default)
You can run the server directly using `uv`. It communicates via standard input/output (stdio), so running it directly in a terminal will just wait for input.

```bash
uv run src/server.py
```

#### HTTP (SSE)
To run the server over HTTP (Server-Sent Events) - useful for testing with Postman/Inspector or remote access:

```bash
uv run uvicorn src.server:mcp.sse_app --host 0.0.0.0 --port 8000
```
**Endpoint:** `http://localhost:8000/sse`

### Docker Deployment

You can run the server using Docker and Docker Compose. Environment variables are loaded from the `.env` file.

**Build and Run (STDIO Mode by default):**
```bash
docker compose up --build
```

**Switching Modes:**
The container supports two modes via the `MCP_MODE` environment variable:
- `STDIO` (default): Runs the script via standard I/O.
- `SSE`: Runs the HTTP server on port 8000.

To run in SSE mode (e.g., for HTTP access):
```bash
docker run -e MCP_MODE=SSE -p 8000:8000 --env-file .env mcp-caldav
```

### Configuring an MCP Client

To use this with an MCP client (like Claude Desktop or another MCP-compatible app), add the following configuration to your client's settings (e.g., `claude_desktop_config.json`):

```json
{
  "mcpServers": {
    "caldav": {
      "command": "uv",
      "args": [
        "--directory",
        "C:\\Users\\LagoWorkStation\\OneDrive\\Documentos\\MCP-CalDAV",
        "run",
        "src/server.py"
      ]
    }
  }
}
```
*Note: Adjust the absolute path to point to your project directory.*

## Available Tools

- **`get_current_time()`**
  - Returns the current local machine time in ISO format.

- **`list_calendars()`**
  - Returns a list of all calendars the user has access to.

- **`list_events(calendar_name=None, start_date=None, end_date=None)`**
  - Lists events.
  - `calendar_name` (optional): Name of the calendar. If omitted, searches **ALL** calendars.
  - `start_date` (optional): Start of the range (YYYY-MM-DD or ISO).
  - `end_date` (optional): End of the range.

- **`create_event(calendar_name, summary, start_time, end_time, description="", all_day=False, recurrence=None)`**
  - Creates an event.
  - `all_day` (optional, bool): Set to `True` for all-day events (start/end times treated as dates).
  - `recurrence` (optional, str): RRULE string (e.g., `FREQ=DAILY;COUNT=10` or `FREQ=WEEKLY;BYDAY=MO,WE`).

- **`update_event(calendar_name, event_uid, summary=None, start_time=None, end_time=None, description=None, all_day=None, recurrence=None)`**
  - Updates an event by UID.
  - `all_day` (optional, bool): Set to `True`/`False` to change event type.
  - `recurrence` (optional, str): Update the recurrence rule.
- **`delete_event(calendar_name, event_uid)`**
  - Deletes an event by UID.