dav-mcp

# dav-mcp

**Give your AI agents the power of organization** — Transform them into orchestrating assistants managing calendars, contacts, and tasks.

Built on 26 production-ready tools spanning CalDAV, CardDAV, and VTODO protocols.

[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
[![npm version](https://badge.fury.io/js/dav-mcp.svg)](https://www.npmjs.com/package/dav-mcp)

---

## Quick Start

### Claude Desktop / Cursor (Local)

Add to your MCP config file:

```json
{
  "mcpServers": {
    "dav-mcp": {
      "command": "npx",
      "args": ["-y", "dav-mcp"],
      "env": {
        "CALDAV_SERVER_URL": "https://dav.example.com",
        "CALDAV_USERNAME": "your_username",
        "CALDAV_PASSWORD": "your_password"
      }
    }
  }
}
```

**Config file locations:**
- **macOS**: `~/Library/Application Support/Claude/claude_desktop_config.json`
- **Windows**: `%APPDATA%\Claude\claude_desktop_config.json`
- **Linux**: `~/.config/Claude/claude_desktop_config.json`

Restart Claude Desktop after adding the configuration.

---

### n8n (Remote HTTP)

Start the HTTP server:

```bash
CALDAV_SERVER_URL=https://dav.example.com \
CALDAV_USERNAME=your_username \
CALDAV_PASSWORD=your_password \
BEARER_TOKEN=your-secret-token \
npx dav-mcp --http
```

Then in n8n:
1. Add **AI Agent** node
2. Add **MCP Client Tool** node and connect to AI Agent
3. Configure:
   - **MCP Endpoint**: `http://localhost:3000/mcp`
   - **Authentication**: Bearer
   - **Token**: your-secret-token

**Custom port:**
```bash
npx dav-mcp --http --port=8080
```

---

### Docker

Pull the published image (distroless, runs as non-root, no shell):

```bash
docker run -d --name dav-mcp -p 3000:3000 --env-file .env \
  ghcr.io/philflowio/dav-mcp:latest
```

Tags: `latest`, the exact release (`4.0.0`) and the minor line (`4.0`).
Set `PORT` to serve on a different port; the healthcheck follows it.

Or build from source:

```bash
git clone https://github.com/PhilflowIO/dav-mcp.git
cd dav-mcp
cp .env.example .env
# Edit .env with your credentials
docker-compose up
```

---

## The Orchestration

When partial tools force your AI to improvise, complete tools let it **execute precise operations across all components**.

| Capability | dav-mcp | Most MCPs |
|------------|---------|-----------|
| **Calendar Management** | Full CRUD (12 tools) | Create + list only (2-3 tools) |
| **Contact Management** | Complete CardDAV (8 tools) | Often missing entirely |
| **Task Management** | Full VTODO support (7 tools) | Rarely included |
| **Field-Based Updates** | All RFC properties + custom fields | Rarely available |
| **Free/Busy** | Works on every server (client-side) | Native REPORT, unsupported by most |
| **Server-Side Filtering** | Efficient queries | Dumps all data |
| **Multi-Provider** | Any CalDAV/CardDAV server | Limited provider support |
| **Total Tools** | **27 tools** | **2-6 tools** |

---

## Available Tools (27 Total)

### CalDAV Tools (12 tools)

1. **list_calendars** - List all available calendars
2. **list_events** - List ALL events (use calendar_query for filtered searches)
3. **create_event** - Create a new calendar event
4. **update_event** - PREFERRED: Update any event field (SUMMARY, LOCATION, STATUS, custom X-* properties); move or convert an event with start_date/end_date/all_day
5. **update_event_raw** - Update event with raw iCal data (advanced)
6. **delete_event** - Delete an event permanently
7. **calendar_query** - PREFERRED: Search and filter events efficiently by text, date range, or location
8. **make_calendar** - Create a new calendar collection
9. **update_calendar** - Update calendar properties (display name, description, color, timezone)
10. **delete_calendar** - Permanently delete a calendar and all its events
11. **calendar_multi_get** - Batch fetch multiple specific events by URLs
12. **freebusy_query** - Find free and busy time in a range ("when am I free?"), calculated client-side

### CardDAV Tools (8 tools)

12. **list_addressbooks** - List all available address books
13. **list_contacts** - List ALL contacts (use addressbook_query for filtered searches)
14. **create_contact** - Create a new contact (vCard)
15. **update_contact** - PREFERRED: Update any contact field (FN, EMAIL, TEL, ORG, ADR, custom X-* properties)
16. **update_contact_raw** - Update contact with raw vCard data (advanced)
17. **delete_contact** - Delete a contact permanently
18. **addressbook_query** - PREFERRED: Search and filter contacts efficiently by name, email, or organization
19. **addressbook_multi_get** - Batch fetch multiple specific contacts by URLs

### VTODO Tools (7 tools)

20. **list_todos** - List ALL todos/tasks (use todo_query for filtered searches)
21. **create_todo** - Create a new todo/task with optional due date, priority, status
22. **update_todo** - PREFERRED: Update any todo field (SUMMARY, STATUS, PRIORITY, DUE, PERCENT-COMPLETE, custom X-* properties)
23. **update_todo_raw** - Update todo with raw VTODO iCal data (advanced)
24. **delete_todo** - Delete a todo/task permanently
25. **todo_query** - PREFERRED: Search and filter todos efficiently by status/due date
26. **todo_multi_get** - Batch fetch multiple specific todos by URLs

---

## Real-World Applications

### n8n Automation Workflows
- **Meeting Management**: "Show me all Friday meetings" → calendar_query with date filter returns only relevant events
- **Contact Search**: "Find everyone at Google" → addressbook_query with org filter finds matches efficiently
- **Task Reporting**: "Show overdue high-priority tasks" → todo_query with filters returns specific results
- **Scheduled Cleanup**: Daily cron job deletes completed tasks using targeted queries

### Claude Desktop Integration
- **Quick Event Creation**: "Create team meeting tomorrow 2 PM" → create_event executes immediately
- **Contact Lookup**: "What's Sarah's email?" → addressbook_query with name filter finds contact
- **Calendar Overview**: "What's on my calendar next week?" → calendar_query with date range shows events
- **Calendar Management**: "Create a new calendar called Project Luna" → make_calendar creates collection

---

## Works Across All Major Providers

Works with any CalDAV/CardDAV server that follows RFC 4791 and RFC 6352:

- **Nextcloud** - Full support
- **Baikal** - Full support
- **Radicale** - Full support
- **iCloud** - Works with app-specific password
- **Any RFC-compliant server** - Standard protocol support

---

## Google Calendar (OAuth2)

For Google Calendar, use OAuth2 authentication:

```json
{
  "mcpServers": {
    "dav-mcp": {
      "command": "npx",
      "args": ["-y", "dav-mcp"],
      "env": {
        "AUTH_METHOD": "OAuth",
        "GOOGLE_USER": "your@gmail.com",
        "GOOGLE_CLIENT_ID": "your-client-id",
        "GOOGLE_CLIENT_SECRET": "your-client-secret",
        "GOOGLE_REFRESH_TOKEN": "your-refresh-token"
      }
    }
  }
}
```

---

## Security

- **Input Validation**: All inputs validated with Zod schemas before execution
- **Rate Limiting**: 100 requests/minute per session (HTTP mode)
- **Bearer Auth**: Token authentication for HTTP transport
- **No Credential Storage**: Pass-through only, never logged or cached
- **Structured Logging**: Audit trail with request IDs, no PII exposure
- **CORS Protection**: Whitelist origins, block cross-site attacks

---

## Documentation

- **[MCP Specification](https://modelcontextprotocol.io/specification/2025-03-26)** - Model Context Protocol docs
- **[tsdav Docs](https://tsdav.vercel.app/docs/intro)** - CalDAV/CardDAV library reference
- **[CalDAV RFC 4791](https://datatracker.ietf.org/doc/html/rfc4791)** - CalDAV protocol specification
- **[CardDAV RFC 6352](https://datatracker.ietf.org/doc/html/rfc6352)** - CardDAV protocol specification

---

## Contributing

Pull requests are welcome! Please read [CONTRIBUTING.md](CONTRIBUTING.md) for guidelines.

---

## License

MIT License - see [LICENSE](LICENSE) for details

---

## Acknowledgments

Built with:
- **[tsdav](https://github.com/natelindev/tsdav)** - Excellent TypeScript CalDAV/CardDAV library
- **[tsdav-utils](https://github.com/PhilflowIO/tsdav-utils)** - Field-agnostic utility layer for RFC-compliant field updates
- **[MCP SDK](https://modelcontextprotocol.io)** - Model Context Protocol by Anthropic
- **[ical.js](https://github.com/kewisch/ical.js)** - RFC-compliant iCalendar parser

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**Questions? Issues?** Create a [GitHub issue](https://github.com/PhilflowIO/dav-mcp/issues)

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*Built for AI agents managing calendars, contacts, and tasks*