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.

npm version

Quick Start

Claude Desktop / Cursor (Local)

Add to your MCP config file:

{
  "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:

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:

npx dav-mcp --http --port=8080

Docker

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

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:

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.

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:

{
  "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 - Model Context Protocol docs
• tsdav Docs - CalDAV/CardDAV library reference
• CalDAV RFC 4791 - CalDAV protocol specification
• CardDAV RFC 6352 - CardDAV protocol specification

Contributing

Pull requests are welcome! Please read CONTRIBUTING.md for guidelines.

License

MIT License - see LICENSE for details

Acknowledgments

Built with:

• tsdav - Excellent TypeScript CalDAV/CardDAV library
• tsdav-utils - Field-agnostic utility layer for RFC-compliant field updates
• MCP SDK - Model Context Protocol by Anthropic
• ical.js - RFC-compliant iCalendar parser

Questions? Issues? Create a GitHub issue

Built for AI agents managing calendars, contacts, and tasks