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DimensionCalDAV MCP ServerExpose CalDAV calendar operations as MCP tools for AI assistants.WhatsApp Channel for Claude CodeDrive your Claude Code session straight from WhatsApp
FMRS53 / 100 · D64 / 100 · C
Reliability7 / 2010 / 20
Security and permissions11 / 2012 / 20
Maintenance13 / 2012 / 20
Documentation12 / 2016 / 20
Setup experience10 / 2014 / 20
Best for
  • AI assistants that need calendar integration
  • Users with CalDAV-compatible servers
  • Scenarios requiring task management
  • Individuals who want to talk to Claude from their personal WhatsApp number
  • Developers comfortable configuring from a terminal and using the Claude Code development flag
  • Automation scenarios needing remote tool approval from a phone
Not for
  • Direct Google Calendar integration (non-CalDAV)
  • Users who need complex calendar permission management
  • Users with high security concerns who don't trust third-party MCP servers
  • Compliance scenarios requiring the official WhatsApp Business API or a Meta developer account
  • Teams needing officially hosted, multi-tenant, or cloud multi-instance deployment
  • Environments unable to guarantee only one client instance at a time
  • Users expecting voice transcription without setting up mlx-whisper themselves
Required permissions
  • Requires access to CalDAV server credentials (username and password)
  • Requires read and write capabilities for calendars and tasks
  • Read and send WhatsApp messages as your personal number
  • Access the local runtime state directory ~/.whatsapp-channel/ (auth, allowlists, group configs, inbox)
  • Read and write local repository files and run scripts (e.g. bun scripts/access.ts, scripts/watchdog.sh)
  • Optional local voice transcription (ffmpeg and an mlx-whisper environment)
Risks and side effects
  • Credential leakage: password may be stored in configuration
  • If the MCP client is maliciously controlled, calendar data could be modified or deleted
  • Messages Claude sends appear from your own number and are indistinguishable to recipients
  • WhatsApp allows one linked-device session per account; running two servers makes them kick each other off
  • Access-control commands are deliberately not MCP tools (terminal-only); exposing them to the message side risks prompt injection
  • Session waking depends on the Claude Code channel extension; other clients get no push
  • A known Claude Code client bug (#37933) may cause messages not to arrive, a client-side issue
  • Launching with --dangerously-load-development-channels carries risk, so verify the source is trustworthy
Supported clientsClaude DesktopClaude Code, Codex, Gemini CLI, Cursor
Tools1010