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DimensionGoogle Calendar MCP ServerGoogle Calendar integration for AI assistantsWhatsApp Channel for Claude CodeDrive your Claude Code session straight from WhatsApp
FMRS50 / 100 · D64 / 100 · C
Reliability5 / 2010 / 20
Security and permissions8 / 2012 / 20
Maintenance7 / 2012 / 20
Documentation16 / 2016 / 20
Setup experience14 / 2014 / 20
Best for
  • Users who want AI assistant integration with Google Calendar
  • Users with multiple Google accounts
  • Users needing advanced event management, such as recurring events and free/busy queries
  • 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
  • Users without a Google Cloud project
  • Users who want a quick setup without OAuth configuration
  • Users who need integration with calendar systems other than Google Calendar
  • 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
  • Read and modify Google Calendar events
  • Access calendars across accounts
  • Create, update, delete, and search events
  • Respond to invitations
  • Check free/busy information
  • 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
  • OAuth tokens can be exposed or expired
  • In test mode, tokens expire after 7 days and need re-authentication
  • Users should be aware of Google Cloud quotas and limits
  • Credentials may be exposed in logs if misconfigured
  • 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
Tools1210