better-call-claude

Voice Calls, SMS, and WhatsApp for Claude Code with cross-channel context sharing.

stdio v3.1.1

Connection Configuration

Add this to your AI agent's MCP config file to connect.

Run in your terminal:

claude mcp add io.github.sns45--better-call-claude -- npx

Transport

stdio

Authentication

None

Version

v3.1.1

Server Name

io.github.sns45/better-call-claude

Last Updated

Feb 27, 2026

How to install and connect this MCP server.

Environment variables you must provide when running this server.

Variable	Description	Required
`BETTERCALLCLAUDE_PHONE_PROVIDER`	Phone provider: 'twilio' or 'telnyx'	Yes
`BETTERCALLCLAUDE_PHONE_NUMBER`	Your phone number in E.164 format	Yes
`BETTERCALLCLAUDE_PHONE_ACCOUNT_SID` secret	Twilio Account SID or Telnyx API Key	Yes
`BETTERCALLCLAUDE_PHONE_AUTH_TOKEN` secret	Twilio Auth Token or Telnyx API Secret	Yes
`BETTERCALLCLAUDE_USER_PHONE_NUMBER`	Your personal phone number in E.164 format (for outbound calls/SMS)	Yes
`BETTERCALLCLAUDE_OPENAI_API_KEY` secret	OpenAI API key for speech-to-text (Whisper) and text-to-speech	Yes
`BETTERCALLCLAUDE_WHATSAPP_NUMBER`	WhatsApp number if different from phone number (e.g., Twilio Sandbox)	Optional
`BETTERCALLCLAUDE_PORT`	Local HTTP server port	Optional
`TAILSCALE_HOSTNAME`	Override Tailscale hostname for webhook URL	Optional
`BETTERCALLCLAUDE_WHATSAPP_PROVIDER`	WhatsApp provider: set to 'baileys' for free WhatsApp via WebSocket (no Twilio needed)	Optional
`BETTERCALLCLAUDE_BAILEYS_AUTH_DIR`	Path to Baileys auth state directory (default: data/baileys-auth)	Optional
`BETTERCALLCLAUDE_WHATSAPP_CHAT_HISTORY_SIZE`	Max WhatsApp chat history messages to retain (default: 50)	Optional