Better Call Claude MCP Server

by sns45io.github.sns45/better-call-claudev3.1.3

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

2Node.jsstdioofficial registry

context tax

queued

security

queued

cold start

queued

freshness

Maintained3mo ago

Install Better Call Claude MCP server

claude mcp add better-call-claude -e BETTERCALLCLAUDE_PHONE_PROVIDER='<bettercallclaude-phone-provider>' -e BETTERCALLCLAUDE_PHONE_NUMBER='<bettercallclaude-phone-number>' -e BETTERCALLCLAUDE_PHONE_ACCOUNT_SID='<bettercallclaude-phone-account-sid>' -e BETTERCALLCLAUDE_PHONE_AUTH_TOKEN='<bettercallclaude-phone-auth-token>' -e BETTERCALLCLAUDE_USER_PHONE_NUMBER='<bettercallclaude-user-phone-number>' -e BETTERCALLCLAUDE_OPENAI_API_KEY='<bettercallclaude-openai-api-key>' -- npx -y better-call-claude

{
  "mcpServers": {
    "better-call-claude": {
      "command": "npx",
      "args": [
        "-y",
        "better-call-claude"
      ],
      "env": {
        "BETTERCALLCLAUDE_PHONE_PROVIDER": "<bettercallclaude-phone-provider>",
        "BETTERCALLCLAUDE_PHONE_NUMBER": "<bettercallclaude-phone-number>",
        "BETTERCALLCLAUDE_PHONE_ACCOUNT_SID": "<bettercallclaude-phone-account-sid>",
        "BETTERCALLCLAUDE_PHONE_AUTH_TOKEN": "<bettercallclaude-phone-auth-token>",
        "BETTERCALLCLAUDE_USER_PHONE_NUMBER": "<bettercallclaude-user-phone-number>",
        "BETTERCALLCLAUDE_OPENAI_API_KEY": "<bettercallclaude-openai-api-key>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "better-call-claude": {
      "command": "npx",
      "args": [
        "-y",
        "better-call-claude"
      ],
      "env": {
        "BETTERCALLCLAUDE_PHONE_PROVIDER": "<bettercallclaude-phone-provider>",
        "BETTERCALLCLAUDE_PHONE_NUMBER": "<bettercallclaude-phone-number>",
        "BETTERCALLCLAUDE_PHONE_ACCOUNT_SID": "<bettercallclaude-phone-account-sid>",
        "BETTERCALLCLAUDE_PHONE_AUTH_TOKEN": "<bettercallclaude-phone-auth-token>",
        "BETTERCALLCLAUDE_USER_PHONE_NUMBER": "<bettercallclaude-user-phone-number>",
        "BETTERCALLCLAUDE_OPENAI_API_KEY": "<bettercallclaude-openai-api-key>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "better-call-claude": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "better-call-claude"
      ],
      "env": {
        "BETTERCALLCLAUDE_PHONE_PROVIDER": "<bettercallclaude-phone-provider>",
        "BETTERCALLCLAUDE_PHONE_NUMBER": "<bettercallclaude-phone-number>",
        "BETTERCALLCLAUDE_PHONE_ACCOUNT_SID": "<bettercallclaude-phone-account-sid>",
        "BETTERCALLCLAUDE_PHONE_AUTH_TOKEN": "<bettercallclaude-phone-auth-token>",
        "BETTERCALLCLAUDE_USER_PHONE_NUMBER": "<bettercallclaude-user-phone-number>",
        "BETTERCALLCLAUDE_OPENAI_API_KEY": "<bettercallclaude-openai-api-key>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "better-call-claude": {
      "command": "npx",
      "args": [
        "-y",
        "better-call-claude"
      ],
      "env": {
        "BETTERCALLCLAUDE_PHONE_PROVIDER": "<bettercallclaude-phone-provider>",
        "BETTERCALLCLAUDE_PHONE_NUMBER": "<bettercallclaude-phone-number>",
        "BETTERCALLCLAUDE_PHONE_ACCOUNT_SID": "<bettercallclaude-phone-account-sid>",
        "BETTERCALLCLAUDE_PHONE_AUTH_TOKEN": "<bettercallclaude-phone-auth-token>",
        "BETTERCALLCLAUDE_USER_PHONE_NUMBER": "<bettercallclaude-user-phone-number>",
        "BETTERCALLCLAUDE_OPENAI_API_KEY": "<bettercallclaude-openai-api-key>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

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

Freshness

Maintained — last maintenance signal 3mo ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-07-23 · 3mo ago · GitHub
Latest release
2026-07-23 · 3mo ago · GitHub · v3.1.3
Package published
no data · npm/PyPI
Registry entry updated
2026-07-23 · 3mo ago · official registry · v3.1.3

FAQ

›How do I install the Better Call Claude MCP server in Claude Code?

Run: claude mcp add better-call-claude -e BETTERCALLCLAUDE_PHONE_PROVIDER='<bettercallclaude-phone-provider>' -e BETTERCALLCLAUDE_PHONE_NUMBER='<bettercallclaude-phone-number>' -e BETTERCALLCLAUDE_PHONE_ACCOUNT_SID='<bettercallclaude-phone-account-sid>' -e BETTERCALLCLAUDE_PHONE_AUTH_TOKEN='<bettercallclaude-phone-auth-token>' -e BETTERCALLCLAUDE_USER_PHONE_NUMBER='<bettercallclaude-user-phone-number>' -e BETTERCALLCLAUDE_OPENAI_API_KEY='<bettercallclaude-openai-api-key>' -- npx -y better-call-claude. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Better Call Claude require an API key?

Yes. It expects BETTERCALLCLAUDE_PHONE_PROVIDER, BETTERCALLCLAUDE_PHONE_NUMBER, BETTERCALLCLAUDE_PHONE_ACCOUNT_SID, BETTERCALLCLAUDE_PHONE_AUTH_TOKEN, BETTERCALLCLAUDE_USER_PHONE_NUMBER, BETTERCALLCLAUDE_OPENAI_API_KEY, of which 3 are secrets.

›Can I use Better Call Claude as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Better Call Claude in the official MCP registry?

Yes, as io.github.sns45/better-call-claude.