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better call claude for Grok

io.github.sns45/better-call-claude

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

client:Grok transport:stdio runtime:npm

Install better call claude in Grok

.mcp.json (in your project root)

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

{
  "mcpServers": {
    "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>",
        "BETTERCALLCLAUDE_WHATSAPP_NUMBER": "<BETTERCALLCLAUDE_WHATSAPP_NUMBER>",
        "BETTERCALLCLAUDE_PORT": "<BETTERCALLCLAUDE_PORT>",
        "TAILSCALE_HOSTNAME": "<TAILSCALE_HOSTNAME>",
        "BETTERCALLCLAUDE_WHATSAPP_PROVIDER": "<BETTERCALLCLAUDE_WHATSAPP_PROVIDER>",
        "BETTERCALLCLAUDE_BAILEYS_AUTH_DIR": "<BETTERCALLCLAUDE_BAILEYS_AUTH_DIR>",
        "BETTERCALLCLAUDE_WHATSAPP_CHAT_HISTORY_SIZE": "<BETTERCALLCLAUDE_WHATSAPP_CHAT_HISTORY_SIZE>"
      }
    }
  }
}

Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs

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