Vox

vox

A native macOS MCP server that gives Claude a voice.

Built in Swift. No Node.js. No Python. No Electron. Just a single binary.

{
  "mcpServers": {
    "vox": {
      "command": "/path/to/vox"
    }
  }
}

Then just say: listen — and Claude hears you.

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Tools

Tool	What it does
listen	Activates the mic, waits for you to speak, returns transcript + detected language when silence is detected
speak	Speaks text aloud — ElevenLabs TTS with automatic fallback to macOS system voice

Why Swift + macOS only

• AVFoundation — native mic capture, zero overhead
• SFSpeechRecognizer — Apple on-device speech recognition, works offline, 50+ languages
• NLLanguageRecognizer — automatic language detection per utterance
• AVSpeechSynthesizer — built-in TTS fallback, no API key needed
• Single ~200KB binary. Zero npm install. Zero Python venv.

Requirements

• macOS 13+
• Microphone set as default in System Settings → Sound → Input
• Microphone + Speech Recognition permission for your terminal app
• Optional: ELEVENLABS_API_KEY in ~/.claude/.env for high-quality multilingual TTS

Install

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View the full README on GitHub