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Natural voice conversations for AI assistants - STT/TTS via MCP
About
Natural voice conversations for AI assistants - STT/TTS via MCP
Security Report
VoiceMode is a voice interaction MCP server with reasonable security posture for its purpose. The codebase properly manages API credentials via environment variables, implements appropriate input validation for user-supplied parameters, and has no evidence of malicious patterns. However, there are moderate concerns around subprocess execution for system integration, unvalidated file path handling in audio saving, and the lack of comprehensive error handling in some security-sensitive areas. Permissions align well with the server's functionality (audio I/O, network access for TTS/STT services, limited filesystem access). Supply chain analysis found 19 known vulnerabilities in dependencies (3 critical, 5 high severity). Package verification found 1 issue.
4 files analyzed · 28 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
What You'll Need
Set these up before or after installing:
Environment variable: OPENAI_API_KEY
Environment variable: VOICEMODE_DEBUG
Environment variable: VOICEMODE_SKIP_TTS
Environment variable: VOICEMODE_PREFER_LOCAL
Environment variable: VOICEMODE_AUDIO_FORMAT
Environment variable: VOICEMODE_WHISPER_MODEL
Environment variable: VOICEMODE_DISABLE_SILENCE_DETECTION
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"dev-voicemode-voicemode": {
"env": {
"OPENAI_API_KEY": "your-openai-api-key-here",
"VOICEMODE_DEBUG": "your-voicemode-debug-here",
"VOICEMODE_SKIP_TTS": "your-voicemode-skip-tts-here",
"VOICEMODE_AUDIO_FORMAT": "your-voicemode-audio-format-here",
"VOICEMODE_PREFER_LOCAL": "your-voicemode-prefer-local-here",
"VOICEMODE_WHISPER_MODEL": "your-voicemode-whisper-model-here",
"VOICEMODE_DISABLE_SILENCE_DETECTION": "your-voicemode-disable-silence-detection-here"
},
"args": [
"voice-mode"
],
"command": "uvx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
VoiceMode
Natural voice conversations with Claude Code (and other MCP capable agents)
VoiceMode enables natural voice conversations with Claude Code. Voice isn't about replacing typing - it's about being available when typing isn't.
Perfect for:
- Walking to your next meeting
- Cooking while debugging
- Giving your eyes a break after hours of screen time
- Holding a coffee (or a dog)
- Any moment when your hands or eyes are busy
See It In Action
Quick Start
Requirements: Computer with microphone and speakers
Option 1: Claude Code Plugin (Recommended)
The fastest way for Claude Code users to get started:
# Add the VoiceMode marketplace
claude plugin marketplace add mbailey/voicemode
# Install VoiceMode plugin
claude plugin install voicemode@voicemode
## Install dependencies (CLI, Local Voice Services)
/voicemode:install
# Start talking!
/voicemode:converse
Option 2: Python installer package
Installs dependencies and the VoiceMode Python package.
# Install UV package manager (if needed)
curl -LsSf https://astral.sh/uv/install.sh | sh
# Run the installer (sets up dependencies and local voice services)
uvx voice-mode-install
# Add to Claude Code
claude mcp add --scope user voicemode -- uvx --refresh --from voice-mode voicemode-mcp-launcher
# Optional: Add OpenAI API key as fallback for local services
export OPENAI_API_KEY=your-openai-key
# Start a conversation
claude converse
For manual setup, see the Getting Started Guide.
Features
- Natural conversations - speak naturally, hear responses immediately
- Works offline - optional local voice services (Whisper STT, Kokoro TTS)
- Low latency - fast enough to feel like a real conversation
- Smart silence detection - stops recording when you stop speaking
- Privacy options - run entirely locally or use cloud services
Compatibility
Platforms: Linux, macOS, Windows (native or WSL), NixOS Python: 3.10-3.14
Configuration
VoiceMode works out of the box. For customization:
# Set OpenAI API key (if using cloud services)
export OPENAI_API_KEY="your-key"
# Or configure via file
voicemode config edit
See the Configuration Guide for all options.
Permissions Setup (Optional)
To use VoiceMode without permission prompts, add to ~/.claude/settings.json:
{
"permissions": {
"allow": [
"mcp__voicemode__converse",
"mcp__voicemode__service"
]
}
}
See the Permissions Guide for more options.
Local Voice Services
For privacy or offline use, install local speech services:
- Whisper.cpp - Local speech-to-text
- Kokoro - Local text-to-speech with multiple voices
These provide the same API as OpenAI, so VoiceMode switches seamlessly between them.
Installation Details
Ubuntu/Debian
sudo apt update
sudo apt install -y ffmpeg gcc libasound2-dev libasound2-plugins libportaudio2 portaudio19-dev pulseaudio pulseaudio-utils python3-dev
WSL2 users: The pulseaudio packages above are required for microphone access.
Fedora/RHEL
sudo dnf install alsa-lib-devel ffmpeg gcc portaudio portaudio-devel python3-devel
macOS
brew install ffmpeg node portaudio
NixOS
# Use development shell
nix develop github:mbailey/voicemode
# Or install system-wide
nix profile install github:mbailey/voicemode
From source
git clone https://github.com/mbailey/voicemode.git
cd voicemode
uv tool install -e .
NixOS system-wide
# In /etc/nixos/configuration.nix
environment.systemPackages = [
(builtins.getFlake "github:mbailey/voicemode").packages.${pkgs.system}.default
];
Troubleshooting
| Problem | Solution |
|---|---|
| No microphone access | Check terminal/app permissions. WSL2 needs pulseaudio packages. |
| UV not found | Run curl -LsSf https://astral.sh/uv/install.sh | sh |
| OpenAI API error | Verify OPENAI_API_KEY is set correctly |
| No audio output | Check system audio settings and available devices |
Save Audio for Debugging
export VOICEMODE_SAVE_AUDIO=true
# Files saved to ~/.voicemode/audio/YYYY/MM/
Documentation
- Getting Started - Full setup guide
- Configuration - All environment variables
- Whisper Setup - Local speech-to-text
- Kokoro Setup - Local text-to-speech
- Development Setup - Contributing guide
Full documentation: voicemode.dev
Links
- Website: voicemode.dev
- GitHub: github.com/mbailey/voicemode
- PyPI: pypi.org/project/voice-mode
- YouTube: @getvoicemode
- Twitter/X: @getvoicemode
- Newsletter:
License
MIT - A Failmode Project
mcp-name: dev.voicemode/voicemode
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