Voice Bridge MCP Server

Multi-engine TTS for AI coding assistants. Free, 5 engines, no API key needed.

Local serverstdioPython

What is the Voice Bridge MCP server?

Multi-engine TTS for AI coding assistants. Free, 5 engines, no API key needed. That is what the voice bridge mcp server brings to an AI assistant: the same capability, reachable through the Model Context Protocol rather than a separate app or dashboard.

The short version

Multi-engine text-to-speech for AI coding assistants. Speaks responses aloud from Claude Code, Cursor, or VS Code via a Claude Code plugin, MCP server, or CLI pipe.

  • Free by default — -- edge-tts uses Microsoft Neural voices, no API key needed
  • 5 engines — -- edge-tts, ElevenLabs, Kokoro (local ONNX), macOS say, espeak-ng
  • Text safety filter — -- strips code blocks, secrets, file paths, URLs, and markdown before speaking
  • Claude Code plugin — -- Stop hook speaks responses automatically, MCP server for tool-based control
  • Voice discovery — -- browse, filter by gender/locale, and preview voices interactively

The tools it exposes

The server publishes 5 tools. What each one is for:

  • speak — text (required), engine (optional)
  • set_engine — name (required)
  • get_status(none)
  • list_voices — engine (optional)
  • Test — The setup wizard walks you through: detecting installed engines, testing audio output, optionally entering an ElevenLabs API key (if the SDK is

What it needs from you

Configuration is passed through the environment: ELEVENLABS_API_KEY. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.

Voice Bridge is a Python package that plays audio on your local machine. It requires: | Requirement | Details | |---|---| | Python 3.10+ | python3 --version to check | | pip | Usually bundled with Python. On some Linux distros: sudo apt install python3-pip | | Audio output | Speakers or headphones — audio plays locally, not over a network | | Audio player

Getting it running

ai-voice-bridge on npm is all you need. Most clients run it directly, so configuration is a few lines and a restart.

How it compares

This sits in the developer tooling group, where several servers overlap in what they claim to do but differ sharply once you actually set them up. Voice Bridge's toolset — speak, set_engine, get_status and 2 more — is a fair guide to whether it matches your workflow. It is maintained by dwarmerdam; worth a glance at recent repository activity before you build anything load-bearing on it.

We check each listing at SyncDev against the project's documentation before it goes live — if something here drifts out of date, it is a bug worth reporting.

Things to watch

  • It runs with your machine's permissions. That is convenient and also the reason to think about what you point it at before you approve a tool call.
  • Missing credentials fail quietly in some clients — if no tools show up, check the environment block first.
  • Keep per-call confirmation enabled while you learn its behaviour; it is the cheapest safeguard you have.

Available tools

ToolWhat it does
speaktext (required), engine (optional)
set_enginename (required)
get_status_(none)_
list_voicesengine (optional)
TestThe setup wizard walks you through: detecting installed engines, testing audio output, optionally entering an ElevenLabs API key (if the SDK is installed), writing default state, and showing Claude Code integration optio

How to install the Voice Bridge MCP server

{
  "mcpServers": {
    "voice-bridge": {
      "command": "python3",
      "args": ["-m", "voice_bridge.mcp.server"]
    }
  }
}

Configuration as documented by the project. Restart the client after saving.

Configuration

Voice Bridge is a Python package that plays audio on your local machine. It requires: | Requirement | Details | |---|---| | Python 3.10+ | python3 --version to check | | pip | Usually bundled with Python. On some Linux distros: sudo apt install python3-pip | | Audio output | Speakers or headphones — audio plays locally, not over a network | | Audio player

VariableDescriptionRequired
ELEVENLABS_API_KEYCredential the server authenticates with.Yes

Example prompts to try

  • Use Voice Bridge to speak.
  • Use Voice Bridge to set engine.
  • Use Voice Bridge to get status.

Frequently asked questions

It connects Voice Bridge to MCP-compatible AI assistants such as Claude and Cursor, exposing 5 tools (speak, set_engine, get_status, and more) that the assistant can call on your behalf. Instead of copying data back and forth by hand, the assistant works with Voice Bridge directly.