ElevenLabs Streaming MCP Server

A high-performance MCP (Model Context Protocol) server for ElevenLabs text-to-speech with streaming support!

Features

• ✅ Official ElevenLabs SDK integration

• ✅ True streaming - no file saving!

• ✅ Direct pipe to ffplay for instant playback

• ✅ No token limit issues

• ✅ Environment-based configuration

• ✅ Voice listing support

• ✅ Works with npx - no installation needed!

Quick Start

Add to your .mccp.json:

{
  "mcpServers": {
    "elevenlabs": {
      "command": "npx",
      "args": ["elevenlabs-streaming-mcp-server"],
      "env": {
        "ELEVENLABS_API_KEY": "your_api_key_here",
        "ELEVENLABS_VOICE_ID": "Au8OOcCmvsCaQpmULvvQ",
        "ELEVENLABS_MODEL_ID": "eleven_flash_v2",
        "ELEVENLABS_STABILITY": "0.5",
        "ELEVENLABS_SIMILARITY_BOOST": "0.75",
        "ELEVENLABS_STYLE": "0.1"
      }
    }
  }
}

Environment Variables

• ELEVENLABS_API_KEY (required): Your ElevenLabs API key

• ELEVENLABS_VOICE_ID: Default voice ID (default: Rusty Butter's voice)

• ELEVENLABS_MODEL_ID: Model to use (default: eleven_flash_v2)

• ELEVENLABS_STABILITY: Voice stability 0-1 (default: 0.5)

• ELEVENLABS_SIMILARITY_BOOST: Voice similarity 0-1 (default: 0.75)

• ELEVENLABS_STYLE: Style exaggeration 0-1 (default: 0.1)

Available Tools

generate_audio

Generates audio from text with streaming support:

• text (required): Text to convert to speech

• voice_id: Override default voice

• model_id: Override default model

• play_audio: Whether to auto-play (default: true)

list_voices

Lists all available ElevenLabs voices with their IDs and descriptions.

Development

npm install
npm run dev   # Run with hot reload
npm run build # Build for production

Publishing

npm publish

Built by Rusty Butter for MAXIMUM STREAMING AUTONOMY! 🚀