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Kokoro Speech

Provides text-to-speech capabilities using the Kokoro TTS model, enabling natural-sounding voice out...

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Updated Dec 23, 2025
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Provides text-to-speech capabilities using the Kokoro TTS model, enabling natural-sounding voice output with customizable playback speed and voice selection through robust error handling and temporary file management.
  1. Open the FastMCP connection interface

    • In the FastMCP UI where you see the server entry and the "Install Now" button, open the connection/config panel for the "speech" MCP server.
  2. Click "Install Now" to open the install / environment dialog

    • Press the ready-made "Install Now" button. When the install dialog or environment-variables panel appears, you will enter the ENV values there.
  3. Add the MCP_DEFAULT_SPEECH_SPEED environment variable

    • Key: MCP_DEFAULT_SPEECH_SPEED
    • Value: a number between 0.5 and 2.0 (default shown in the config: 1.3). Example values: 1.1, 1.3, 1.5.
    • Notes: This is the speed multiplier for TTS. Enter a decimal number (e.g., 1.3).
  4. Add the MCP_DEFAULT_VOICE environment variable

    • Key: MCP_DEFAULT_VOICE
    • Value: voice ID string (default shown: af_bella). Example: af_bella
    • Notes: If you want a different voice, leave this blank temporarily, install, then call the server's list_voices tool to see available voice IDs and update this value.
  5. Save / confirm the environment variables and complete the install

    • Click "Save", "Confirm", or the equivalent action in the FastMCP dialog to apply the ENV values and finish installation.
  6. (Optional) Verify available voices and pick a voice ID

    • If you need a different voice ID, use the server's list_voices tool after installation to list valid voice IDs and update MCP_DEFAULT_VOICE with a chosen ID:
      • Example request (MCP Inspector or raw JSON):
        {"type":"request","id":"1","method":"list_voices","params":}
  7. (Optional) Check model initialization status

    • Use the get_model_status tool to confirm the TTS model is initializing or ready:
      • Example request:
        {"type":"request","id":"1","method":"call_tool","params":{"name":"get_model_status","arguments":}}
  8. No API key required

    • The Speech MCP Server does not require any external API key — only set the two environment variables above as needed.

How to Install Kokoro Speech

Install Kokoro Speech MCP server with one click through FastMCP. Choose your preferred AI development tool below:

Claude Desktop

Click "Claude Desktop" in Quick Start

Cursor IDE

Click "Cursor IDE" in Quick Start

VS Code

Click "VS Code" in Quick Start

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