Which integrations are available for this server?

Provides cloud-based text-to-speech capabilities using ElevenLabs voices to generate and broadcast audio announcements through the CastleCall system. Enables the triggering of audio announcements on a Raspberry Pi-based home PA system via the CastleCall interface.

How do I use CastleCall MCP?

1. Click on "Install Server". 2. Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state. 3. In the chat, type @ followed by the MCP server name and your instructions, e.g., "@CastleCall MCP announce that dinner is ready" That's it! The server will respond to your query, and you can continue using it as needed. Here is a step-by-step guide with screenshots.

CastleCall MCP

An MCP server that exposes a text-to-speech announce tool for CastleCall — a home PA/announcement system for Raspberry Pi.

Supports Piper (local) and ElevenLabs (cloud) TTS providers via stdio transport.

Setup

npm install
npm run build

Configuration

Variable	Required	Description
`CASTLECALL_URL`	Yes	URL of your CastleCall instance (e.g. `http://192.168.1.50:3000`)
`CASTLECALL_PROVIDER`	No	TTS provider: `piper` (default) or `elevenlabs`
`CASTLECALL_VOICE_ID`	When using ElevenLabs	ElevenLabs voice ID

Usage

Claude Desktop / Claude Code

Add to your MCP settings:

{
  "mcpServers": {
    "castlecall": {
      "command": "node",
      "args": ["/path/to/castlecall-mcp/dist/cli.js"],
      "env": {
        "CASTLECALL_URL": "http://192.168.1.50:3000",
        "CASTLECALL_PROVIDER": "piper"
      }
    }
  }
}

ElevenLabs example:

{
  "mcpServers": {
    "castlecall": {
      "command": "node",
      "args": ["/path/to/castlecall-mcp/dist/cli.js"],
      "env": {
        "CASTLECALL_URL": "http://192.168.1.50:3000",
        "CASTLECALL_PROVIDER": "elevenlabs",
        "CASTLECALL_VOICE_ID": "your-voice-id"
      }
    }
  }
}