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.
Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
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.
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.
npm install
npm run buildRelated MCP server: Rime MCP
Variable | Required | Description |
| Yes | URL of your CastleCall instance (e.g. |
| No | TTS provider: |
| When using ElevenLabs | ElevenLabs voice ID |
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"
}
}
}
}announcePlay a text-to-speech announcement on CastleCall.
Parameter | Type | Required | Description |
| string | Yes | The text to announce |
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