MCP server for Supertonic 3 on-device text-to-speech
MCP server for Supertonic 3 on-device text-to-speech. Exposed over MCP by the supertonic3 mcp server, that capability becomes something an assistant can invoke while it works, not something you go and do afterwards.
Local, on-device TTS for Claude & Cursor, powered by Supertonic 3. No API key. No cloud. An internal tool open-sourced by Halozen — we build AI compliance intelligence for construction.
Everything the assistant can do here goes through one of these:
speak — Synthesize text to a WAV file; returns absolute path + metadatalist_voices — Built-in voices (voice_id, gender)list_expressions — Inline tags (, , …) with descriptionsThe server ships on PyPI as supertonic3-mcp, so your MCP client can launch it on demand — there is no separate build step. Add the server block to your client's configuration, restart it, and the tools register themselves.
This sits in the AI and media services group, where several servers overlap in what they claim to do but differ sharply once you actually set them up. Supertonic3's toolset — speak, list_voices, list_expressions — is a fair guide to whether it matches your workflow.
We check each listing at SyncDev against the project's documentation before it goes live — if something here drifts out of date, it is a bug worth reporting.
| Tool | What it does |
|---|---|
| speak | Synthesize text to a WAV file; returns absolute path + metadata |
| list_voices | Built-in voices (voice_id, gender) |
| list_expressions | Inline tags (<laugh>, <breath>, …) with descriptions |
{
"mcpServers": {
"supertonic3": {
"command": "uvx",
"args": ["supertonic3-mcp"]
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
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