mcp.film / Voice & Dialogue / Cartesia MCP

Cartesia MCP

Officialby Cartesiafreemiumverified Jun 11, 2026

Official Cartesia (Sonic) server: low-latency TTS, voice cloning, infill, localization.

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What it does

Cartesia's official MCP server exposes its Sonic voice stack: TTS, speech-to-text, voice cloning, voice changing, and notably audio infill (generate speech between two existing clips) and voice localization into other languages. Strong for ADR-style dialogue patching and localizing a character's voice across language versions.

Connect

Claude Code

claude mcp add cartesia -e CARTESIA_API_KEY=YOUR_KEY -- uvx cartesia-mcp

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "cartesia": {
      "command": "uvx",
      "args": [
        "cartesia-mcp"
      ],
      "env": {
        "CARTESIA_API_KEY": "YOUR_KEY_HERE"
      }
    }
  }
}

Cursor (.cursor/mcp.json)

{
  "mcpServers": {
    "cartesia": {
      "command": "uvx",
      "args": [
        "cartesia-mcp"
      ],
      "env": {
        "CARTESIA_API_KEY": "YOUR_KEY_HERE"
      }
    }
  }
}

Auth: api_key · env CARTESIA_API_KEY — https://play.cartesia.ai/keys

Tools you'll see

text_to_speechspeech_to_textlist_voicesclone_voicevoice_changelocalize_voiceinfillget_credit_usage

Field notes

Officially supported, on PyPI as cartesia-mcp; ~16 tools. Optional CARTESIA_ADMIN_API_KEY enables account-management tools; OUTPUT_DIRECTORY controls where audio is saved.

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