Add this to ~/.config/claude/claude_desktop_config.json:

{
  "mcpServers": {
    "thoth": {
      "command": "uvx",
      "args": [
        "mcp-server-thoth",
        "--init",
        "/home/varun/XiaLabSync/thoth",
        "/home/varun/XiaLabSync/slush",
        "/home/varun/XiaLabSync/slush-client"
      ]
    }
  }
}

Then restart Claude Desktop.