once for Claude Desktop

io.github.aurumflux20/once-kernel

Run a side effect exactly once under retries, redelivery, and concurrent workers.

client:Claude Desktop transport:stdio runtime:pypi

Install once in Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json · windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "once-kernel": {
      "command": "uvx",
      "args": [
        "once-kernel"
      ]
    }
  }
}

Settings → Developer → Edit Config opens this file. Restart the app after saving. Claude Desktop docs