LocalFree

NIRA REPL MCP server

pachote/nira-repl

Secure code execution sandbox for Claude — run Python, JavaScript, and shell commands

Source code

Install NIRA REPL in Claude Code

Claude Code
claude mcp add nira-repl -- uvx nira-repl
mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)
{
  "mcpServers": {
    "nira-repl": {
      "command": "uvx",
      "args": [
        "nira-repl"
      ]
    }
  }
}

Frequently asked questions

What does the NIRA REPL MCP server do?

Secure code execution sandbox for Claude — run Python, JavaScript, and shell commands

Is the NIRA REPL MCP server free?

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Does NIRA REPL run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add NIRA REPL to Claude Code?

Run: claude mcp add nira-repl -- uvx nira-repl

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