NIRA REPL MCP

io.github.pachotePublished by GitHub account pachotev1.0.1Updated Oct 24, 2026

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

VerifiedSTDIODesktop onlyDeveloper Tools

Server details

Identifier: io.github.pachote/nira-repl
Transport: STDIO
Runtime: Desktop only
Trust: Verified
Published: Sep 16, 2026

Security note

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Overview

AI-generated overview

A local sandbox MCP server that lets an assistant run Python, JavaScript and shell commands in a secure code execution environment.

What you can do: Run Python code in a sandboxed execution environment
Run JavaScript code in the same sandbox
Execute shell commands
Act as a REPL-style execution layer the assistant can call while working
When to use it: Useful when you want an assistant to actually execute code or shell commands rather than only write them, for example to test snippets, compute results, or check command output on your own machine.
Requirements: Runs as a local stdio process installed from the PyPI package nira-repl, so a Python environment on the user's machine is needed. It is desktop-only and not available as a web executable. No authentication, environment variables or headers are declared.

Before you install

It executes code and shell commands on your machine, so anything the assistant runs has the same reach as your local user account; review what it is asked to run. The description calls it a secure sandbox, but no details on its isolation are provided here.

Installation

In SourceWeft

Open NIRA REPL MCP in the dashboard and add it to a workspace.
Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

This repository has no README.

Tools

SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

v1.0.1LatestSep 16, 2026

Score

25% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

Reached in the last 30 days25 pts
Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.
Auth declared10 pts
Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.
Tools listed15 pts
Answer tools/list without a credential, or ship a package that starts in a sandbox without one.
DescriptionRequired15 pts
Logo10 pts
Documentation15 pts
Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.
License10 pts
Declare a license in the repository or the registry entry.