code-sandbox

Execute JavaScript code safely in a sandboxed VM with strict globals and timeouts.

3|3|Updated Feb 5, 2026
One-click install
npx skills add https://github.com/XPRNetwork/xpr-agents --skill code-sandbox
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: code-sandbox
Source: https://github.com/XPRNetwork/xpr-agents/tree/main/openclaw/starter/agent/skills/code-sandbox
Command: npx skills add https://github.com/XPRNetwork/xpr-agents --skill code-sandbox

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Running code for data processing and computation securely in a sandboxed JavaScript VM, removing risk to the host.

Core Features & Use Cases

  • Sandboxed execution tools: execute_js runs arbitrary code with input and captures logs, without network or filesystem access.
  • Quick evaluations: eval_expression evaluates a single expression with immediate results.
  • Safe-by-default: strict globals and restricted environment prevent access to process, require, or external resources.
  • Use Case: Train, validate, and prototype data transformations or algorithms inside a controlled runtime.

Quick Start

Provide JavaScript code via the input parameter and receive the result and logs from the sandboxed execution.

Frequently Asked Questions about code-sandbox

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I execute JavaScript code safely in a sandboxed VM?

You execute JavaScript code safely in a sandboxed VM by applying isolated execution tools that run algorithms or data transformations without network or filesystem access. This approach captures logs and outputs without risking external resources.

Can I run data transformation algorithms in a restricted JavaScript environment?

Yes, you can run data transformation algorithms in a restricted JavaScript environment. The sandbox applies strict globals and a controlled runtime to validate and prototype computations while preventing access to process or require functions.

What is the best way to evaluate a single JavaScript expression with immediate results?

The best way to evaluate a single JavaScript expression with immediate results is applying a quick evaluation tool. This function processes individual expressions directly within the secure sandbox, returning fast outputs for quick computations.

Does the secure code execution environment have access to external resources?

No, the secure code execution environment does not have access to external resources. It applies strict sandbox globals and restricted environments to prevent access to process, require, network, or filesystem resources during code execution.

Why does my sandboxed JavaScript execution time out?

Your sandboxed JavaScript execution times out because the environment applies execution timeouts to prevent infinite loops. This constraint ensures that quick computations and algorithm testing within the isolated VM do not consume excessive processing resources.

How do I collect logs from isolated JavaScript code execution?

You collect logs from isolated JavaScript code execution by applying the execution tools that capture logs during the process. The sandboxed VM runs the provided input code and directly returns the generated logs alongside the execution result.