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sandbox-sdk

officialinfrastructure

Build sandboxed applications for secure code execution on Cloudflare Workers using the Sandbox SDK.

CloudflareCloudflare
View all Cloudflare skills →

Setup & Installation

npx skills add https://github.com/cloudflare/skills --skill sandbox-sdk
or paste the link and ask your coding assistant to install it
https://github.com/cloudflare/skills/tree/main/skills/sandbox-sdk
View on GitHub

What This Skill Does

The Cloudflare Sandbox SDK builds secure, isolated code execution environments on Workers. Covers sandbox lifecycle, running commands, file operations, a code interpreter, and preview URLs — useful for AI code execution, code interpreters, CI/CD systems, interactive dev environments, and running untrusted code.

Isolating untrusted code usually requires standing up VMs or containers — the Sandbox SDK provides a lightweight, Workers-native isolation primitive with lifecycle, files, commands, and previews built in.

When to use it

  • Running untrusted user-submitted code from an AI code interpreter
  • Building a web-based coding playground with isolated execution
  • Executing CI/CD test steps in an isolated sandbox per run
  • Spinning up interactive dev environments with preview URLs
  • Running tool-call code for an agent without exposing the host Worker

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