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Sandbox SDK (Beta)

Build secure, isolated code execution environments

Available on Workers Paid plan

The Sandbox SDK enables you to run untrusted code securely in isolated environments. Built on Containers, Sandbox SDK provides a simple API for executing commands, managing files, running background processes, and exposing services — all from your Workers applications.

Sandboxes are ideal for building AI agents that need to execute code, interactive development environments, data analysis platforms, CI/CD systems, and any application that needs secure code execution at the edge. Each sandbox runs in its own isolated container with a full Linux environment, providing strong security boundaries while maintaining performance.

With Sandbox, you can execute Python scripts, run Node.js applications, analyze data, compile code, and perform complex computations — all with a simple TypeScript API and no infrastructure to manage.

TypeScript
import { getSandbox } from '@cloudflare/sandbox';


export { Sandbox } from '@cloudflare/sandbox';


export default {
  async fetch(request: Request, env: Env): Promise<Response> {
    const sandbox = getSandbox(env.Sandbox, 'user-123');


    // Execute a command and get the result
    const result = await sandbox.exec('python --version');


    return Response.