---
title: Dynamic Workers Starter
description: A starter template for deploying a Worker that loads and runs Dynamic Workers.
image: https://developers.cloudflare.com/dev-products-preview.png
---

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# Dynamic Workers Starter

A [starter template ↗](https://github.com/cloudflare/agents/tree/main/examples/dynamic-workers) for deploying a Worker that loads and runs [Dynamic Workers](https://developers.cloudflare.com/dynamic-workers/).

[![Deploy to Workers](https://deploy.workers.cloudflare.com/button)](https://deploy.workers.cloudflare.com/?url=https://github.com/cloudflare/agents/tree/main/examples/dynamic-workers)

## What it does

This template demonstrates how to use the [Worker Loader API](https://developers.cloudflare.com/workers/runtime-apis/bindings/worker-loader/) to execute code at runtime. The host Worker exposes an `/api/run` endpoint that accepts code from the frontend, loads it into a sandboxed Dynamic Worker, and returns the result.

Use this pattern for AI agents that need to execute a snippet of code to complete an action.

## Configuration

Add a `worker_loaders` binding to your Wrangler file:

* [  wrangler.jsonc ](#tab-panel-8774)
* [  wrangler.toml ](#tab-panel-8775)

JSONC

```
{  "worker_loaders": [    {      "binding": "LOADER"    }  ]}
```

TOML

```
[[worker_loaders]]binding = "LOADER"
```

## Loading and executing a Dynamic Worker

In this example:

* `env.LOADER.load()` creates a one-off dynamic isolate
* `globalOutbound: null` blocks all outbound network access from the Dynamic Worker

* [  JavaScript ](#tab-panel-8776)
* [  TypeScript ](#tab-panel-8777)

JavaScript

```
export default {  async fetch(request, env) {    const { code } = await request.json();
    const worker = env.LOADER.load({      compatibilityDate: "2026-05-01",      mainModule: "worker.js",      modules: {        "worker.js": code,      },      // Block all outbound network access      globalOutbound: null,    });
    const result = await worker.getEntrypoint().fetch(request);    return result;  },};
```

TypeScript

```
export default {  async fetch(request, env): Promise<Response> {    const { code } = await request.json();
    const worker = env.LOADER.load({      compatibilityDate: "2026-05-01",      mainModule: "worker.js",      modules: {        "worker.js": code,      },      // Block all outbound network access      globalOutbound: null,    });
    const result = await worker.getEntrypoint().fetch(request);    return result;  },} satisfies ExportedHandler;
```

## Running locally

Terminal window

```
npm installnpm run dev
```

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