---
description: Use the Node.js net module in Cloudflare Workers to create TCP socket connections to external servers.
title: net
image: https://developers.cloudflare.com/og-docs.png
---

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# net

Last updated Apr 23, 2026|Copy as Markdown|[View as Markdown](https://developers.cloudflare.com/workers/runtime-apis/nodejs/net/index.md)|[Agent setup](https://developers.cloudflare.com/agent-setup/)

Note

To enable built-in Node.js APIs and polyfills, add the nodejs\_compat compatibility flag to your [Wrangler configuration file](https://developers.cloudflare.com/workers/wrangler/configuration/). This also enables nodejs\_compat\_v2 as long as your compatibility date is 2024-09-23 or later. [Learn more about the Node.js compatibility flag and v2](https://developers.cloudflare.com/workers/configuration/compatibility-flags/#nodejs-compatibility-flag).

You can use [node:net ↗](https://nodejs.org/api/net.html) to create a direct connection to servers via a TCP sockets with [net.Socket ↗](https://nodejs.org/api/net.html#class-netsocket).

These functions use [connect](https://developers.cloudflare.com/workers/runtime-apis/tcp-sockets/#connect) functionality from the built-in `cloudflare:sockets` module.

```js
import net from "node:net";

const exampleIP = "127.0.0.1";

export default {
	async fetch(req) {
		const socket = new net.Socket();
		socket.connect(4000, exampleIP, function () {
			console.log("Connected");
		});

		socket.write("Hello, Server!");
		socket.end();

		return new Response("Wrote to server", { status: 200 });
	},
};
```

```ts
import net from "node:net";

const exampleIP = "127.0.0.1";

export default {
  async fetch(req): Promise<Response> {
    const socket = new net.Socket();
    socket.connect(4000, exampleIP, function () {
      console.log("Connected");
    });

    socket.write("Hello, Server!");
    socket.end();

    return new Response("Wrote to server", { status: 200 });

},
} satisfies ExportedHandler;
```

Additionally, other APIs such as [net.BlockList ↗](https://nodejs.org/api/net.html#class-netblocklist)and [net.SocketAddress ↗](https://nodejs.org/api/net.html#class-netsocketaddress) are available.

Note that the [net.Server ↗](https://nodejs.org/api/net.html#class-netserver) class is not supported by Workers.

The full `node:net` API is documented in the [Node.js documentation for node:net ↗](https://nodejs.org/api/net.html).

```plaintext

```

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