net

Last updated Apr 23, 2026 Note

For compatibility dates of 2026-08-04 or later, Workers enables both nodejs_compat and nodejs_compat_v2 by default. These flags are not used for these compatibility dates. Existing projects do not need to remove them when updating their compatibility date. For earlier dates, add nodejs_compat to your Wrangler configuration file to opt in. For instructions to turn off Node.js compatibility, refer to the Node.js compatibility flag.

You can use node:net ↗︎ to create a direct connection to servers via a TCP sockets with net.Socket ↗︎.

These functions use connect functionality from the built-in cloudflare:sockets module.

index.jsjs

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 });
    },
};

index.tsts

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 ↗︎ and net.SocketAddress ↗︎ are available.

Note that the net.Server ↗︎ class is not supported by Workers.

The full node:net API is documented in the Node.js documentation for node:net ↗︎.

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description: Use the Node.js path module in Cloudflare Workers for file and directory path manipulation utilities. title: path image: https://developers.cloudflare.com/workers/runtime-apis/nodejs/path/og.png?v=f490ad333e09357b

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