> ## Documentation Index
> Fetch the complete documentation index at: https://docs.subtrace.dev/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Cloudflare Workers

> Use Subtrace to see HTTP requests in your Cloudflare Workers

Here's a quick guide to setting up Subtrace in your Cloudflare Workers.

First, add `@subtrace/cloudflare` to your Worker `package.json`:

```bash icon="terminal" theme={null}
npm install @subtrace/cloudflare
```

Wrap your Worker's `fetch` handler to use the Subtrace middleware:

```js src/index.js icon="javascript" highlight={1,4,6} theme={null}
import { subtrace } from "@subtrace/cloudflare";

export default {
  fetch: subtrace(async (request, env, ctx) => {
    return new Response("Hello World!");
  }),
};
```

Set a `SUBTRACE_TOKEN` environment variable in your [Wrangler config file](https://developers.cloudflare.com/workers/wrangler/configuration/):

<CodeGroup dropdown>
  ```json wrangler.jsonc highlight={6-7} theme={null}
  {
    "name": "my-worker",
    "main": "src/index.js",
    "compatibility_date": "2025-09-27",
    "vars": {
      // Go to https://subtrace.dev/dashboard to generate a token
      "SUBTRACE_TOKEN": "subt_..."
    }
  }
  ```

  ```toml wrangler.toml highlight={6-7} theme={null}
  name = "my-worker"
  main = "src/index.js"
  compatibility_date = "2025-09-27"

  [vars]
  # Go to https://subtrace.dev/dashboard to generate a token
  SUBTRACE_TOKEN = "subt_..."
  ```
</CodeGroup>

Deploy your Cloudflare Worker:

```bash icon="terminal" theme={null}
npx wrangler deploy
```

And that's it, you can now see all inbound and outbound HTTP requests in your Cloudflare Worker via the [Subtrace dashboard](https://subtrace.dev/dashboard)!