# useRequestHeader

> Use useRequestHeader to access a certain incoming request header.

You can use the built-in [`useRequestHeader`](/docs/3.x/api/composables/use-request-header) composable to access any incoming request header within your pages, components, and plugins.

```ts
// Get the authorization request header
const authorization = useRequestHeader('authorization')
```

<tip>

In the browser, `useRequestHeader` will return `undefined`.

</tip>

## Example

We can use `useRequestHeader` to easily figure out if a user is authorized or not.

The example below reads the `authorization` request header to find out if a person can access a restricted resource.

```ts [middleware/authorized-only.ts]
export default defineNuxtRouteMiddleware((to, from) => {
  if (!useRequestHeader('authorization')) {
    return navigateTo('/not-authorized')
  }
})
```