# useRequestHeader
> Use useRequestHeader to access a certain incoming request header.
You can use the built-in [`useRequestHeader`](/docs/4.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')
```
In the browser, `useRequestHeader` will return `undefined`.
## 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 [app/middleware/authorized-only.ts]
export default defineNuxtRouteMiddleware((to, from) => {
if (!useRequestHeader('authorization')) {
return navigateTo('/not-authorized')
}
})
```
---
- [Source](https://github.com/nuxt/nuxt/blob/main/packages/nuxt/src/app/composables/ssr.ts)