# useResponseHeader

> Use useResponseHeader to set a server response header.

<important>

This composable is available in Nuxt v3.14+.

</important>

You can use the built-in [`useResponseHeader`](/docs/4.x/api/composables/use-response-header) composable to set any server response header within your pages, components, and plugins.

```ts
// Set a custom response header
const header = useResponseHeader('X-My-Header')
header.value = 'my-value'
```

## Example

We can use `useResponseHeader` to easily set a response header on a per-page basis.

```vue [app/pages/test.vue]
<script setup>
// pages/test.vue
const header = useResponseHeader('X-My-Header')
header.value = 'my-value'
</script>

<template>
  <h1>Test page with custom header</h1>
  <p>The response from the server for this "/test" page will have a custom "X-My-Header" header.</p>
</template>
```

We can use `useResponseHeader` for example in Nuxt [middleware](/docs/4.x/directory-structure/app/middleware) to set a response header for all pages.

```ts [app/middleware/my-header-middleware.ts]
export default defineNuxtRouteMiddleware((to, from) => {
  const header = useResponseHeader('X-My-Always-Header')
  header.value = `I'm Always here!`
})
```