---
title: "Cannot access request data in `use cache`"
url: "https://nextjs.org/docs/messages/next-request-in-use-cache"
docs_index: /docs/llms.txt
---



## Why This Error Occurred

A cached function tried to access the incoming request. APIs such as `cookies()`, `headers()`, `searchParams`, and `connection()` depend on the request and cannot be called inside a function that uses the `use cache` directive. This error can also occur when you pass unresolved request data into a cached function during prerendering. You can read draft mode inside a cached function, but enable or disable it outside.

A cached function can also stall if it awaits a promise stored outside the function, such as one kept in a module-scoped `Map` for deduplication.

## Possible Ways to Fix It

Read and resolve request data outside the cached function, then pass only the values you need as arguments. Call `connection()` and enable or disable draft mode outside the cached function as well.

If a module-scoped cache or deduplication layer stores promises, remove it. The `use cache` directive already deduplicates calls with the same arguments within a render pass and across requests for as long as the cache entry lasts.

Before:

```jsx filename="app/page.js" highlight={5}
import { cookies } from 'next/headers'

async function getGreeting() {
  'use cache'
  const isLoggedIn = (await cookies()).has('token')
  return isLoggedIn ? 'Welcome back' : 'Welcome'
}

export default async function Page() {
  const greeting = await getGreeting()
  return <p>{greeting}</p>
}
```

After:

```jsx filename="app/page.js" highlight={9,10}
import { cookies } from 'next/headers'

async function getGreeting(isLoggedIn) {
  'use cache'
  return isLoggedIn ? 'Welcome back' : 'Welcome'
}

export default async function Page() {
  const isLoggedIn = (await cookies()).has('token')
  const greeting = await getGreeting(isLoggedIn)
  return <p>{greeting}</p>
}
```

## Useful Links

- [`headers()` function](/docs/app/api-reference/functions/headers)
- [`cookies()` function](/docs/app/api-reference/functions/cookies)
- [`connection()` function](/docs/app/api-reference/functions/connection)
- [`draftMode()` function](/docs/app/api-reference/functions/draft-mode)
- [`use cache` directive](/docs/app/api-reference/directives/use-cache)