Next.js 13 how to Access an External API from an API Route using App Router api route?

I have this code that supposedly accesses an external API using the Next.js SDK.

// app/api/test/route.ts (Typescript)
import { NextResponse } from 'next/server'
import { getAccessToken, withApiAuthRequired } from '@auth0/nextjs-auth0'

export const GET = withApiAuthRequired(async () => {
  // If your access token is expired and you have a refresh token
  // `getAccessToken` will fetch you a new one using the `refresh_token` grant
  const { accessToken } = await getAccessToken()
  const response = await fetch('', {
    headers: {
      Authorization: `Bearer ${accessToken}`,
  const data = await response.text()
  return NextResponse.json({ data })

The problem is, it doesn’t refresh the access token and rotate the refresh token. It is always trying to refresh with the expired token. I think it works exactly once, then from second time I get the error (in server):

- error AccessTokenError: The request to refresh the access token failed. CAUSE: invalid_grant (Unknown or invalid refresh token.)
    at NodeClient.refresh (webpack-internal:///(rsc)/./node_modules/@auth0/nextjs-auth0/dist/auth0-session/client/node-client.js:158:19)

The only way to refresh the access token is to logout and log in again, which is obvouisly not ideal and totally defeats the purpose of refresh tokens.

There is no example to guide how to get rotating refresh tokens to work correctly in a Next.js 13 project using app router.

I am already using “Regular Web Application” for this. I have set the correct audience and scope correctly in environment, including offline_access. I’m lost how to solve this. Is using “reusable refresh token” the only way? There’s no way to use the rotating one?

PS: It works correctly in Postman when directly accessing after setting up the OAuth 2.0 to authenticate with Auth0. So the problem is unlikely to be on my backend.