next-plugin-preval/examples/example-app/pages/api/hello.ts

> Pre-evaluate async functions (for data fetches) at build time and import them like JSON

import { NextApiHandler } from 'next';
import exampleData from '@/utils/example.preval';

const handler: NextApiHandler = (_req, res) => {
  res.status(200).json(exampleData);
};

export default handler;