create-next-sfx-app/src/pages/api/hello.ts

Next.js Typescript Starter enhanced with Eslint, Prettier, RTL

// Next.js API route support: https://nextjs.org/docs/api-routes/introduction
import type { NextApiRequest, NextApiResponse } from 'next';

type Data = {
	name: string;
};

export default function handler(
	req: NextApiRequest,
	res: NextApiResponse<Data>
) {
	res.status(200).json({ name: 'John Doe' });
}