Next.js ships with API routes which provides an easy solution to build your own API.
This example shows how to create an API endpoint with CORS headers, using the cors package.
Deploy the example using Vercel:
Execute create-next-app with npm or Yarn to bootstrap the example:
npx create-next-app --example api-routes-cors api-routes-cors-app
# or
yarn create next-app --example api-routes-cors api-routes-cors-appDeploy it to the cloud with Vercel (Documentation).