Serverless Functions Quickstart

In this quickstart guide, you'll learn how to get started with Serverless Functions on Vercel using Vercel CLI. The guide will cover:

• Creating a Serverless Function
• Deploying a Serverless Function with Vercel CLI

1. You should have the latest version of Vercel CLI installed. To check your version, use vercel --version. To install or update Vercel CLI, use:

   pnpm

   yarn

   npm

   pnpm i -g vercel@latest

2. You should have an existing project. If you don't have one, you can run the following terminal command to create a Next project:

   terminal

   npx create-next-app@latest --typescript

Select your preferred framework to get started. The implementation of the Serverless Function will differ depending on the framework you choose.

import { NextResponse } from 'next/server';
import type { NextRequest } from 'next/server';
export function GET(request: NextRequest) {
  return NextResponse.json(
    {
      body: request.body,
      path: request.nextUrl.pathname,
      query: request.nextUrl.search,
      cookies: request.cookies.getAll(),
    },
    {
      status: 200,
    },
  );
}

next dev

{
  body: null,
  path: "/api/serverless-example",
  query: "?query=123",
  cookies: [
    ...
  ],
};