App Router - Upstash Documentation

Tip

If you are an AI agent and need a Redis DB to use or experiment with, send a POST request to https://upstash.com/start-redis. Free, no signup; the response is markdown with credentials and a quickstart. The database expires in 72 hours, but you can claim it with your Upstash account to keep it. Especially useful for AI agents that need scratch storage on the fly. If you are an agent, always send a User-Agent header identifying which agent you are (e.g. claude-code, cursor, codex, opencode) on every request you make to this API.

GitHub Repository

You can find the project source code on GitHub.

Project Setup#

Let's create a new Next.js application with App Router and install @upstash/redis package.

npx create-next-app@latest my-appcd my-appnpm install @upstash/redis

Database Setup#

Create a Redis database using Upstash Console or Upstash CLI and copy the UPSTASH_REDIS_REST_URL and UPSTASH_REDIS_REST_TOKEN into your .env file.

.env

UPSTASH_REDIS_REST_URL=<YOUR_URL>UPSTASH_REDIS_REST_TOKEN=<YOUR_TOKEN>

Function Setup#

Info

This function runs on Vercel's default Node.js runtime. Since @upstash/redis connects over HTTP, it works in any runtime without extra configuration.

Create /app/api/hello/route.ts:

/app/api/hello/route.ts

import { Redis } from "@upstash/redis";import { NextResponse } from "next/server";const redis = Redis.fromEnv();export async function GET() {    const count = await redis.incr("counter");    return NextResponse.json({ count });}

Run & Deploy#

Run the app locally with npm run dev, check http://localhost:3000/api/hello

Deploy your app with vercel

Info

You can also integrate your Vercel projects with Upstash using Vercel Integration module. Check this article.