Quickstart - Upstash Documentation

Upstash Realtime is the easiest way to add realtime features to any Next.js project.

Why Upstash Realtime?#

🧨 Clean APIs & first-class TypeScript support
⚡ Extremely fast, zero dependencies, 2.6kB gzipped
💻 Deploy anywhere: Vercel, Netlify, etc.
💎 100% type-safe with zod 4 or zod mini
⏱️ Built-in message histories
🔌 Automatic connection management w/ delivery guarantee
🔋 Built-in middleware and authentication helpers
📶 100% HTTP-based: Redis streams & SSE

Quickstart#

1. Installation#

npm install @upstash/realtime @upstash/redis zod

2. Configure Upstash Redis#

Upstash Realtime is powered by Redis Streams. Grab your credentials from the Upstash Console.

Redis database details in the Upstash Console

Add them to your environment variables:

.env

UPSTASH_REDIS_REST_URL=https://striking-osprey-20681.upstash.ioUPSTASH_REDIS_REST_TOKEN=AVDJAAIjcDEyZ...

And lastly, create a Redis instance:

lib/redis.ts

import { Redis } from "@upstash/redis"export const redis = new Redis({  url: process.env.UPSTASH_REDIS_REST_URL,  token: process.env.UPSTASH_REDIS_REST_TOKEN,})

3. Define Event Schema#

Define the structure of realtime events in your app:

lib/realtime.ts

import { Realtime, InferRealtimeEvents } from "@upstash/realtime"import { redis } from "./redis"import z from "zod/v4"const schema = {  notification: {    alert: z.string(),  },}export const realtime = new Realtime({ schema, redis })export type RealtimeEvents = InferRealtimeEvents<typeof realtime>

4. Create Realtime Route Handler#

Create a route handler at api/realtime/route.ts:

app/api/realtime/route.ts

import { handle } from "@upstash/realtime"import { realtime } from "@/lib/realtime"export const GET = handle({ realtime })

5. Add the Provider#

Wrap your application in RealtimeProvider:

app/providers.tsx

"use client"import { RealtimeProvider } from "@upstash/realtime/client"export function Providers({ children }: { children: React.ReactNode }) {  return <RealtimeProvider>{children}</RealtimeProvider>}

app/layout.tsx

import { Providers } from "./providers"export default function RootLayout({ children }: { children: React.ReactNode }) {  return (    <html>      <body>        <Providers>{children}</Providers>      </body>    </html>  )}

6. Create Typed Client Hook#

Create a typed useRealtime hook for your client components:

lib/realtime-client.ts

"use client"import { createRealtime } from "@upstash/realtime/client"import type { RealtimeEvents } from "./realtime"export const { useRealtime } = createRealtime<RealtimeEvents>()

7. Emit Events#

From any server component, server action, or API route:

app/api/notify/route.ts

import { realtime } from "@/lib/realtime"export const POST = async () => {  await realtime.emit("notification.alert", "hello world!")  return new Response("OK")}

In any client component:

app/components/notifications.tsx

"use client"import { useRealtime } from "@/lib/realtime-client"export default function Notifications() {  useRealtime({    events: ["notification.alert"],    onData({ event, data, channel }) {      console.log(`Received ${event}:`, data)    },  })  return <p>Listening for events...</p>}