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Realtime AI chat with AI Elements
This example shows how to build a realtime, multiplayer AI chat with Liveblocks Feeds, Next.js, and AI Elements.
Each chat is a feed inside a Liveblocks room, so messages sync instantly to
everyone connected, complete with shared presence (avatar stack and a live "AI
is thinking…" status). The AI reply is generated on the server and streamed back
into the feed with @liveblocks/node (createFeedMessage + updateFeedMessage),
then rendered live for all users through the useFeedMessages hook — including
reasoning, chain of thought, tool calls, sources, and token usage via AI
Elements.
Getting started
Run the following command to try this example locally:
This will download the example and ask permission to open your browser, enabling you to automatically get your API key from your liveblocks.io account.
Manual setup
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Alternatively, you can set up your project manually:
- Install all dependencies with
npm install - Create an account on liveblocks.io
- Copy your secret key from the dashboard
- Create an
.env.localfile and add your secret key as theLIVEBLOCKS_SECRET_KEYenvironment variable - (Optional) Add an
AI_GATEWAY_API_KEYfrom the Vercel AI Gateway to get real model responses. Without it, the example uses a built-in mock assistant so it still runs end to end. - Run
npm run devand go to http://localhost:3000
To see the realtime sync, open the page in two browser tabs and send a message from one — it appears instantly in both, along with the AI's reply.
Deploy on Vercel
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To both deploy on Vercel, and run the example locally, use the following command:
This will download the example and ask permission to open your browser, enabling you to deploy to Vercel.
Develop on CodeSandbox
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After forking
this example
on CodeSandbox, create the LIVEBLOCKS_SECRET_KEY environment variable as a
secret.
