assistant-ui Cloud

Always consult assistant-ui.com/llms.txt for the latest API.

Cloud persistence for threads, messages, and files.

References

• ./references/persistence.md -- Thread and message persistence
• ./references/authorization.md -- Authentication patterns
• ./references/custom-persistence.md -- Self-hosted message persistence
• ./references/auth-integrations.md -- better-auth and Clerk integrations

Installation

npm install assistant-cloud

Quick Start

import { AssistantCloud } from "assistant-cloud";
import { useChatRuntime, AssistantChatTransport } from "@assistant-ui/react-ai-sdk";
import { AssistantRuntimeProvider } from "@assistant-ui/react";
import { Thread } from "@/components/assistant-ui/thread";
import { ThreadList } from "@/components/assistant-ui/thread-list";

const cloud = new AssistantCloud({
  baseUrl: process.env.NEXT_PUBLIC_ASSISTANT_BASE_URL,
  authToken: async () => getAuthToken(),
});

function Chat() {
  const runtime = useChatRuntime({
    transport: new AssistantChatTransport({ api: "/api/chat" }),
    cloud,
  });

  return (
    <AssistantRuntimeProvider runtime={runtime}>
      <ThreadList />
      <Thread />
    </AssistantRuntimeProvider>
  );
}

Authentication Options

// JWT Token (recommended)
const cloud = new AssistantCloud({
  baseUrl: process.env.NEXT_PUBLIC_ASSISTANT_BASE_URL,
  authToken: async () => session?.accessToken,
});

// API Key (server-side)
const cloud = new AssistantCloud({
  baseUrl: process.env.ASSISTANT_BASE_URL,
  apiKey: process.env.ASSISTANT_API_KEY,
  userId: user.id,
  workspaceId: user.workspaceId,
});

// Anonymous (public apps)
const cloud = new AssistantCloud({
  baseUrl: process.env.NEXT_PUBLIC_ASSISTANT_BASE_URL,
  anonymous: true,
});

Cloud API

const { threads } = await cloud.threads.list();
const { thread_id } = await cloud.threads.create({
  title: "New Chat",
  last_message_at: new Date(), // required
});
await cloud.threads.update(threadId, { title: "Updated" });
await cloud.threads.delete(threadId);

// messages is a property on threads; every method takes threadId as its first argument
const { messages } = await cloud.threads.messages.list(threadId);

const { signedUrl, publicUrl } = await cloud.files.generatePresignedUploadUrl({
  filename: "document.pdf",
});
await fetch(signedUrl, { method: "PUT", body: file });

Environment Variables

NEXT_PUBLIC_ASSISTANT_BASE_URL=https://api.assistant-ui.com
ASSISTANT_API_KEY=your-api-key  # Server-side only

Common Gotchas

Threads not persisting

• Pass cloud to runtime
• Check authentication

Auth errors

• Verify authToken returns valid token
• Check baseUrl is correct