> ## Documentation Index
> Fetch the complete documentation index at: https://developers.particle.network/llms.txt
> Use this file to discover all available pages before exploring further.

# Registering a UniversalX Account

> Register a Universal Account on UniversalX, the chain-abstracted trading platform built on Universal Accounts.

The **Universal Accounts SDK** also allows you to register an account on [UniversalX](https://universalx.app), a chain-abstracted trading platform built upon **Universal Accounts**.

This can automatically onboard your users into **UniversalX** when they create or initialize a Universal Account. UniversalX registration is optional and only needs to be done **once per UA**.

```ts theme={null}
import { UniversalAccount, createUnsignedMessage } from "@particle-network/universal-account-sdk";
import { randomUUID } from "crypto";

const ua = new UniversalAccount({
  projectId: process.env.NEXT_PUBLIC_PROJECT_ID!,
  projectClientKey: process.env.NEXT_PUBLIC_CLIENT_KEY!,
  projectAppUuid: process.env.NEXT_PUBLIC_APP_ID!,
  ownerAddress: 'USER_ADDRESS',
});

// Fetch smart account info to get the UA address
const smartAccountOptions = await ua.getSmartAccountOptions();

// Optional invite code
const inviteCode = "000000";

// Prepare registration payload
const deviceId = randomUUID();
const timestamp = Date.now();

const unsignedMessage = createUnsignedMessage(
  smartAccountOptions.smartAccountAddress!,
  deviceId,
  timestamp
);

// Sign message using EOA (can be a backend wallet)
const signature = provider.signMessage(unsignedMessage);

// Register the UniversalX account
const result = await ua.register(inviteCode, deviceId, timestamp, signature);

if (!!result.token) {
  console.log("Registration successful.");
} else {
  console.error("Registration failed:", result);
}
```

<Info>
  You can also pass an invite code (`"000000"` by default) if you have one.
</Info>

## Next steps

<CardGroup cols="2">
  <Card title="Backend / Server-side Usage" icon="server" href="/universal-accounts/ua-reference/web/backend">
    Construct UA registrations from a Node.js backend.
  </Card>

  <Card title="Initialization & Configuration" icon="gear" href="/universal-accounts/ua-reference/web/initialization">
    Configure project credentials and account mode.
  </Card>
</CardGroup>