> For the complete documentation index, see [llms.txt](https://docs.multiset.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.multiset.ai/web-sdk/webxr-sdk/authentication.md).

# Authentication

Get credentials and authorize the Multiset client before starting a session

### Get Your Credentials

Open the [Multiset Developer Portal](https://developer.multiset.ai) and navigate to the **Credentials** section. Copy your **Client ID** and **Client Secret**.

Your **Map Code** or **Map Set Code** is listed in the Maps section of the portal (format: `MAP_XXXXXXXXXX`).

### Authorize the Client

Create a `MultisetClient` and call `authorize()` before starting an AR session. Authorization exchanges your credentials for a short-lived access token used in all subsequent API calls.

```typescript
import { MultisetClient } from '@multisetai/vps/core';

const client = new MultisetClient({
  clientId: 'YOUR_CLIENT_ID',
  clientSecret: 'YOUR_CLIENT_SECRET',
  mapType: 'map',       // 'map', 'map-set', or 'object-tracking'
  code: 'MAP_XXXXXXXXXX',
});

await client.authorize();
```

For a **MapSet**, change `mapType` to `'map-set'` and pass the map set code:

```typescript
const client = new MultisetClient({
  clientId: 'YOUR_CLIENT_ID',
  clientSecret: 'YOUR_CLIENT_SECRET',
  mapType: 'map-set',
  code: 'MAPSET_XXXXXXXXXX',
});
```

{% hint style="warning" %}
Call `authorize()` once before any localization or tracking request. If the token expires during a long session, call it again to refresh.
{% endhint %}

### CORS Configuration

Localization requests are made directly from the browser to the Multiset API. Your domain must be added to the allowlist or every request will fail with a CORS error.

Follow the steps in [Configuring Allowed Domains (CORS)](/fundamentals/credentials/configuring-allowed-domains-cors.md) before going to production.

{% hint style="info" %}
`localhost` and `127.0.0.1` are allowed by default for development.
{% endhint %}

### Environment Variables

Avoid hardcoding credentials in source code. Use environment variables and load them at build time:

```typescript
const client = new MultisetClient({
  clientId: import.meta.env.VITE_MULTISET_CLIENT_ID,
  clientSecret: import.meta.env.VITE_MULTISET_CLIENT_SECRET,
  mapType: 'map',
  code: import.meta.env.VITE_MAP_CODE,
});
```

{% hint style="warning" %}
Client credentials are visible to anyone who inspects your bundle. For production apps, proxy the `authorize()` call through your own backend and return only the token to the browser.
{% endhint %}


---

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