# Web Application Platform Configuration

{% hint style="info" %}
The Web Application platform is currently only available to Enterprise customers. To receive access, contact your Account Manager.
{% endhint %}

The Web Application platform is a way to deploy PixieBrix mods anywhere a web application can run, as a standalone web page or as an embedded frame (iframe)

## Custom Domain Name

See section "Custom Domain and White-Labelling" under [Custom Branding and Themes](/enterprise-it-setup/custom-branding-and-themes.md)

## Third-Party API Configuration

### Cross-origin resource sharing (CORS)

API requests made  from the browser to third-party APIs originate from `app.pixiebrix.com` or your custom domain name. If your API has cross-origin resource sharing (CORS) controls configured, you must allowlist `app.pixiebrix.com` or your [#custom-domain-name](#custom-domain-name "mention")

* [Access-Control-Allow-Origin Header](https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Access-Control-Allow-Origin)

### OAuth2 Redirect URL

To support OAuth2 integrations, you must add web application platform's URL to the URL redirect allowlist of your OAuth2 provider:

```
https://app.pixiebrix.com/oauth2-callback/
```

If you are using a [#custom-domain-name](#custom-domain-name "mention"), use your custom domain in the redirect URL:

```
https://<your-custom-domain>/oauth2-callback/
```


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