# Active Proxy With Content

With the active proxy and the web application server used in combination, in this scenario the <code class="expression">space.vars.X\_Agent\_Name\_Single</code> can be configured to act as a proxy that has the ability to add content.

<figure><img src="https://2423451286-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F42mDa58RoaDxb6t8mbaI%2Fuploads%2Fgit-blob-075e9fbdb62bd30f441e47546a7f716922cd09c3%2Fimage.png?alt=media" alt=""><figcaption><p>Graph</p></figcaption></figure>

Use cases include:

* Customisation of the user experience of a SaaS application, without the knowledge of the SaaS provider
* Mobile enablement of an existing application without any changes
* Adding two-factor authentication to an existing insecure application
* Short lived campaigns and surveys that would otherwise clutter the target application code