> For the complete documentation index, see [llms.txt](https://docs.radar.citadel-ai.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.radar.citadel-ai.com/en/application-owner-guide/new-application.md).

# Register a New Application

{% hint style="info" %}
This guide walks you through registering a monitored application to an existing Node.

Please note that Nodes are provided according to your contract and cannot be added on your own. If you would like to request additional Nodes, please reach out to <support@citadel-ai.com>.
{% endhint %}

To register an application, click `Nodes` in the sidebar menu to navigate to the Nodes page.

From the Nodes screen, select the target Node where you want to register the application, then select `Add application`.

{% hint style="info" %}
Nodes serve as units for isolating processing infrastructure. We recommend configuring Nodes according to how you need to separate your infrastructure operationally—for instance, isolating Production/Staging environments or segmenting by department.
{% endhint %}

<figure><img src="/files/S4KkdPBnQA2l7TUZVtG9" alt=""><figcaption></figcaption></figure>

Selecting `Add application` opens a window. Enter the application name and description.

<figure><img src="/files/573MvQDAtTw0OTnmqDFq" alt="" width="350"><figcaption></figcaption></figure>

### Application settings

To start applying guardrails and monitoring, proceed with the following settings.

{% stepper %}
{% step %}

### Issue an API key

You can issue an API Key for calling the Radar API from the application.

For details, see [Issue and Manage API Keys](/en/developer-guide/api-keys.md).
{% endstep %}

{% step %}

### Configure metrics to apply to the application

Apply metrics to the target application and configure the evaluation criteria used for guardrails and monitoring.

For details, see [Configure Evaluation Metrics for an Application](/en/application-owner-guide/new-application/set-metrics.md).
{% endstep %}

{% step %}

### Configure alerts

Configure alert rules based on various conditions.

For details, see [Configure Alerts](/en/application-owner-guide/new-application/set-alerts.md).
{% endstep %}

{% step %}

### Manage application resource permissions

Configure per-user viewing and editing permissions for the target application.

For details, see [Manage Permissions](/en/administrator-guide/manage-permissions.md).
{% endstep %}
{% endstepper %}