> For the complete documentation index, see [llms.txt](https://clients.medianova.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://clients.medianova.com/products/performance-cdn/static-content-delivery/advanced-configuration/headers/x-cdn-header.md).

# X-CDN Header

Learn how the X-CDN Header adds CDN-specific information to origin requests in the Medianova Control Panel.

**X-CDN Header** adds a generated token to requests sent from the CDN to your origin. Your origin can use this value to distinguish CDN-proxied requests from requests that reach the origin directly.

You can configure X-CDN Header in the [Medianova Control Panel](https://cloud.medianova.com) or via the [API](https://clients.medianova.com/api-documentation/performance-cdn/headers#put-api-v1-cdn-organization_uuid-resource-resource_uuid-2).

## Configure X-CDN Header

{% stepper %}
{% step %}

### Open X-CDN Header

Open your CDN Resource and select **Headers**.

Locate the **X-CDN Header** section.
{% endstep %}

{% step %}

### Enable X-CDN Header

Enable **X-CDN Header**.
{% endstep %}

{% step %}

### Generate a Token

Click **Generate** next to **Token**.

The generated token is used in the `X-CDN` header added to requests sent from the CDN to your origin.

{% hint style="info" %}
Configure your origin to validate the generated token if you want to use the X-CDN Header to verify that a request was forwarded through Medianova CDN.
{% endhint %}
{% endstep %}

{% step %}

### Save the Configuration

Click **Save** in the pending changes bar.

Review the pending changes and confirm the update.
{% endstep %}
{% endstepper %}

## How X-CDN Header Works

When X-CDN Header is enabled, the CDN adds the `X-CDN` header to requests forwarded to your origin.

Your origin can inspect the header and its token to identify requests forwarded through Medianova CDN.

{% hint style="warning" %}
The presence of the `X-CDN` header alone should not be treated as verification. Validate the header value against the configured token when using it for origin-side access control or request verification.
{% endhint %}


---

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