# Server-side integration

In a server-side configuration, the calls are made from the retailer's e-commerce platform server to the **Veasybl** server via an [API](/en/api-integration/reference.md).

<figure><img src="/files/y1XGVRYXTKIZyqnCcWcM" alt=""><figcaption></figcaption></figure>

* The user navigates and requests a product listing page from the retailer's server.
* The retailer's server makes a request to **Veasybl** via the API to retrieve the sponsored ads.
* **Veasybl** returns the sponsored ads to the retailer's server.
* The retailer then merges the sponsored ads with the organic product results.
* The sponsored ads and organic products are sent together to the user's browser.
* Impressions, clicks, and purchases are sent to the **Veasybl** server by the browser via the [JavaScript SDK](/en/setup-guide.md), enabling precise performance tracking.


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