Scaling CPA Campaigns with Server-to-Server Postback Tracking

In performance marketing, accurate conversion tracking is the difference between a profitable campaign and a loss. For years, media buyers relied on browser cookies and pixels. However, with privacy changes like Apple's App Tracking Transparency and browser cookie blocks, traditional pixel tracking has become unreliable.

Why Server-to-Server (S2S) Beats Pixels

Unlike cookie tracking, S2S tracking communicates conversions directly between the advertiser's server and the ad network's server. When a conversion occurs (like a purchase or a download), the advertiser triggers a postback call using a unique click ID generated at the start of the click session. Since this exchange happens server-side, it is bypass-proof, ensuring absolute accuracy and preventing tracking loss.

Implementing S2S Postbacks

To implement postbacks, you must pass the ad network's unique click identifier (often referred to as click_id or transaction_id) through your tracking URLs. Upon successful conversion, your server triggers a GET or POST request to the network's postback URL, passing back that identifier. In AffiliateHunk, S2S postback interfaces are integrated into our publisher portals, allowing advertisers to sync campaigns in under 100 milliseconds.