Why is server-side conversion tracking through the OpenAI Conversions API necessary instead of relying solely on a website pixel?

Standard browser-based tracking pixels face significant limitations, such as cookie restrictions, ad blockers, and strict browser privacy settings, which can lead to missed conversion data. Additionally, client-side pixels cannot capture post-session conversions like offline approvals, qualified leads, or delayed deposits. Because OpenAI optimizes ad delivery based on visible conversion signals, any untracked conversion directly degrades campaign optimization. Integrating server-to-server tracking via the OpenAI Conversions API ensures that Affise sends verified conversion data directly to OpenAI, independent of the user's browser environment. To learn more about how performance tracking and payouts function holistically, read our complete guide on affiliate management systems .

How does Affise route ad traffic and conversions for ChatGPT Ads without traditional redirect links?

Unlike traditional affiliate networks, OpenAI Ads does not accept redirect tracking links as destination URLs, requiring ads to point directly to your landing page. When a user clicks a ChatGPT ad, OpenAI appends its click identifier directly to the landing page URL using the {oppref} macro. The Affise WebSDK installed on your landing page captures this identifier and stores it within the sub1 parameter. When a user completes a conversion, Affise passes the conversion payload along with the stored sub1 value directly to OpenAI’s conversion endpoint for accurate attribution. If you want to see how businesses leverage these tracking workflows to scale performance, read our client case studies .

What key technical considerations should be reviewed before launching a ChatGPT Ads campaign with Affise?

First, you should keep your existing OpenAI Pixel active alongside the Conversions API because OpenAI automatically deduplicates events arriving from both sources to ensure complete data accuracy. Second, keep in mind that OpenAI only accepts conversion data timestamped within the last 7 days; if your sales cycle or approval process exceeds this window, you will need to configure your postbacks to fire on initial registration rather than delayed approval. Finally, all initial tracking configurations run in validation mode, requiring you to send a real test conversion and confirm receipt in Ads Manager before scaling ad spend. For additional insights on optimizing marketing channels and strategy, visit our performance marketing knowledge hub .