Quick Answer: WeltPixel released the OpenAI Ads Conversions API Addon for Magento 2 on August 3, 2026. It sends purchases and five other ecommerce events from your Magento server directly to OpenAI's Conversions API, so ad campaigns that run inside ChatGPT report real conversions. It requires the Google Analytics 4 PRO extension version 1.17.3 or higher, and it is included in the Marketing Suite PRO bundle at no extra cost. OpenAI Ads itself is early access, currently available to advertisers in a limited set of countries.
OpenAI opened an advertising platform inside ChatGPT, and merchants are already running campaigns there. The measurement question came fast: how do you know which orders came from those ads? Browser pixels answer it partially at best, because ad blockers and tracking prevention strip them out. Our answer is the same one we built for Meta, TikTok, Reddit and the rest of the ad platforms: send the conversions from the server.
What the addon does
The OpenAI Ads Conversions API Addon connects your Magento 2 store to OpenAI's Conversions API through a server-to-server integration. Once configured, your store reports six events without depending on the visitor's browser:
- PageView
- ViewContent
- AddToCart
- InitiateCheckout
- Purchase
- Signup
You pick which events to send in the Magento admin. The addon pairs with the client-side OpenAI Ads pixel that ships in GA4 PRO 1.17.3, and both copies of an event share the same event ID, so OpenAI deduplicates them into a single conversion. You get the coverage of server-side delivery and the session context of the browser pixel without double counting.
Why server-side matters here
A meaningful share of browser pixel calls never fire. Ad blockers, Intelligent Tracking Prevention, and privacy extensions all take their cut, and the loss lands directly on your reported ROAS. Server-side delivery is not affected by any of that: the order exists on your server, so the event reaches OpenAI.
On a brand-new ad surface this matters twice over. Campaign budgets inside ChatGPT are experiments right now, and experiments live or die on measurement. If a third of your conversions never reach the platform, the experiment reads as a failure it may not be.
Setup in a few minutes
The configuration lives at Stores → Configuration → WeltPixel → OpenAI Ads Pixel Tracking. You need two values from your OpenAI Ads account: the Pixel ID (shared with the client-side snippet) and a Conversions API Key. The key is sent as an Authorization header on every request and never reaches the browser.
The addon also ships the developer tooling the other WeltPixel server-side addons have: a Test Mode that validates payloads against the OpenAI API without recording conversions, file logging to var/log/openai-api.log, an in-admin Log Viewer, customer-group filtering, and support for sending to multiple Pixel ID and API key pairs.
Full setup details are in the user guide.
Also in this release: GA4 and Suite PRO 1.17.3
The addon arrives alongside version 1.17.3 of Google Analytics 4 (both editions) and the Marketing Suite PRO:
- OpenAI Ads pixel in GA4 PRO. The client-side half of the integration: configure the OpenAI Ads pixel directly in the extension, with the same event selection and product identifier options as the other pixel integrations.
- Full Page Cache fix. We removed an unused HTTP context plugin that could trigger a PHP session start on anonymous cache hits, which attached a session cookie to responses that should stay fully cacheable. Stores with heavy anonymous traffic should see better cache efficiency after updating.
Suite PRO customers get the OpenAI Ads addon as part of the bundle. Update to 1.17.3 and the module is available with no separate purchase.
Pricing and availability
The addon follows the standard WeltPixel addon ladder: €199 for Magento Open Source, €399 for Commerce, €599 for Commerce Cloud, each with 12 months of support included and a 30-day refund window. It is available now on the product page.
With this release, all eleven ad and analytics integrations in GA4 PRO have server-side delivery. None of them are pixel-only.
FAQ
Does this require the GA4 PRO extension? Yes. The addon requires Google Analytics 4 PRO version 1.17.3 or higher, where the client-side OpenAI Ads pixel is configured. It extends that setup with server-side delivery.
I own the Marketing Suite PRO. Do I need to buy this? No. The addon is included in Suite PRO as of 1.17.3. Update the bundle and the module is yours.
What is OpenAI Ads? OpenAI's advertising platform for campaigns shown inside ChatGPT. Merchants run product ads there, and conversion data reported through the Conversions API is how campaign performance is measured.
Can I test before sending real data? Yes. Test Mode sends events flagged validate_only, so OpenAI validates the payload without recording a conversion.
Where is OpenAI Ads available? OpenAI Ads is early access and currently open to advertisers in a limited set of countries, with availability expanding. The addon works wherever your OpenAI Ads account is active.
Which Magento editions are supported? Magento Open Source, Commerce, and Commerce Cloud, versions 2.3.0 through 2.4.9.