Full Answer

OpenAI's Conversions API follows the server-to-server pattern that Meta CAPI established and Google's Enhanced Conversions extended. Instead of relying on a browser-side pixel, the store sends hashed purchase events — order value, currency, a hashed email — directly from the server to OpenAI's endpoint. OpenAI uses those signals to optimise ad delivery inside ChatGPT, the same way Meta uses CAPI data to optimise Facebook and Instagram ad placement.

For WooCommerce stores, the integration path is familiar. A server-side tracking layer that already fires events at the PHP order hook can add OpenAI as another destination alongside GA4, Meta, and Google Ads. The event payload structure mirrors what CAPI expects — hashed PII, event name, value, currency — so stores already sending server events have most of the plumbing in place. The difference is the destination endpoint and the deduplication key format.

What makes this significant is the dual-channel position. ChatGPT's shopping agents already drive organic purchases through product recommendations. Now the same platform sells paid traffic and measures its own conversions. Stores need clean separation between organic agent-driven purchases and paid ChatGPT Ads conversions to avoid double-counting and inflated ROAS. A step-by-step integration guide covers the event payload, hashing requirements, and deduplication logic.