ChatGPT Instant Checkout Retreat: The Protocol War

September 2026 audit note

This article previously presented the reason for Instant Checkout’s change, Google UCP timing and participants, Alipay volume, protocol convergence and market forecasts as settled facts. They could not all be reverified on the corresponding live official pages and are now background hypotheses rather than conclusions. Do not use this article to assume that AI shopping, agent payments or a card credential is available in your region.

The actionable principle remains: enter payment information only on a trusted merchant checkout; set explicit budgets, per-transaction limits and notifications for automated spend; reject any agent request for CVV, passwords or one-time codes. Availability, region and payment flow are controlled by the formal product pages of OpenAI, merchants and Visa/Mastercard. Official entry: https://openai.com/。