ChatGPT Instant Checkout: what happened and what replaced it
Updated . The 24 March date identifies the announcement; the source does not establish a universal technical shutdown date. COR-2026-09-08-01.
Short answer: Instant Checkout let US ChatGPT users buy from merchants without leaving the chat. It launched on 29 September 2025 with US Etsy sellers, powered by the Agentic Commerce Protocol (ACP). On 24 March 2026 OpenAI announced a shift toward product discovery and merchant checkout: it said the initial version did not offer the level of flexibility that we aspire to provide
and began allowing merchants to use their own checkout experiences. ACP did not go away, it changed job: OpenAI extended it to carry product discovery, so merchants push feeds and promotions into ChatGPT and shoppers finish the purchase on the merchant side or inside a ChatGPT app.
The timeline
| Date | What happened |
|---|---|
| 29 Sep 2025 | Instant Checkout launches in ChatGPT for US users, starting with US Etsy sellers, powered by ACP and built with Stripe. Over a million Shopify merchants are announced as coming soon. |
| Dec 2025 to Apr 2026 | The ACP specification keeps shipping: fulfillment (2025-12-12), capability negotiation (2026-01-16), extensions and payment handlers (2026-01-30), then cart, feed, orders and MCP support (2026-04-17). |
| 24 Mar 2026 | OpenAI ships richer, more visual product discovery in ChatGPT, extends ACP to power it, and lets merchants keep their own checkout. The announcement does not specify a universal technical shutdown date for the original flow. |
| 17 Jun 2026 | Shopify opens its agentic commerce layer to all developers, removes the approval requirement, exposes a public MCP endpoint and ships a UCP Skill. In-chat buying for Shopify merchants runs on Shopify’s own layer. |
How the flow worked
- The shopper asked ChatGPT for product recommendations and decided to buy.
- A Stripe-powered checkout appeared inline in the chat; the buyer confirmed with their preferred method.
- Stripe issued a Shared Payment Token scoped to that merchant and cart total.
- ChatGPT passed the order and token to the merchant’s backend over the Agentic Commerce Protocol.
- The merchant accepted, charged the payment, remitted tax and fulfilled, exactly as it does today.
The merchant was always merchant of record. That part of the design was never the problem, and it carried over into every protocol that followed.
What ACP does instead, since March 2026
OpenAI describes the new role plainly: ACP is the connective layer between merchants and users throughout discovery
. Merchants share product feeds and promotions through it so their catalogue is fully represented in ChatGPT, and they can deliver that data directly or through third-party providers including Salesforce and Stripe. OpenAI named Target, Sephora, Nordstrom, Lowe’s, Best Buy, The Home Depot and Wayfair as integrated into ACP for discovery. Shopify merchants are covered through Shopify Catalog with no additional work.
Merchants who want a deeper native experience build a ChatGPT app instead. Walmart launched one the same day, taking users from discovery in ChatGPT into a Walmart environment with account linking, loyalty and Walmart payments.
What this changes for a merchant
The lesson is not that agentic commerce stalled. It is that the discovery layer outlived the checkout layer. A buyer who cannot find your product will never reach any checkout, native or not, which is why feed quality is now the part worth engineering. See how AI shopping agents find and read your products for what an agent actually parses on a product page.
On the payment side, the surfaces keep moving but the protocols underneath are consolidating. Read how AI agents pay for the current stack, how to accept payments from AI agents for the implementation path, and the ACP standard page for the specification itself.