Reference
Agent surfaces
In short
6 agent surfaces are profiled here, each with the matrix cells that describe it, the facts behind them and a source and read date for every claim. Together they hold 3 live cells, 0 pilot and 12 announced as of 4 Nov 2026. Live cells sit on Google AI Mode, Meta Muse, Copilot.
Agent surfaces in the matrix
| Name | Operator | What it is | Stated cells |
|---|---|---|---|
| ChatGPT shopping (Instant Checkout, ACP discovery, ChatGPT agent) | OpenAI | OpenAI's shopping surface in ChatGPT. Instant Checkout launched 29 Sep 2025 on ACP; on 24 Mar 2026 OpenAI moved purchases back to merchant-owned checkout and kept ACP for product discovery feeds. | 0 live, 0 pilot, 2 announced |
| Google AI Mode and Gemini checkout (UCP) | Google's UCP-powered checkout lets shoppers buy eligible products inside AI Mode in Search and the Gemini app with Google Pay; the merchant stays merchant of record. Universal Cart launched in the US on 15 Oct 2026. | 1 live, 0 pilot, 3 announced | |
| Perplexity shopping and Comet | Perplexity AI | Perplexity's answer-engine shopping with PayPal-powered Instant Buy (merchant stays MoR) and the Comet agentic browser, which won vacatur of Amazon's preliminary injunction at the Ninth Circuit on 4 Aug 2026. | 0 live, 0 pilot, 1 announced |
| Amazon Rufus, Alexa for Shopping and Buy for Me | Amazon | Amazon's own shopping agents: Rufus, now combined with Alexa+ as Alexa for Shopping, and Buy for Me, which checks out on third-party brand sites with the customer's card. Amazon's Agent Terms require outside agents to identify themselves. | 0 live, 0 pilot, 0 announced |
| Meta Muse | Meta | Meta's personal AI agent, launched in the US on 8 Sep 2026. It checks out with Stripe Link's agent wallet (one-time cards), with Shop Pay and PayPal announced later. Amazon blocked it on 20 Sep 2026. | 1 live, 0 pilot, 1 announced |
| Microsoft Copilot Checkout | Microsoft | In-chat checkout in Copilot for US buyers in USD, with PayPal, Shopify and Stripe as onboarding partners. The merchant stays merchant of record, Microsoft takes no commission today, and onboarding needs a UCP-compliant Merchant Center feed. | 1 live, 0 pilot, 5 announced |
See also the full matrix and the head-to-heads.
Sources
- Power product discovery in ChatGPT (merchants page), read 4 Nov 2026
- Buy it in ChatGPT: Instant Checkout and the Agentic Commerce Protocol, read 4 Nov 2026
- Google UCP developer guide, read 4 Nov 2026
- Merchant Center help: UCP-powered checkout, read 4 Nov 2026
- Comet browser, read 4 Nov 2026
- PayPal and Perplexity Launch Instant Buy, read 4 Nov 2026
- Alexa for Shopping, read 4 Nov 2026
- Introducing Muse, read 4 Nov 2026
- Agentic Commerce, Microsoft Advertising, read 4 Nov 2026
- Conversations that Convert: Copilot Checkout and Brand Agents, read 4 Nov 2026
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