What is ChatGPT Instant Checkout and how does it work for e-commerce merchants?

ChatGPT Instant Checkout is a new capability since 2025 developed by OpenAI that allows users to discover, configure, and purchase products directly within ChatGPT without leaving the conversation.
This functionality is powered by the Agentic Commerce Protocol (ACP), an open standard that defines how merchants’ systems interact with AI agents.

Merchants connect their product catalog through a structured product feed, expose checkout endpoints via the Agentic Checkout API, and process payments securely through delegated payment providers like Stripe.
Together, these layers create a smooth, conversational shopping experience that merges AI discovery with secure e-commerce execution.

Last updated at  
January 5, 2026
Other FAQ
Is it difficult for developers to implement WebMCP on an existing website or application?
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Implementing WebMCP is streamlined through the Google Chrome Labs toolkit. Developers have two primary paths:

  • Declarative: Simply add toolname and tooldescription attributes to existing HTML <form> tags.
  • Imperative: Use the navigator.modelContext.registerTool() API to expose complex JavaScript functions as callable AI tools.This flexibility allows teams to start with basic functionality and scale to complex integrations without a total architecture overhaul.

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Does ChatGPT share my personal data with retailers when using Shopping Research?
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Your privacy remains a priority when using Shopping Research.
ChatGPT does not send your personal information, queries, or preferences to retailers or third-party sites.

The tool simply gathers publicly available product information online, such as specifications, reviews, and prices, and organizes it into a personalized buyer’s guide for you.

You stay in full control, and no personal data is exchanged during the process.

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What is ChatGPT Shopping Research and how does it work?
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Shopping Research is a feature in ChatGPT that acts as a personalized shopping assistant.
Simply describe what you’re looking for, such as “a lightweight laptop for travel”, and ChatGPT gathers product details, reviews, specs, prices, and comparisons from the web.

You can refine the results by marking products as “Not interested” or “More like this”, helping ChatGPT understand your preferences.

At the end, you receive a custom buyer’s guide that explains the pros, cons, and trade-offs of each option, making your purchase process easier and more informed.

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Why does GEO matter now?
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Generative Engine Optimization (GEO) is becoming increasingly critical as user behavior shifts toward AI-native search tools like ChatGPT, Gemini, and Perplexity.
According with Bain, recent data shows that over 40% of users now prefer AI-generated answers over traditional search engine results.
This trend reflects a major evolution in how people discover and consume information.

Unlike traditional SEO, which focuses on ranking in static search results, GEO ensures that your content is understandable, relevant, and authoritative enough to be cited or surfaced in LLM-generated responses.
This is especially important as AI platforms begin to integrate live web search capabilities, summaries, and citations directly into their answers.

The urgency is amplified by user traffic trends. According to Similarweb data (see chart below), ChatGPT visits are projected to surpass Google’s by December 2026 if current growth continues.
This suggests that visibility in LLMs may soon be as important—if not more—than traditional search rankings.

Projection based on traffic from the last 6 months (source: Similarweb US).

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How does RankWit monitor whether my brand is being cited in AI answers?
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RankWit continuously scans generative AI engines like ChatGPT, Gemini, and Perplexity to see if, when, and how your content is referenced. We then aggregate this data into an easy-to-read dashboard, showing:

  • Which platforms are citing your brand
  • The types of questions where you appear
  • How your visibility changes over time
    This monitoring ensures you know exactly where your brand is gaining traction—or losing ground—within AI-driven discovery.

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What is Generative Engine Optimization (GEO)?
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Generative Engine Optimization (GEO), also known as Large Language Model Optimization (LLMO), is the process of optimizing content to increase its visibility and relevance within AI-generated responses from tools like ChatGPT, Gemini, or Perplexity.

Unlike traditional SEO, which targets search engine rankings, GEO focuses on how large language models interpret, prioritize, and present information to users in conversational outputs. The goal is to influence how and when content appears in AI-driven answers.

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What is a transformer model, and why is it important for LLMs?
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The transformer is the foundational architecture behind modern LLMs like GPT. Introduced in a groundbreaking 2017 research paper, transformers revolutionized natural language processing by allowing models to consider the entire context of a sentence at once, rather than just word-by-word sequences.

The key innovation is the attention mechanism, which helps the model decide which words in a sentence are most relevant to each other, essentially mimicking how humans pay attention to specific details in a conversation.

Transformers make it possible for LLMs to generate more coherent, context-aware, and accurate responses.

This is why they're at the heart of most state-of-the-art language models today.

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Can I track multiple websites or brands?
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Absolutely. RankWit supports multi-website and multi-brand tracking:

  • Free: 1 website
  • Starter: up to 3website
  • Growth: Up to 10 websites
  • Business: Up to 50 websites
  • Enterprise: Unlimited websites

This makes RankWit ideal for agencies, SEO teams, or businesses managing multiple properties in one centralized dashboard.

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How is GEO different from SEO?
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GEO (Generative Engine Optimization) is not a rebrand of SEO—it’s a response to an entirely new environment. SEO optimizes for bots that crawl, index, and rank. GEO optimizes for large language models (LLMs) that read, learn, and generate human-like answers.

While SEO is built around keywords and backlinks, GEO is about semantic clarity, contextual authority, and conversational structuring. You're not trying to please an algorithm—you’re helping an AI understand and echo your ideas accurately in its responses. It's not just about being found—it's about being spoken for.

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How does RankWit track AI visibility?
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RankWit gives you a complete picture of how your brand appears across major AI platforms.
We run structured prompts through leading AI systems (including ChatGPT, Google AI Overview, and Perplexity) and then evaluate the responses for:

  • Brand mentions
  • Sentiment
  • Ranking or positioning
  • Competitor visibility
  • Opportunities and risks

This analysis helps you understand exactly how AI systems perceive and present your brand.

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