In short. Instant Buy requires a compatible merchant checkout connection in addition to product eligibility.
Definition: Perplexity shows Instant Buy when the merchant is compatible with its agentic checkout experience and the product is in the supported set. Product recommendation and checkout availability are related but separate decisions.
Key facts
- Perplexity says Instant Buy sends the order and payment directly to the merchant, which fulfils the order. Perplexity's Instant Buy help page describes this flow.
- Perplexity's shopping launch describes checkout for select products from select merchants and says a product without Buy with Pro is sent to the merchant's website. Its merchant-program announcement also describes payment integrations.
- PayPal says Perplexity can show Instant Buy or Buy with PayPal for participating merchants. PayPal's AI shopping guide connects the button to merchant participation.
- OpenAI's published Agentic Checkout Spec shows the kind of merchant interface an agentic checkout can require: checkout-session endpoints, order events and payment handling on the merchant's systems. The specification is an example of a public agentic-commerce contract, not a Perplexity implementation guide.
What does Instant Buy eligibility mean?
Perplexity's help page gives a direct answer: it supports Instant Buy with merchants that are compatible with its agentic checkout experience. It says the eligible product library is expanding and that the initial set covers categories Perplexity considers popular with shoppers. Compatibility is therefore a merchant-side condition for the embedded purchase action. A product card can still appear when that condition is absent.
The same help page describes the transaction boundary. Perplexity sends the order and payment to the merchant for fulfilment, and product questions about availability, shipping, price or fulfilment go to the brand or retailer. The merchant therefore needs a checkout path that can receive the purchase and continue its own fulfilment and support process.
How do product data and checkout fit together?
Perplexity's 2024 shopping announcement separates product discovery from the purchase action. It describes Buy with Pro for select products from select merchants, with a redirect to the merchant website when Buy with Pro is unavailable. The announcement also introduces a Perplexity Merchant program for large retailers to share product specifications and lists payment integrations as a way to include merchants in one-click checkout.
This creates two observable gates on a card. Product information helps Perplexity evaluate whether an item matches a query. Checkout compatibility determines whether the card can expose an in-product purchase action. Perplexity's help page says merchants with deeper details about availability, reviews, pricing and specifications are more likely to be recommended. That statement concerns recommendation quality, while the separate compatibility statement concerns Instant Buy access.
PayPal's guide describes the same distinction from the payment side: with participating merchants, Perplexity can show an Instant Buy or Buy with PayPal option. The presence of a product card alone therefore does not identify a participating checkout connection.
What does agentic checkout require from a merchant?
Perplexity's public help page names compatibility but does not publish its endpoint list or certification process. OpenAI's official Agentic Checkout Spec provides a published comparison point. It says merchants implement five endpoints for orders on behalf of ChatGPT users and describes create, update and complete checkout sessions, with order events sent through webhooks.
The specification represents checkout state as structured data that includes items, pricing, taxes or fees, shipping, discounts and totals. It also places payment processing and order acceptance on the merchant's systems. A compact view of the published session routes is:
POST /checkout_sessions
POST /checkout_sessions/{checkout_session_id}
POST /checkout_sessions/{checkout_session_id}/complete
This public example explains why compatibility is more specific than having a product URL or a product feed. An agentic checkout connection must exchange a cart, fulfilment choices, payment information and final order state in a form the assistant can display and complete.
How should a merchant read a missing button?
A missing Instant Buy button identifies no single failure from the public documentation. It can reflect the merchant compatibility gate, the currently supported product categories, or the availability of a separate payment integration. Perplexity's documentation also says that its service is available to users in the United States and excludes Enterprise Pro and Enterprise Max plans, so user context can affect what is shown.
For a merchant review, separate three observations: whether the product appears in a card, whether the card has Instant Buy, and whether checkout can complete through the merchant's fulfilment and payment systems. Perplexity's help page directs product-specific questions to the brand or retailer, while its shopping announcement describes the merchant program and payment integrations as the routes for broader participation.
Related terms
- Perplexity shopping
- How can a merchant join Perplexity's shopping program?
- Agentic Commerce Protocol
- ChatGPT Instant Checkout
FAQ
Does every product card support Instant Buy?
No. Perplexity says the merchant must be compatible with its agentic checkout experience, and its initial eligible library covers selected categories.
Does a merchant need detailed product data?
Perplexity says deeper details about availability, reviews, pricing and specifications make a merchant more likely to be recommended. That information supports product selection, while checkout still requires merchant compatibility.
Who handles an order placed with Instant Buy?
The merchant fulfils the order and handles product-specific questions about availability, shipping, price and fulfilment.
Sources
- Perplexity Help Center, "What is Instant Buy?", 16 July 2026
- Perplexity, "Shop like a pro: Perplexity's new AI-powered shopping assistant", 18 November 2024
- PayPal, "How to shop with PayPal in AI chats: Step-by-step guide", 13 March 2026
- OpenAI Developers, "Agentic Checkout Spec", undated
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