buffy.blog
Series · 21 articles

Agentic Commerce

AI agents are starting to discover, compare, and buy on behalf of shoppers. What that shift means for brands. The protocols behind it (like the Agentic Commerce Protocol), and how to get your catalog ready to be chosen by machines.

  1. 01What is agentic commerce, and why brands should care nowAgentic commerce is when AI agents discover, compare, and buy on a shopper's behalf. It moves the buying decision from human browsing to machine selection, and changes what it takes to get chosen.2 min read
  2. 02The Agentic Commerce Protocol (ACP), explainedACP is OpenAI and Stripe's open standard that lets AI agents complete a purchase inside chat, so a shopper can buy from you without leaving ChatGPT. Here's what it is and what it asks of merchants.2 min read
  3. 03Is your catalog ready for agentic commerce?Three questions decide whether an AI agent can sell your products: can it find them, does it have enough data to show them, and can it complete checkout? A practical readiness check.2 min read
  4. 04How to prepare your product catalog for AI agentsTwenty years of feed optimization taught merchants to be brief. Short titles, minimal attributes, machine-friendly terseness. AI agents reward the opposite: verbose, conversational, structured product context. Here's the enrichment playbook.4 min read
  5. 05Stripe's Agentic Commerce Suite: what the new payments layer means for brandsStripe's Agentic Commerce Suite is a single integration that makes your products discoverable to AI agents and handles agentic checkout. Here's what it does, and the one thing it doesn't decide.4 min read
  6. 06WebMCP vs UCP: two paths to agentic commerceWebMCP and UCP are two Google-backed approaches to letting AI agents shop. They split on one question. Does the shopper bring their own agent, or borrow a third-party one? Here's the difference and what it means for brands.4 min read
  7. 07The payment rails behind agentic checkout: Visa, Mastercard, and tokenised agentsWhen an AI agent buys for you, a payment still has to clear. Visa and Mastercard are wiring tokenised, scope-limited credentials into agentic checkout. Here's how the payment layer works, and why it's separate from being chosen.4 min read
  8. 08How Shopify's agentic storefronts decide which products an AI agent seesShopify now syndicates most merchants' products to AI agents by default, but the Catalog ranks first and the agent re-ranks on its own logic. Here's how that pipeline works, the layer Shopify guesses for you, and the part you actually control.6 min read
  9. 09Why your product catalog needs a context-capture loop for agentic commerceStatic product catalogs are losing to ones that learn. A 2026 framework argues catalogs should continuously capture shopper context from answer engines, retail agents, and stores, then loop that back into the listing. Here's the idea, the six sources, and how to read it honestly.5 min read
  10. 10Why stablecoins are becoming a payment rail for AI agentsAI agents are starting to settle payments in stablecoins, not just on card rails, because sub-cent machine payments break the card-fee floor. Here's what the data shows, what the June 2026 Open USD launch signals, and why the rail still doesn't decide which product an agent picks.5 min read
  11. 11Cards vs stablecoins: how will AI agents pay?A neutral, criteria-based comparison of the two settlement rails being built for agentic checkout. Tokenised card credentials and stablecoins. Where each fits, on fees, speed, reversibility, approval, and maturity, and why neither decides which product an agent picks.3 min read
  12. 12Shopper agents: what brand-owned AI agents mean for product visibilityA shopper agent is a brand-owned AI agent that handles the shopping conversation. Discovery to checkout. In your voice, and increasingly plugs into ChatGPT, Gemini, and Google AI Mode. The mid-2026 launches make it real. But deploying one doesn't decide whether an engine surfaces your products; your catalog and entity strength still do.5 min read
  13. 13Discover in AI, buy on your site: what OpenAI scaling back Instant Checkout meansOpenAI is pulling native 'Instant Checkout' out of ChatGPT and moving it to its Apps platform after only a few dozen merchants went live. The durable lesson isn't that AI shopping failed. It's that discovery inside AI keeps growing while the checkout rail consolidates. Optimise to be discovered in AI and convert on your own site.4 min read
  14. 14What is x402? The HTTP-native payment standard for AI agentsx402 revives the dormant HTTP 402 'Payment Required' status so an AI agent can pay for a page, API call, or product inside an ordinary web request, no checkout page. On 14 July 2026 the Linux Foundation launched the x402 Foundation to steward it, with 40 members including Google, Stripe, Visa, Mastercard, Cloudflare, and Coinbase. Here is what x402 is, how the handshake works, and where it sits versus ACP and the card/stablecoin rails.6 min read
  15. 15What is AP2 (Agent Payments Protocol)?AP2 is Google's open protocol that gives an AI agent a cryptographically signed permission slip from a human before it can spend money. It answers the question every merchant and bank asks an agent purchase: did the person actually authorise this? Here is what AP2 is, how its three Mandates work, and where it sits versus ACP and x402.6 min read
  16. 16ACP vs AP2 vs x402: how the agent-payment standards compareA neutral, criteria-based comparison of the three standards being built for agent purchases — the Agentic Commerce Protocol (checkout orchestration), AP2 (payment authorisation), and x402 (the HTTP payment request). They sit at different layers and mostly complement each other. Here is what each does, who is behind it, and how they fit together.4 min read
  17. 17What is UCP (Universal Commerce Protocol)?UCP is Google's open-source standard for the full agentic shopping journey — how an AI agent discovers products, builds a cart, checks out, and tracks the order across a merchant. It is the commerce-orchestration counterpart to OpenAI and Stripe's ACP, and it hands payment off to AP2. Here is what UCP is, what it standardises, and where it sits in the agentic-commerce stack.6 min read
  18. 18How to get your store into Google's Universal Cart (UCP)Google's Universal Cart lets shoppers buy from your store inside Search and Gemini without loading your site — if your catalog is exposed through the Universal Commerce Protocol. Here is the practical readiness path: the Merchant Center baseline, the catalog work, the checkout choice, and how to tell whether agents actually surface you.4 min read
  19. 19What is Amazon Rufus (Alexa for Shopping)?Amazon Rufus — renamed Alexa for Shopping in May 2026 — is Amazon's generative-AI shopping assistant, built on Amazon Bedrock, that answers product questions and recommends items inside the Amazon app and site. Here is how it works, what it reads to decide what to surface, and what that means for whether your products get chosen.5 min read
  20. 20Intent-driven category pages: match how shoppers actually askMost category pages are named after products ("jeans", "sneakers"). Shoppers and AI assistants ask in intent ("airport outfits", "shoes for wide feet on roads"). Building category and navigation pages around the way people phrase their need, not your internal taxonomy, is one of the highest-leverage moves for AI shopping visibility. Here's how it works.5 min read
  21. 21Agentic commerce for services: getting bookings, not just products, chosen by AI agentsAgentic commerce started with products in a cart, but it is moving into services — hotel stays, reservations, food orders and appointments an AI agent can complete on a shopper's behalf. Google's 2026 expansion of the Universal Commerce Protocol into hotel booking and food delivery is the clearest signal yet. Here's what 'agentic commerce for services' means, how a bookable offer differs from a product for an agent, and what a service business needs to expose to be chosen.6 min read