Guides

All guides

• How an agent checkout actually flows, per protocol
  In every live flow the agent never becomes the seller: it discovers the product, builds a cart or session, obtains a scoped token or one-time card after the user approves.
• Who is merchant of record in each protocol
  In ACP, UCP, Google AI Mode, Copilot Checkout, Perplexity Instant Buy and Muse purchases the merchant stays merchant of record.
• How to support UCP on Shopify
  Shopify merchants do not build UCP: Shopify serves it. Turn on Agentic Storefronts in Admin, keep your catalog data clean, and check that /.well-known/ucp answers on your domain.
• How to support ACP on Stripe
  On Stripe, ACP support means accepting Shared Payment Tokens or using the Agentic Commerce Suite, which shares your catalog with agents and runs checkout.
• How to accept x402 for an API
  Add x402 middleware that returns HTTP 402 with your price and accepted networks, verify and settle through a facilitator, and return the resource on retry.
• What TAP and Agent Pay change at the WAF
  Visa TAP and Mastercard Agent Pay both sign agent requests with Web Bot Auth.
• How to tell agent-initiated orders in your data
  Today there is no single flag.
• Chargebacks when an agent bought
  No network has an agent dispute code.
• What to do if you are on none of the agent surfaces
  Start with the free paths: a clean Merchant Center feed for Google and Microsoft, a fast web checkout for ChatGPT referrals.
• Pricing and fees as published
  Most agent surfaces charge merchants nothing today; the costs sit with processors.
• The history of agent payments, September 2025 to November 2026
  Agent checkout went from one in-chat button in ChatGPT (September 2025) to competing protocols, card-network rules and standards bodies.
• How to test an agent purchase on your own store
  Run a sandbox order through each path you enable: Google's UCP sandbox validation, Stripe test mode with Shared Payment Tokens and Link Agent Wallet.