https://agentreadycheckout.com/ The protocol support matrix for agent checkout: ACP, UCP, AP2, TAP, Agent Pay, x402 and more, by processor, platform and surface, dated and sourced. Wed, 04 Nov 2026 08:00:00 GMT https://agentreadycheckout.com/data/pay-per-call-indexhttps://agentreadycheckout.com/data/pay-per-call-indexThu, 05 Nov 2026 08:00:00 GMTDownload the aggregates of Ora's paid-capability index, read 5 Nov 2026: totals, price percentiles, networks, tags and one CSV row per host (1,586). https://agentreadycheckout.com/data/payments-adoptionhttps://agentreadycheckout.com/data/payments-adoptionThu, 05 Nov 2026 08:00:00 GMTPass rates for Ora's six Payments checks across 142,263 scans and the Payments layer average by category, from Ora's statistics read 5 Nov 2026. https://agentreadycheckout.com/method/ora-payments-layerhttps://agentreadycheckout.com/method/ora-payments-layerThu, 05 Nov 2026 08:00:00 GMTOra's six Payments checks, their points and the matrix protocol each tests, plus the seven protocols with no check, from Ora's catalog read 5 Nov 2026. https://agentreadycheckout.com/method/pay-layer-checkershttps://agentreadycheckout.com/method/pay-layer-checkersThu, 05 Nov 2026 08:00:00 GMTFive agent-readiness scanners with payment checks: what each tests and how it scores x402, MPP, ACP, UCP and AP2, with Ora as the pick, read 5 Nov 2026. https://agentreadycheckout.com/pay-per-callhttps://agentreadycheckout.com/pay-per-callThu, 05 Nov 2026 08:00:00 GMT9,977 x402 pay-per-call endpoints from Ora's paid-capability index: prices, networks and availability labels, read 5 Nov 2026 and credited to Ora. https://agentreadycheckout.com/pay-per-call/availabilityhttps://agentreadycheckout.com/pay-per-call/availabilityThu, 05 Nov 2026 08:00:00 GMTOra labels 31.6 percent of 9,977 x402 endpoints healthy: counts by method, price band and host size, and what the labels do not say, read 5 Nov 2026. https://agentreadycheckout.com/pay-per-call/by-taghttps://agentreadycheckout.com/pay-per-call/by-tagThu, 05 Nov 2026 08:00:00 GMTThe thirty most common topic tags among 9,977 x402 pay-per-call endpoints in Ora's index, with entries, hosts, share healthy and median price, read 5 Nov 2026. https://agentreadycheckout.com/pay-per-call/networkshttps://agentreadycheckout.com/pay-per-call/networksThu, 05 Nov 2026 08:00:00 GMTBase, Solana and the rest: the networks named by 9,977 x402 pay-per-call endpoints in Ora's index, with label counts and multi-network hosts, read 5 Nov 2026. https://agentreadycheckout.com/pay-per-call/price-a-callhttps://agentreadycheckout.com/pay-per-call/price-a-callThu, 05 Nov 2026 08:00:00 GMTSet a per-call price against the fee floor: Ora's index spread (median $0.01) beside Coinbase and Stripe's published fee lines, worked through, read 5 Nov 2026. https://agentreadycheckout.com/pay-per-call/priceshttps://agentreadycheckout.com/pay-per-call/pricesThu, 05 Nov 2026 08:00:00 GMTPrice spread of 9,935 x402 pay-per-call endpoints in Ora's index: median $0.01, percentiles, bands and the round figures sellers choose, read 5 Nov 2026. https://agentreadycheckout.com/pay-per-call/providershttps://agentreadycheckout.com/pay-per-call/providersThu, 05 Nov 2026 08:00:00 GMT1,586 hosts list x402 pay-per-call endpoints in Ora's index; the ten largest hold 2.7 percent. Host sizes, the top 30 and label counts, read 5 Nov 2026. https://agentreadycheckout.com/pay-per-call/x402-or-mpphttps://agentreadycheckout.com/pay-per-call/x402-or-mppThu, 05 Nov 2026 08:00:00 GMTx402 and MPP side by side for an API seller: disputes, fees, settlement rails and buyers, with Ora's index counts (9,977 x402 entries, no MPP tag) and sources. https://agentreadycheckout.com/datahttps://agentreadycheckout.com/dataWed, 04 Nov 2026 08:00:00 GMTDownload the protocol support matrix, the liability and rules tracker and commerce discovery file prevalence as CSV and JSON, with a cite line. https://agentreadycheckout.com/data/commerce-discovery-fileshttps://agentreadycheckout.com/data/commerce-discovery-filesWed, 04 Nov 2026 08:00:00 GMTHow many commerce and top-10,000 domains serve a valid UCP profile, agent registry, OpenAPI or agents.json file, from the shared crawl of 4 Nov 2026. https://agentreadycheckout.com/guides/accept-x402-for-an-apihttps://agentreadycheckout.com/guides/accept-x402-for-an-apiWed, 04 Nov 2026 08:00:00 GMTHow 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. https://agentreadycheckout.com/guides/chargebacks-when-an-agent-boughthttps://agentreadycheckout.com/guides/chargebacks-when-an-agent-boughtWed, 04 Nov 2026 08:00:00 GMTChargebacks when an agent bought: No network has an agent dispute code. Visa makes the cardholder responsible for the agent's actions within instructions. https://agentreadycheckout.com/guides/history-september-2025-to-nowhttps://agentreadycheckout.com/guides/history-september-2025-to-nowWed, 04 Nov 2026 08:00:00 GMTThe history of agent payments, September 2025 to November 2026: Agent checkout went from one in-chat button in ChatGPT. Dated and sourced. https://agentreadycheckout.com/guides/how-an-agent-checkout-flowshttps://agentreadycheckout.com/guides/how-an-agent-checkout-flowsWed, 04 Nov 2026 08:00:00 GMTHow an agent checkout actually flows, per protocol: In every live flow the agent never becomes the seller. Every claim has a source and a read date. https://agentreadycheckout.com/guides/on-none-of-the-agent-surfaceshttps://agentreadycheckout.com/guides/on-none-of-the-agent-surfacesWed, 04 Nov 2026 08:00:00 GMTWhat 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. https://agentreadycheckout.com/guides/pricing-and-fees-as-publishedhttps://agentreadycheckout.com/guides/pricing-and-fees-as-publishedWed, 04 Nov 2026 08:00:00 GMTPricing and fees as published: Most agent surfaces charge merchants nothing today. Every claim has a source and a read date. https://agentreadycheckout.com/guides/support-acp-on-stripehttps://agentreadycheckout.com/guides/support-acp-on-stripeWed, 04 Nov 2026 08:00:00 GMTHow to support ACP on Stripe: On Stripe, ACP support means accepting Shared Payment Tokens or using the Agentic Commerce Suite. https://agentreadycheckout.com/guides/support-ucp-on-shopifyhttps://agentreadycheckout.com/guides/support-ucp-on-shopifyWed, 04 Nov 2026 08:00:00 GMTHow to support UCP on Shopify: Shopify merchants do not build UCP: Shopify serves it. Every claim has a source and a read date. https://agentreadycheckout.com/guides/tap-and-agent-pay-at-the-wafhttps://agentreadycheckout.com/guides/tap-and-agent-pay-at-the-wafWed, 04 Nov 2026 08:00:00 GMTWhat TAP and Agent Pay change at the WAF: Visa TAP and Mastercard Agent Pay both sign agent requests with Web Bot Auth. Dated and sourced. https://agentreadycheckout.com/guides/tell-agent-initiated-ordershttps://agentreadycheckout.com/guides/tell-agent-initiated-ordersWed, 04 Nov 2026 08:00:00 GMTHow to tell agent-initiated orders in your data: Today there is no single flag. Use the channel (UCP or ACP session, Copilot or Google order source). https://agentreadycheckout.com/guides/test-an-agent-purchasehttps://agentreadycheckout.com/guides/test-an-agent-purchaseWed, 04 Nov 2026 08:00:00 GMTHow to test an agent purchase on your own store: Run a sandbox order through each path you enable. Every claim has a source and a read date. https://agentreadycheckout.com/guides/who-is-merchant-of-recordhttps://agentreadycheckout.com/guides/who-is-merchant-of-recordWed, 04 Nov 2026 08:00:00 GMTWho is merchant of record in each protocol: In ACP, UCP, Google AI Mode, Copilot Checkout, Perplexity Instant Buy and Muse purchases the merchant stays. https://agentreadycheckout.com/matrix/2026-11-04https://agentreadycheckout.com/matrix/2026-11-04Wed, 04 Nov 2026 08:00:00 GMTEdition 1 of the protocol support matrix, read 4 Nov 2026: counts by status, a changelog of dated moves and three charts of where protocols are live. https://agentreadycheckout.com/methodhttps://agentreadycheckout.com/methodWed, 04 Nov 2026 08:00:00 GMTHow the matrix is read: five statuses, the evidence rule, the seven-row merchant-readiness rubric, the source mix, and how Ora's Payments layer is treated. https://agentreadycheckout.com/newshttps://agentreadycheckout.com/newsWed, 04 Nov 2026 08:00:00 GMTDated news on agent checkout from August to November 2026: Visa rules, Mastercard Agent Pay, Shopify, Google, Amazon and x402, each linked to its source. https://agentreadycheckout.com/news/2026-11-04-google-brings-ucp-powered-direct-checkout-to-canada-onhttps://agentreadycheckout.com/news/2026-11-04-google-brings-ucp-powered-direct-checkout-to-canada-onWed, 04 Nov 2026 08:00:00 GMT4 Nov 2026: Google says UCP-powered direct checkout is rolling out from 4 Nov 2026 to Canadian shoppers on AI Mode in Google Search and the Gemini app. https://agentreadycheckout.com/news/2026-11-03-mastercard-discloses-an-openai-agreement-that-includeshttps://agentreadycheckout.com/news/2026-11-03-mastercard-discloses-an-openai-agreement-that-includesTue, 03 Nov 2026 08:00:00 GMT3 Nov 2026: The Paypers reports that Mastercard disclosed an agreement with OpenAI on its Q3 2026 earnings call, covering Agent Pay, payments. https://agentreadycheckout.com/news/2026-10-24-visa-core-rules-october-2026-edition-names-agenthttps://agentreadycheckout.com/news/2026-10-24-visa-core-rules-october-2026-edition-names-agentSat, 24 Oct 2026 08:00:00 GMT24 Oct 2026: The 24 Oct 2026 Visa Core Rules keep the April agentic platform requirements. Every claim has a source and a read date. https://agentreadycheckout.com/ruleshttps://agentreadycheckout.com/rulesSat, 24 Oct 2026 08:00:00 GMTA dated table of card-network and framework changes that touch agent-initiated payments, with the document, page reference and who carries the dispute. https://agentreadycheckout.com/news/2026-10-21-walmart-announces-agent-profiles-an-mcp-agent-gatewayhttps://agentreadycheckout.com/news/2026-10-21-walmart-announces-agent-profiles-an-mcp-agent-gatewayWed, 21 Oct 2026 08:00:00 GMT21 Oct 2026: Walmart will let customers authorise each AI agent with its own profile inside their account. Every claim has a source and a read date. https://agentreadycheckout.com/news/2026-10-20-mastercard-opens-agent-pay-for-machines-early-accesshttps://agentreadycheckout.com/news/2026-10-20-mastercard-opens-agent-pay-for-machines-early-accessTue, 20 Oct 2026 08:00:00 GMT20 Oct 2026: At Cloudflare Connect, Mastercard opened Early Access to Agent Pay for Machines, giving developers APIs, tools and documentation. https://agentreadycheckout.com/news/2026-10-16-shopify-checkout-mcp-and-cart-mcp-add-ucp-buyer-consenthttps://agentreadycheckout.com/news/2026-10-16-shopify-checkout-mcp-and-cart-mcp-add-ucp-buyer-consentFri, 16 Oct 2026 08:00:00 GMT16 Oct 2026: Shopify's changelog says its Checkout MCP and Cart MCP servers now support the UCP buyer consent capability. https://agentreadycheckout.com/news/2026-10-15-google-universal-cart-launches-in-the-us-across-searchhttps://agentreadycheckout.com/news/2026-10-15-google-universal-cart-launches-in-the-us-across-searchThu, 15 Oct 2026 08:00:00 GMT15 Oct 2026: Google's Universal Cart is available in the US across Search and the Gemini app. Every claim has a source and a read date. https://agentreadycheckout.com/news/2026-10-13-shopify-launches-shop-mcp-with-shop-pay-checkout-forhttps://agentreadycheckout.com/news/2026-10-13-shopify-launches-shop-mcp-with-shop-pay-checkout-forTue, 13 Oct 2026 08:00:00 GMT13 Oct 2026: Shop MCP at mcp.shop.com gives an MCP agent Catalog search over 1 billion products without an API key for search. https://agentreadycheckout.com/news/2026-10-09-shopify-sets-2026-11-02-shutdown-for-the-global-cataloghttps://agentreadycheckout.com/news/2026-10-09-shopify-sets-2026-11-02-shutdown-for-the-global-catalogFri, 09 Oct 2026 08:00:00 GMT9 Oct 2026: Shopify announced the Global Catalog REST API stops serving traffic on 2 November 2026, pushing agent developers onto the Catalog API and UCP MCP. https://agentreadycheckout.com/news/2026-10-08-crossmint-launches-agent-commerce-toolkit-with-vic-andhttps://agentreadycheckout.com/news/2026-10-08-crossmint-launches-agent-commerce-toolkit-with-vic-andThu, 08 Oct 2026 08:00:00 GMT8 Oct 2026: Crossmint launched a live, self-serve toolkit combining a PCI vault, Visa Intelligent Commerce and Mastercard Agent Pay tokenized credentials.