--- title: "Matrix edition 4 Nov 2026, changelog and charts | Agent Ready Checkout" description: "Edition 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." canonical: https://agentreadycheckout.com/matrix/2026-11-04 site: "Agent Ready Checkout" last_updated: 2026-11-04 date: 2026-11-04 section: "Matrix" --- # Matrix edition 4 Nov 2026, changelog and charts | Agent Ready Checkout > Edition 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. Source: https://agentreadycheckout.com/matrix/2026-11-04 Site: Agent Ready Checkout Last reviewed: 2026-11-04 # Matrix edition of 4 November 2026 In short Edition 1 of the protocol support matrix, read 4 Nov 2026: 324 cells, of which 35 are live or pilot and 57 announced. This page holds the changelog and three charts: stated columns per protocol, status by column group, and dated events per month since September 2025. The matrix is re-read monthly and moves weekly. ## This edition | Item | Value | | --- | --- | | Edition date | 4 Nov 2026 | | Protocols and programs | 12 | | Columns | 27 (10 processors, 6 platforms, 5 retailers, 6 agent surfaces) | | Cells | 324 | | Live | 23 | | Pilot | 12 | | Announced | 57 | | Not supported | 3 | | No statement found | 229 | ## Changelog The first line is this edition. The lines below are the dated moves recorded since August 2026 that bear on cells in the matrix, newest first. - 4 Nov 2026 [Edition 1 published: 12 protocols across 27 columns, 324 cells read on 4 Nov 2026. 23 live, 12 pilot, 57 announced, 3 not supported, 229 with no statement found.](https://agentreadycheckout.com/matrix/2026-11-04) - 4 Nov 2026 [Google brings UCP-powered direct checkout to Canada on AI Mode and Gemini](https://agentreadycheckout.com/news/2026-11-04-google-brings-ucp-powered-direct-checkout-to-canada-on) - 3 Nov 2026 [Mastercard discloses an OpenAI agreement that includes Agent Pay](https://agentreadycheckout.com/news/2026-11-03-mastercard-discloses-an-openai-agreement-that-includes) - 24 Oct 2026 [Visa Core Rules October 2026 edition names agent provider login IDs in 10.4 evidence](https://agentreadycheckout.com/news/2026-10-24-visa-core-rules-october-2026-edition-names-agent) - 21 Oct 2026 [Walmart announces Agent Profiles, an MCP Agent Gateway beta and terms for AI agents](https://agentreadycheckout.com/news/2026-10-21-walmart-announces-agent-profiles-an-mcp-agent-gateway) - 20 Oct 2026 [Mastercard opens Agent Pay for Machines Early Access after pilots including Coinbase](https://agentreadycheckout.com/news/2026-10-20-mastercard-opens-agent-pay-for-machines-early-access) - 16 Oct 2026 [Shopify Checkout MCP and Cart MCP add UCP buyer consent](https://agentreadycheckout.com/news/2026-10-16-shopify-checkout-mcp-and-cart-mcp-add-ucp-buyer-consent) ## Chart: stated cells per protocol - live - pilot - announced - not supported or no statement found Stated cells per protocol out of 27 columns. Numbers at the bar end count cells with a stated status. | Protocol | Live | Pilot | Announced | Not supported | No statement found | | --- | --- | --- | --- | --- | --- | | ACP | 3 | 2 | 7 | 2 | 13 | | UCP | 10 | 4 | 6 | 1 | 6 | | AP2 | 0 | 1 | 10 | 0 | 16 | | Visa TAP | 0 | 1 | 5 | 0 | 21 | | Visa IC | 1 | 1 | 6 | 0 | 19 | | Mastercard Agent Pay | 1 | 1 | 8 | 0 | 17 | | Agent Pay for Machines | 0 | 1 | 7 | 0 | 19 | | Amex ACE | 0 | 0 | 6 | 0 | 21 | | x402 | 3 | 0 | 1 | 0 | 23 | | MPP | 2 | 0 | 0 | 0 | 25 | | Link for agents | 3 | 0 | 1 | 0 | 23 | | Verifiable Intent | 0 | 1 | 0 | 0 | 26 | ## Chart: status by column group - live - pilot - announced - not supported or no statement found Every cell in each column group, split by status. | Column group | Cells | Live | Pilot | Announced | Not supported | No statement found | | --- | --- | --- | --- | --- | --- | --- | | Processors | 120 | 15 | 10 | 31 | 0 | 64 | | Platforms | 72 | 3 | 2 | 9 | 0 | 58 | | Retailers | 60 | 2 | 0 | 5 | 2 | 51 | | Agent surfaces | 72 | 3 | 0 | 12 | 1 | 56 | ## Chart: dated events per month Dated events per month in the history guide. | Month | Dated events | | --- | --- | | September 2025 | 2 | | October 2025 | 3 | | November 2025 | 1 | | December 2025 | 1 | | January 2026 | 2 | | February 2026 | 0 | | March 2026 | 3 | | April 2026 | 7 | | May 2026 | 0 | | June 2026 | 3 | | July 2026 | 2 | | August 2026 | 2 | | September 2026 | 4 | | October 2026 | 4 | | November 2026 | 0 | | | | All months | 34 | ## Cite this edition **Cite this:** Agent Ready Checkout. Protocol Support Matrix, edition 4 Nov 2026. Edition of 4 Nov 2026. https://agentreadycheckout.com/matrix/2026-11-04 Download the cells as [CSV](https://agentreadycheckout.com/data/protocol-matrix-2026-11-04.csv) or [JSON](https://agentreadycheckout.com/data/protocol-matrix-2026-11-04.json). ## Sources 1. [ucp.dev/](https://ucp.dev/), read 4 Nov 2026 2. [cloud.google.com/blog/products/ai-machine-learning/announcing-agents-to-payments-ap2-protocol](https://cloud.google.com/blog/products/ai-machine-learning/announcing-agents-to-payments-ap2-protocol), read 4 Nov 2026 3. [Stripe: Developing an open standard for agentic commerce](https://stripe.com/blog/developing-an-open-standard-for-agentic-commerce), read 4 Nov 2026 4. [Visa Introduces Trusted Agent Protocol](https://usa.visa.com/about-visa/newsroom/press-releases.releaseId.21716.html), read 4 Nov 2026 5. [Cloudflare: Secure agentic commerce](https://blog.cloudflare.com/secure-agentic-commerce/), read 4 Nov 2026 6. [mastercard.com/us/en/news-and-trends/press/2025/october/Mastercard-and-PayPal-join-forces.html](https://www.mastercard.com/us/en/news-and-trends/press/2025/october/Mastercard-and-PayPal-join-forces.html), read 4 Nov 2026 7. [PayPal and Perplexity Launch Instant Buy](https://newsroom.paypal-corp.com/2025-11-PayPal-and-Perplexity-Launch-Instant-Buy), read 4 Nov 2026 8. [stripe.com/newsroom/news/agentic-commerce-suite](https://stripe.com/newsroom/news/agentic-commerce-suite), read 4 Nov 2026 9. [Conversations that Convert: Copilot Checkout and Brand Agents](https://about.ads.microsoft.com/en/blog/post/january-2026/conversations-that-convert-copilot-checkout-and-brand-agents), read 4 Nov 2026 10. [shopify.com/news/ai-commerce-at-scale](https://www.shopify.com/news/ai-commerce-at-scale), read 4 Nov 2026 11. [mastercard.com/us/en/news-and-trends/stories/2026/verifiable-intent.html](https://www.mastercard.com/us/en/news-and-trends/stories/2026/verifiable-intent.html), read 4 Nov 2026 12. [The Block: Tempo mainnet goes live with MPP](https://www.theblock.co/post/394131/tempo-mainnet-goes-live-with-machine-payments-protocol-for-agents), read 4 Nov 2026 13. [Powering Product Discovery in ChatGPT](https://openai.com/index/powering-product-discovery-in-chatgpt/), read 4 Nov 2026 14. [Linux Foundation launches the x402 Foundation](https://www.linuxfoundation.org/press/linux-foundation-is-launching-the-x402-foundation-and-welcoming-the-contribution-of-the-x402-protocol), read 4 Nov 2026 15. [Visa opens the door to AI-driven shopping (Intelligent Commerce Connect)](https://www.visa.co.uk/about-visa/newsroom/press-releases.3442048.html), read 4 Nov 2026 16. [Amex Agentic Commerce Experiences](https://www.americanexpress.com/en-us/company/agentic-commerce/), read 4 Nov 2026 17. [ACP changelog 2026-04-17](https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/changelog/2026-04-17.md), read 4 Nov 2026 18. [Visa Core Rules and Visa Product and Service Rules, 24 October 2026](https://usa.visa.com/dam/VCOM/download/about-visa/visa-rules-public.pdf), read 4 Nov 2026 19. [ACP MAINTAINERS.md](https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/MAINTAINERS.md), read 4 Nov 2026 20. [FIDO Alliance to develop standards for trusted AI agent interactions](https://fidoalliance.org/fido-alliance-to-develop-standards-for-trusted-ai-agent-interactions/), read 4 Nov 2026 21. [Mastercard launches Agent Pay for Machines](https://www.mastercard.com/us/en/news-and-trends/press/2026/june/mastercard-launches-agent-pay-for-machines.html), read 4 Nov 2026 22. [adyen.com/press-and-media/adyen-agentic](https://www.adyen.com/press-and-media/adyen-agentic), read 4 Nov 2026 23. [shopify.com/news/spring-26-edition-dev](https://shopify.com/news/spring-26-edition-dev), read 4 Nov 2026 24. [x402 Foundation operational launch](https://x402.org/linux-foundation-announces-operational-launch-of-x402-foundation-to-standardize-internet-native-payments-for-ai-agents-and-applications/), read 4 Nov 2026 25. [docs.commercetools.com/api/releases/2026-07-30-ai-hub-is-now-generally-available](https://docs.commercetools.com/api/releases/2026-07-30-ai-hub-is-now-generally-available), read 4 Nov 2026 26. [Perplexity Overturns Amazon Ban on AI Shopping Bot on Appeal](https://news.bloomberglaw.com/ip-law/perplexity-overturns-amazon-ban-on-ai-shopping-bot-on-appeal), read 4 Nov 2026 27. [UCP release v2026-08-25](https://github.com/Universal-Commerce-Protocol/ucp/releases/tag/v2026-08-25), read 4 Nov 2026 28. [Stripe helps Muse shop across the internet with Link](https://stripe.com/newsroom/news/stripe-helps-meta-muse-shop-with-link), read 4 Nov 2026 29. [Amazon blocks Meta's Muse agent from shopping on users' behalf](https://siliconangle.com/2026/09/21/amazon-blocks-metas-muse-agent-from-shopping-on-users-behalf/), read 4 Nov 2026 30. [x402 exact scheme on Lightning (lnbtc)](https://github.com/x402-foundation/x402/blob/main/specs/schemes/exact/scheme_exact_lnbtc.md), read 4 Nov 2026 31. [Mastercard trust and intelligence services](https://www.mastercard.com/us/en/news-and-trends/press/2026/september/new-trust-and-intelligence-services.html), read 4 Nov 2026 32. [shopify.dev/changelog/posts/add-shopping-and-shop-pay-checkout-to-any-agent-with-shop-mcp](https://shopify.dev/changelog/posts/add-shopping-and-shop-pay-checkout-to-any-agent-with-shop-mcp), read 4 Nov 2026 33. [Watch Mastercard Agent Pay for Machines in action](https://www.mastercard.com/global/en/news-and-trends/press/2026/october/Mastercard-Agent-Pay-for-Machines-in-action.html), read 4 Nov 2026 34. [corporate.walmart.com/news/2026/10/Making-It-Possible-for-Agents-to-Shop-on-Behalf-of-Customers](https://corporate.walmart.com/news/2026/10/Making-It-Possible-for-Agents-to-Shop-on-Behalf-of-Customers), read 4 Nov 2026 Last reviewed 4 Nov 2026 ## Edition Matrix edition of 4 Nov 2026. Reviewed 4 Nov 2026, [34 sources](#sources-h). ## Method [How cells, sources and read dates are defined](https://agentreadycheckout.com/method)