---
type: Agentic Web Standard
title: "Agentic Commerce Protocol"
description: "How do a buyer's agent and a merchant complete a deterministic, programmatic checkout without the agent becoming the merchant of record?"
resource: "https://github.com/agentic-commerce-protocol/agentic-commerce-protocol"
tags: ["pay", "endpoint", "vendor-consortium", "agent-checkout", "accept-agent-payments"]
status: stable
generated: { by: agenticweb-builder/1.0, at: 2026-10-30T00:00:00Z }
verified: { by: process:agenticweb-engine, at: 2026-10-29T00:00:00Z }
stale_after: 2026-11-28T00:00:00Z
sources:
  - id: ref-1
    resource: "https://web.archive.org/web/20261022061422/https://openai.com/index/buy-it-in-chatgpt/"
    title: "OpenAI, Buy it in ChatGPT: Instant Checkout and the Agentic Commerce Protocol (OpenAI blog), 2025-09-29 (the live page returned HTTP 403 to scripted fetches on 2026-10-28, so the quotes were checked against the Wayback Machine snapshot of 2026-10-22, the URL given here): \"September 29, 2025 Product Buy it in ChatGPT: Instant Checkout and the Agentic Commerce Protocol\" \"Starting today, we're taking the first steps toward ChatGPT helping people buy them too—beginning with Instant Checkout, powered by the Agentic Commerce Protocol, built with Stripe.\" \"U.S. ChatGPT Plus, Pro, and Free users can now buy directly from U.S. Etsy sellers right in chat, with over a million Shopify merchants, like Glossier, SKIMS, Spanx and Vuori, coming soon.\" \"The Agentic Commerce Protocol is an open standard for AI commerce that lets AI agents, people, and businesses work together to complete purchases.\" \"accept agentic payments either by using Stripe's new Shared Payment Token API\" \"or adopting the Delegated Payments Spec in the Agentic Commerce Protocol—all without changing their existing payment processor.\""
    last_modified: 2025-09-29T00:00:00Z
  - id: ref-2
    resource: "https://web.archive.org/web/20261012013103/https://openai.com/index/powering-product-discovery-in-chatgpt/"
    title: "OpenAI, Powering Product Discovery in ChatGPT (OpenAI blog), 2026-03-24 (the live page returned HTTP 403 to scripted fetches on 2026-10-28, so the quotes were checked against the Wayback Machine snapshot of 2026-10-12, the URL given here): \"March 24, 2026 Product Powering Product Discovery in ChatGPT\" \"To power this, we're expanding the Agentic Commerce Protocol (ACP) to support product discovery—bringing more complete, relevant, and up-to-date information directly into ChatGPT.\" \"Through ACP, merchants share product feeds and promotions so their catalogs are fully represented in ChatGPT.\" \"We've found that the initial version of Instant Checkout did not offer the level of flexibility that we aspire to provide, so we're allowing merchants to use their own checkout experiences while we focus our efforts on product discovery.\" \"Already, leading retailers including Target, Sephora, Nordstrom, Lowe's, Best Buy, The Home Depot, and Wayfair have integrated into ACP for discovery.\" \"Walmart is introducing an in-ChatGPT app experience that takes users from discovery in ChatGPT into a tailored Walmart environment that supports account linking, loyalty and Walmart payments.\""
    last_modified: 2026-03-24T00:00:00Z
  - id: ref-3
    resource: "https://stripe.com/blog/developing-an-open-standard-for-agentic-commerce"
    title: "Jeff Weinstein and Steve Kaliski, Stripe, Developing an open standard for agentic commerce (Stripe blog), 2025-09-29: \"Developing an open standard for agentic commerce September 29, 2025 Jeff Weinstein Product Lead, Agentic Commerce Steve Kaliski\" \"Instant Checkout is powered by the Agentic Commerce Protocol (ACP), a new open standard codeveloped by Stripe and OpenAI that enables programmatic commerce flows between buyers, AI agents, and businesses.\" \"ACP is open source, Apache 2.0 licensed, and community-designed.\""
    last_modified: 2025-09-29T00:00:00Z
  - id: ref-4
    resource: "https://github.com/agentic-commerce-protocol/agentic-commerce-protocol"
    title: "OpenAI and Stripe, agentic-commerce-protocol/agentic-commerce-protocol GitHub repository (quoted from the GitHub API record), checked 2026-10-28: \"\"created_at\": \"2025-09-29T04:09:29Z\"\" \"\"description\": \"The Agentic Commerce Protocol (ACP) is an interaction model and open standard for connecting buyers, their AI agents, and businesses to complete purchases seamlessly. The specification is currently maintained by OpenAI and Stripe.\"\" \"\"spdx_id\": \"Apache-2.0\"\""
    last_modified: 2026-10-28T00:00:00Z
  - id: ref-5
    resource: "https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/README.md"
    title: "agentic-commerce-protocol/agentic-commerce-protocol, README.md (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: \"The specification is maintained by OpenAI and Stripe and is currently in beta.\" \"ACP uses date-based versioning in YYYY-MM-DD format.\" \"ACP has been first implemented by both OpenAI and Stripe, providing production-ready reference implementations for merchants and developers\" \"All contributors must sign a CLA before contributions can be accepted.\" \"2026-01-16/ # Capability negotiation\""
    last_modified: 2026-10-28T00:00:00Z
  - id: ref-6
    resource: "https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/MAINTAINERS.md"
    title: "agentic-commerce-protocol/agentic-commerce-protocol, MAINTAINERS.md (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: \"Lead maintainers OpenAI Stripe Meta\""
    last_modified: 2026-10-28T00:00:00Z
  - id: ref-7
    resource: "https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/docs/governance.md"
    title: "agentic-commerce-protocol/agentic-commerce-protocol, docs/governance.md (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: \"The TSC has up to 7 seats. Each seat is held by one organization, including OpenAI and Stripe.\" \"TSC seats are appointed by the Founding Maintainers (OpenAI and Stripe)\" \"the Founding Maintainers' veto authority may be exercised as a last resort.\" \"Current TSC Members Seat Organization Representative(s) 1 OpenAI aravindrao-openai 2 Stripe prasad-stripe 3 Meta lhwa\""
    last_modified: 2026-10-28T00:00:00Z
  - id: ref-8
    resource: "https://api.github.com/repos/agentic-commerce-protocol/agentic-commerce-protocol/commits?path=docs/governance.md&per_page=30"
    title: "GitHub API, commit history of docs/governance.md in agentic-commerce-protocol/agentic-commerce-protocol, checked 2026-10-28: \"\"date\": \"2025-12-02T00:44:03Z\" }, \"committer\": { \"name\": \"GitHub\", \"email\": \"noreply@github.com\", \"date\": \"2025-12-02T00:44:03Z\" }, \"message\": \"Add Governance, Principles & process docs (#43)\" \"\"date\": \"2026-03-10T17:28:47Z\" }, \"committer\": { \"name\": \"GitHub\", \"email\": \"noreply@github.com\", \"date\": \"2026-03-10T17:28:47Z\" }, \"message\": \"ADMIN: Revised governance model (#173)\" \"\"date\": \"2026-04-24T16:44:27Z\" }, \"committer\": { \"name\": \"GitHub\", \"email\": \"noreply@github.com\", \"date\": \"2026-04-24T16:44:27Z\" }, \"message\": \"ADMIN: Add Meta as TSC member (#236)\""
    last_modified: 2026-10-28T00:00:00Z
  - id: ref-9
    resource: "https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/changelog/2025-09-29.md"
    title: "agentic-commerce-protocol, changelog/2025-09-29.md (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: \"Initial release of the Agentic Commerce Protocol specification.\""
    last_modified: 2026-10-28T00:00:00Z
  - id: ref-10
    resource: "https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/changelog/2025-12-12.md"
    title: "agentic-commerce-protocol, changelog/2025-12-12.md (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: \"several breaking changes to the Agentic Commerce Protocol based on learnings from URBN and Etsy adapter implementations.\""
    last_modified: 2026-10-28T00:00:00Z
  - id: ref-11
    resource: "https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/changelog/2026-01-16.md"
    title: "agentic-commerce-protocol, changelog/2026-01-16.md (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: \"Authentication Provider Added – Initial support for an open authentication provider model, allowing merchants to specify their preferred 3DS provider.\" \"Added adyen to the provider enum for both PaymentProvider and AuthenticationProvider\""
    last_modified: 2026-10-28T00:00:00Z
  - id: ref-12
    resource: "https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/changelog/2026-01-30.md"
    title: "agentic-commerce-protocol, changelog/2026-01-30.md (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: \"Capability Negotiation Enables agents and sellers to discover and negotiate supported features during checkout.\" \"Discount Extension Rich discount code support (first ACP extension).\""
    last_modified: 2026-10-28T00:00:00Z
  - id: ref-13
    resource: "https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/changelog/2026-04-17.md"
    title: "agentic-commerce-protocol, changelog/2026-04-17.md (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: \"This release promotes the accumulated unreleased ACP changes since 2026-01-30.\" \"Previous version 2026-01-30 deprecated\" \"Cart Capability Added -- pre-checkout cart management for incremental basket building.\" \"These endpoints are hosted by Agents and called by merchants. The Feed API is a push model: merchants push product catalog metadata and product records to Agents, rather than Agents pulling catalog data from merchant-hosted endpoints.\" \"Added -- discovery document at /.well-known/acp.json for pre-session capability checks.\" \"transports field advertises available transport bindings (rest, mcp)\""
    last_modified: 2026-10-28T00:00:00Z
  - id: ref-14
    resource: "https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/rfcs/rfc.agentic_checkout.md"
    title: "agentic-commerce-protocol, rfcs/rfc.agentic_checkout.md (Agentic Checkout Specification) (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: \"This RFC defines the Agentic Checkout Specification (ACS), a standardized REST API contract that merchants SHOULD implement to support experiences across agent platforms.\" \"The merchant remains the system of record for all orders, payments, taxes, and compliance.\""
    last_modified: 2026-10-28T00:00:00Z
  - id: ref-15
    resource: "https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/rfcs/rfc.delegate_payment.md"
    title: "agentic-commerce-protocol, rfcs/rfc.delegate_payment.md (Delegate Payment API) (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: \"Status: Draft Version: 2025-09-29\" \"This RFC defines a single, MUST-implement HTTP endpoint that issues a delegated vault token for a payment credential.\" \"The token may then be used by the merchant's existing PSP only within explicit Allowance constraints.\""
    last_modified: 2026-10-28T00:00:00Z
  - id: ref-16
    resource: "https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/rfcs/rfc.product_feeds.md"
    title: "agentic-commerce-protocol, rfcs/rfc.product_feeds.md (Product Feeds) (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: \"Status: Proposal Version: unreleased\" \"Product feeds give merchants and seller platforms a standard way to publish product catalog data that agents can consume before checkout.\""
    last_modified: 2026-10-28T00:00:00Z
  - id: ref-17
    resource: "https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/rfcs/rfc.discovery.md"
    title: "agentic-commerce-protocol, rfcs/rfc.discovery.md (discovery document) (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: \"This RFC introduces a well-known discovery document (/.well-known/acp.json) for the Agentic Commerce Protocol (ACP).\" \"The document allows agents to determine whether a seller supports ACP, which protocol version is available, what transports are offered, and what capabilities the seller provides, all before creating a checkout session and without requiring authentication.\""
    last_modified: 2026-10-28T00:00:00Z
  - id: ref-18
    resource: "https://docs.stripe.com/agentic-commerce/concepts/shared-payment-tokens"
    title: "Stripe, Shared payment tokens (Stripe Documentation), checked 2026-10-28: \"Public preview Grant and receive scoped payment credentials for agent-initiated purchases.\" \"Shared payment tokens (SPTs) grant sellers scoped access to customers' payment methods for agent-initiated purchases.\""
    last_modified: 2026-10-28T00:00:00Z
  - id: ref-19
    resource: "https://www.agenticcommerce.dev/"
    title: "Agentic Commerce Protocol website (agenticcommerce.dev), checked 2026-10-29: \"ACP is open source and community-designed under the Apache 2.0 license.\" \"Publish your checkout configuration with a traditional API or MCP.\" \"Businesses can use ACP with any compatible PSP—Stripe is the first compatible PSP with its Shared Payment Token.\""
    last_modified: 2026-10-29T00:00:00Z
  - id: ref-20
    resource: "https://web.archive.org/web/20251220210109/https://www.etsy.com/news/meeting-buyers-where-they-are-etsy-partners-with-openai-to-enable-ai-powered-shopping"
    title: "Rafe Colburn, Etsy, Meeting Buyers Where They Are: Etsy partners with OpenAI to enable AI-powered shopping (Etsy News), 2025-09-29 (the live page returned HTTP 403 to scripted fetches on 2026-10-28, so the quotes were checked against the Wayback Machine snapshot of 2025-12-20, the URL given here): \"Etsy partners with OpenAI to enable AI-powered shopping by Rafe Colburn Sep 29, 2025\" \"Starting today, ChatGPT users in the U.S. can discover, browse, and purchase items on Etsy directly through ChatGPT.\""
    last_modified: 2025-09-29T00:00:00Z
  - id: ref-21
    resource: "https://www.salesforce.com/news/press-releases/2025/10/14/stripe-openai-agentic-commerce-protocol-announcement/?bc=OTH"
    title: "Salesforce, Salesforce Announces Support for Agentic Commerce Protocol with Stripe (press release), 2025-10-14: \"SAN FRANCISCO — October 14, 2025 — Salesforce (NYSE: CRM) today announced a collaboration with Stripe and OpenAI to build an Instant Checkout integration guided by the new Agentic Commerce Protocol (ACP).\""
    last_modified: 2025-10-14T00:00:00Z
  - id: ref-22
    resource: "https://commercetools.com/press-releases/commercetools-partners-with-stripe-to-launch-acp"
    title: "commercetools, commercetools partners with Stripe in its launch of the ACP (press release), 2025-09-30: \"BOSTON – September 30, 2025 – commercetools, the leading AI-first commerce platform for global enterprises, today announced it has joined Stripe and OpenAI as a launch partner of the Agentic Commerce Protocol (ACP).\""
    last_modified: 2025-09-30T00:00:00Z
  - id: ref-23
    resource: "https://corporate.walmart.com/news/2025/10/14/walmart-partners-with-openai-to-create-ai-first-shopping-experiences"
    title: "Walmart, Walmart Partners with OpenAI to Create AI-First Shopping Experiences (Walmart corporate news), 2025-10-14: \"Oct. 14, 2025\" \"Today, the company announced a new partnership with OpenAI that will start with allowing customers and members to soon shop Walmart through ChatGPT using Instant Checkout.\""
    last_modified: 2025-10-14T00:00:00Z
  - id: ref-24
    resource: "https://www.shopify.com/news/shopify-open-ai-commerce"
    title: "Shopify, Shopify and OpenAI bring commerce to ChatGPT (Shopify News), 2025-09-29: \"Shopify and OpenAI bring commerce to ChatGPT September 29, 2025\" \"Shopify merchants will be able to sell directly through ChatGPT conversations— no links or redirects, just seamless commerce.\""
    last_modified: 2025-09-29T00:00:00Z
  - id: ref-25
    resource: "https://about.ads.microsoft.com/en/blog/post/january-2026/conversations-that-convert-copilot-checkout-and-brand-agents"
    title: "Nayna Sheth and Ravi Yada, Microsoft Advertising, Conversations that Convert: Copilot Checkout and Brand Agents (Microsoft Advertising blog), 2026-01-08: \"Copilot Checkout and Brand Agents by Nayna Sheth, Ravi Yada January 08, 2026\" \"Microsoft is adopting open standards like the Agentic Commerce Protocol (ACP) to ensure merchant onboarding is seamless and scalable.\""
    last_modified: 2026-01-08T00:00:00Z
  - id: ref-26
    resource: "https://stripe.com/blog/introducing-our-agentic-commerce-solutions"
    title: "Kevin Miller, Stripe, Introducing our agentic commerce solutions (Stripe blog), 2025-10-07: \"Introducing our agentic commerce solutions October 7, 2025 Kevin Miller\" \"The ACP specification is already powering its first real-world use case: Instant Checkout in ChatGPT.\""
    last_modified: 2025-10-07T00:00:00Z
  - id: ref-27
    resource: "https://stripe.com/blog/10-lessons"
    title: "Roshan Sadanani, Stripe, 10 things we learned building for the first generation of agentic commerce (Stripe blog), 2026-03-12: \"March 12, 2026 Roshan Sadanani\" \"Over the past six months, we launched the Agentic Commerce Protocol (ACP), an open checkout specification that lets buyers, AI agents, and sellers transact through APIs\" \"We're starting with support for x402 using USDC on Base, with more protocols coming.\""
    last_modified: 2026-03-12T00:00:00Z
  - id: ref-28
    resource: "https://www.worldpay.com/en/press-releases/worldpay-unlock-new-commerce-channels-merchants-openai-agentic"
    title: "Worldpay, Worldpay to Unlock New Commerce Channels for Merchants with OpenAI Agentic Commerce Protocol (press release), 2025-10-29: \"CINCINNATI, October 29, 2025 – Worldpay ®, a global leader in payment technology, today announced its support for the Agentic Commerce Protocol (ACP)\""
    last_modified: 2025-10-29T00:00:00Z
  - id: ref-29
    resource: "https://www.checkout.com/newsroom/checkout-adopts-acp-backed-by-openai-to-power-agentic-commerce-for-enterprise-merchants"
    title: "Checkout.com, Checkout adopts ACP, backed by OpenAI, to power agentic commerce for enterprise merchants (newsroom), 2025-11-25: \"London, UK - November 25, 2025 - Checkout.com, a leading global digital payments company, today announced its support for the Agentic Commerce Protocol (ACP)\" \"Checkout.com is adopting the Agentic Commerce Protocol, backed by OpenAI.\""
    last_modified: 2025-11-25T00:00:00Z
  - id: ref-30
    resource: "https://developer.paypal.com/agent-ready/agentic-commerce-protocol"
    title: "PayPal Developer, Agentic Commerce Protocol integration (Braintree guide), last updated 2026-06-10: \"Last updated: June 10, 2026\" \"Use this guide to build a custom ChatGPT app that accepts payments using the Agentic Commerce Protocol (ACP) and the ChatGPT Apps SDK.\" \"This guide walks you through configuring Braintree as your payment provider, processing delegated payment tokens\""
    last_modified: 2026-06-10T00:00:00Z
  - id: ref-31
    resource: "https://www.digitalcommerce360.com/2026/02/16/openai-expands-agentic-commerce-push/"
    title: "Mark Brohan, OpenAI expands agentic commerce push (Digital Commerce 360), 2026-02-16: \"Mark Brohan | Feb 16, 2026\" \"Central to the strategy is the Agentic Commerce Protocol, or ACP, an open framework OpenAI co-developed with Stripe and released last year.\""
    last_modified: 2026-02-16T00:00:00Z
  - id: ref-32
    resource: "https://www.cnbc.com/2026/03/24/openai-revamps-shopping-experience-in-chatgpt-after-instant-checkout.html"
    title: "Ashley Capoot, OpenAI revamps shopping experience in ChatGPT after Instant Checkout (CNBC), 2026-03-24: \"Published Tue, Mar 24 2026 1:32 PM EDT\" \"The update comes after OpenAI pivoted away from Instant Checkout, which allowed users to purchase select items from retailers inside the chatbot.\" \"Analysts previously told CNBC that OpenAI underestimated how difficult the enablement of transactions would be. It struggled to onboard merchants, show accurate data about products and introduce multi-item carts or connect loyalty memberships.\""
    last_modified: 2026-03-24T00:00:00Z
  - id: ref-33
    resource: "https://www.pymnts.com/commerce/ecommerce/2026/openai-enhances-product-discovery-with-visual-shopping/"
    title: "PYMNTS, OpenAI Enhances Product Discovery With Visual Shopping (PYMNTS), 2026-03-24: \"By PYMNTS | March 24, 2026\" \"ACP powers this shopping experience by enabling merchants to share product feeds and promotions, and by supporting multiple delivery paths so that merchants can participate with the systems they already use, including those from Salesforce and Stripe, according to the post.\""
    last_modified: 2026-03-24T00:00:00Z
  - id: ref-34
    resource: "https://lfaidata.foundation/communityblog/2025/08/29/acp-joins-forces-with-a2a-under-the-linux-foundations-lf-ai-data/"
    title: "Kate Blair and Todd Segal, ACP Joins Forces with A2A (LF AI & Data community blog), 2025-08-29: \"ACP Joins Forces with A2A By Nora Anwar August 29, 2025\" \"IBM Research launched the Agent Communication Protocol (ACP) in March 2025 to power its BeeAI Platform\" \"Today, we're excited to share that ACP is officially merging with the A2A under the Linux Foundation (@thelinuxfoundation) umbrella.\""
    last_modified: 2025-08-29T00:00:00Z
  - id: ref-35
    resource: "https://zed.dev/blog/bring-your-own-agent-to-zed"
    title: "Nathan Sobo, Bring Your Own Agent to Zed — Featuring Gemini CLI (Zed blog), 2025-08-27: \"Nathan Sobo August 27th, 2025\" \"To make this possible, we created the Agent Client Protocol (ACP), and we've partnered with Google to integrate Gemini CLI as the initial reference implementation.\""
    last_modified: 2025-08-27T00:00:00Z
  - id: ref-36
    resource: "https://github.com/agntcy/acp-spec"
    title: "AGNTCY, agntcy/acp-spec (Agent Connect Protocol Specification) README (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: \"The Agent Connect Protocol defines a standard interface to invoke and configure remote agents over an API.\""
    last_modified: 2026-10-28T00:00:00Z
  - id: ref-37
    resource: "https://eips.ethereum.org/EIPS/eip-8183"
    title: "Davide Crapis, Bryan Lim, Tay Weixiong and Chooi Zuhwa, ERC-8183: Agentic Commerce (Ethereum Improvement Proposals), created 2026-02-25: \"Created 2026-02-25\" \"This specification defines the Agentic Commerce Protocol: a job with escrowed budget, four states (Open → Funded → Submitted → Terminal), and an evaluator who alone may mark the job completed.\""
    last_modified: 2026-02-25T00:00:00Z
  - id: ref-38
    resource: "https://developers.google.com/merchant/ucp"
    title: "Google, Google Universal Commerce Protocol (UCP) Guide (Google for Developers), checked 2026-10-28: \"UCP is fully compatible with protocols such as AP2, A2A, and MCP.\""
    last_modified: 2026-10-28T00:00:00Z
  - id: ref-39
    resource: "https://github.com/google-agentic-commerce/AP2/blob/main/docs/ap2/specification.md"
    title: "Google, Agentic Payment Protocol (AP2) v0.2 specification, docs/ap2/specification.md on main (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: \"AP2 operates as a security feature within a Commerce Protocol.\" \"AP2 is designed explicitly to be compatible with the Universal Commerce Protocol (UCP) and integrates seamlessly.\""
    last_modified: 2026-10-28T00:00:00Z
  - id: ref-40
    resource: "https://chatgpt.com/merchants/"
    title: "OpenAI, ChatGPT merchants page (FAQ), checked 2026-10-29: \"If you sell through Shopify or Etsy, your catalog is already integrated, and no additional setup or application is required.\" \"Users can discover and evaluate products in ChatGPT, but purchases are completed on merchant-owned websites or apps.\""
    last_modified: 2026-10-29T00:00:00Z
  - id: ref-41
    resource: "https://web.archive.org/web/20260302064248/https://help.openai.com/en/articles/6825453-chatgpt-release-notes/"
    title: "OpenAI Help Center, ChatGPT — Release Notes (Wayback Machine snapshot of 2026-03-02, entry dated 2025-11-20), checked 2026-10-29: \"Instant Checkout now rolling out to Shopify merchants\""
    last_modified: 2025-11-20T00:00:00Z
  - id: ref-42
    resource: "https://www.shopify.com/news/agentic-commerce-momentum"
    title: "Shopify, Millions of merchants can sell in AI chats (Shopify News), 2026-03-24: \"March 24, 2026\" \"complete purchases via an in-app browser.\" \"Crucially, merchants remain the merchant of record, retaining ownership of customer relationships and data.\""
    last_modified: 2026-03-24T00:00:00Z
  - id: ref-43
    resource: "https://stripe.com/en-gr/newsroom/news/microsoft-copilot-and-stripe"
    title: "Stripe, Stripe helps power a new shopping experience in Microsoft Copilot (Stripe newsroom), 2026-01-08: \"8 January 2026\" \"Copilot users in the United States will be able to buy products from Etsy businesses and retailers like Urban Outfitters and Anthropologie in the chat using checkout powered by Stripe.\" \"To populate the checkout, Microsoft communicates with Stripe through an integration.\" \"Stripe then connects with the seller via the Agentic Commerce Protocol, an open standard for agentic commerce codeveloped by Stripe.\" \"After the buyer provides their payment credentials, Stripe issues a Shared Payment Token, a primitive that facilitates payments without exposing the buyer's credentials.\""
    last_modified: 2026-01-08T00:00:00Z
  - id: ref-44
    resource: "https://docs.adyen.com/online-payments/agentic-commerce/agent-platform/agentic-payments-acp"
    title: "Adyen, Agentic Payments integration with ACP checkout flow (Adyen Docs), checked 2026-10-29: \"Learn to delegate payments to Adyen from your agent platform in the ACP checkout flow.\" \"The merchant uses the token to process the payment with Adyen.\""
    last_modified: 2026-10-29T00:00:00Z
  - id: ref-45
    resource: "https://developers.openai.com/commerce"
    title: "OpenAI, Agentic Commerce Protocol (OpenAI Developers), checked 2026-10-29: \"enables ChatGPT to ingest structured catalog data, understand merchant inventory, and surface relevant products in context.\""
    last_modified: 2026-10-29T00:00:00Z
  - id: ref-46
    resource: "https://about.ads.microsoft.com/en/solutions/technology/agentic-commerce"
    title: "Microsoft Advertising, Agentic Commerce solutions page, checked 2026-10-29: \"You must have a MMC account and a UCP-compliant feed.\""
    last_modified: 2026-10-29T00:00:00Z
---

# Agentic Commerce Protocol

Agentic Commerce Protocol (ACP) is an agentic-web standard (endpoint) at step 7, Pay, governed by A Technical Steering Committee of up to 7 seats, one per organisation, appointed by the Founding Maintainers, OpenAI and Stripe, who keep a veto as a last resort; its status is "Beta". It answers: "How do a buyer's agent and a merchant complete a deterministic, programmatic checkout without the agent becoming the merchant of record?" Replacing or extending Checkout API, implementation status is multi-implementation (OpenAI and Stripe), last verified 2026-10-29.

# Overview

The Agentic Commerce Protocol (ACP) is an open standard that lets an AI agent take a buyer from a product to a completed purchase, while the merchant keeps the order, payment and compliance on its own systems [^ref-1][^ref-14]. OpenAI and Stripe announced it on 2025-09-29 as the protocol behind Instant Checkout in ChatGPT and maintain it on GitHub under the Apache 2.0 licence; Meta joined its steering committee in April 2026 [^ref-1][^ref-3][^ref-7][^ref-8]. The agent calls a checkout API that the merchant hosts, and the buyer's payment credential reaches the merchant as a limited, delegated token, either through the protocol's Delegate Payment endpoint or Stripe's Shared Payment Token [^ref-1][^ref-14][^ref-15][^ref-18]. In March 2026 OpenAI let merchants use their own checkouts and extended ACP to product feeds for discovery, and version 2026-04-17 added a Feed API, carts and a discovery document [^ref-2][^ref-13].

# Examples

```http
POST {origin}/checkout_sessions
# parse: Response includes an API-Version response/negotiation and a CheckoutSession object per the 2026-04-17 OpenAPI schema
# on absent: Absence proves nothing generalizable: ACP endpoints and auth are negotiated per integration and not advertised at a fixed public path, so a failed probe only shows this origin/path pair is not configured, not that ACP is unsupported.
```

# Knowledge Graph

* **Lifecycle Step**: [7 Pay](/category/pay/index.md)
* **Pairs with**: [Agent Payments Protocol (AP2)](/okf/protocols/ap2.md), [Universal Commerce Protocol (UCP)](/okf/protocols/ucp.md), [x402](/okf/protocols/x402.md), [Trusted Agent Protocol (TAP)](/okf/protocols/tap.md), [Machine Payments Protocol (MPP)](/okf/protocols/mpp.md), [Agentic Mobile Protocol (AMP)](/okf/protocols/amp-ant.md)
* **Related terms**: [ACP (four protocols)](/okf/terms/acp.md), [Idempotency-Key header](/okf/terms/idempotency-key.md), [Buyer of Record & Merchant of Record (Agentic Commerce)](/okf/terms/buyer-of-record.md)
* **Compared in**: [3-D Secure & Card Checkout vs AP2, ACP & UCP (classic vs agentic)](/compare/3d-secure-vs-ap2/index.md), [Agent Payments Protocol (AP2) vs Agentic Commerce Protocol](/compare/ap2-vs-agentic-commerce-protocol/index.md), [Universal Commerce Protocol (UCP) vs Agentic Commerce Protocol](/compare/ucp-vs-agentic-commerce-protocol/index.md), [Agent Client Protocol vs Agentic Commerce Protocol](/compare/agent-client-protocol-vs-agentic-commerce-protocol/index.md), [x402 vs Agentic Commerce Protocol](/compare/x402-vs-agentic-commerce-protocol/index.md), [Agentic Commerce Protocol vs EMV® Agentic Payments – Framework for Specifications](/compare/agentic-commerce-protocol-vs-emv-agentic-payments/index.md), [Verifiable Intent vs Agentic Commerce Protocol](/compare/vi-vs-agentic-commerce-protocol/index.md), [Agent Communication Protocol vs Agentic Commerce Protocol](/compare/agent-communication-protocol-vs-agentic-commerce-protocol/index.md), [Agent Connect Protocol vs Agentic Commerce Protocol](/compare/agent-connect-protocol-vs-agentic-commerce-protocol/index.md)

[^ref-1]: OpenAI, Buy it in ChatGPT: Instant Checkout and the Agentic Commerce Protocol (OpenAI blog), 2025-09-29 (the live page returned HTTP 403 to scripted fetches on 2026-10-28, so the quotes were checked against the Wayback Machine snapshot of 2026-10-22, the URL given here): "September 29, 2025 Product Buy it in ChatGPT: Instant Checkout and the Agentic Commerce Protocol" "Starting today, we're taking the first steps toward ChatGPT helping people buy them too—beginning with Instant Checkout, powered by the Agentic Commerce Protocol, built with Stripe." "U.S. ChatGPT Plus, Pro, and Free users can now buy directly from U.S. Etsy sellers right in chat, with over a million Shopify merchants, like Glossier, SKIMS, Spanx and Vuori, coming soon." "The Agentic Commerce Protocol is an open standard for AI commerce that lets AI agents, people, and businesses work together to complete purchases." "accept agentic payments either by using Stripe's new Shared Payment Token API" "or adopting the Delegated Payments Spec in the Agentic Commerce Protocol—all without changing their existing payment processor." (https://web.archive.org/web/20261022061422/https://openai.com/index/buy-it-in-chatgpt/)
[^ref-2]: OpenAI, Powering Product Discovery in ChatGPT (OpenAI blog), 2026-03-24 (the live page returned HTTP 403 to scripted fetches on 2026-10-28, so the quotes were checked against the Wayback Machine snapshot of 2026-10-12, the URL given here): "March 24, 2026 Product Powering Product Discovery in ChatGPT" "To power this, we're expanding the Agentic Commerce Protocol (ACP) to support product discovery—bringing more complete, relevant, and up-to-date information directly into ChatGPT." "Through ACP, merchants share product feeds and promotions so their catalogs are fully represented in ChatGPT." "We've found that the initial version of Instant Checkout did not offer the level of flexibility that we aspire to provide, so we're allowing merchants to use their own checkout experiences while we focus our efforts on product discovery." "Already, leading retailers including Target, Sephora, Nordstrom, Lowe's, Best Buy, The Home Depot, and Wayfair have integrated into ACP for discovery." "Walmart is introducing an in-ChatGPT app experience that takes users from discovery in ChatGPT into a tailored Walmart environment that supports account linking, loyalty and Walmart payments." (https://web.archive.org/web/20261012013103/https://openai.com/index/powering-product-discovery-in-chatgpt/)
[^ref-3]: Jeff Weinstein and Steve Kaliski, Stripe, Developing an open standard for agentic commerce (Stripe blog), 2025-09-29: "Developing an open standard for agentic commerce September 29, 2025 Jeff Weinstein Product Lead, Agentic Commerce Steve Kaliski" "Instant Checkout is powered by the Agentic Commerce Protocol (ACP), a new open standard codeveloped by Stripe and OpenAI that enables programmatic commerce flows between buyers, AI agents, and businesses." "ACP is open source, Apache 2.0 licensed, and community-designed." (https://stripe.com/blog/developing-an-open-standard-for-agentic-commerce)
[^ref-4]: OpenAI and Stripe, agentic-commerce-protocol/agentic-commerce-protocol GitHub repository (quoted from the GitHub API record), checked 2026-10-28: ""created_at": "2025-09-29T04:09:29Z"" ""description": "The Agentic Commerce Protocol (ACP) is an interaction model and open standard for connecting buyers, their AI agents, and businesses to complete purchases seamlessly. The specification is currently maintained by OpenAI and Stripe."" ""spdx_id": "Apache-2.0"" (https://github.com/agentic-commerce-protocol/agentic-commerce-protocol)
[^ref-5]: agentic-commerce-protocol/agentic-commerce-protocol, README.md (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: "The specification is maintained by OpenAI and Stripe and is currently in beta." "ACP uses date-based versioning in YYYY-MM-DD format." "ACP has been first implemented by both OpenAI and Stripe, providing production-ready reference implementations for merchants and developers" "All contributors must sign a CLA before contributions can be accepted." "2026-01-16/ # Capability negotiation" (https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/README.md)
[^ref-6]: agentic-commerce-protocol/agentic-commerce-protocol, MAINTAINERS.md (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: "Lead maintainers OpenAI Stripe Meta" (https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/MAINTAINERS.md)
[^ref-7]: agentic-commerce-protocol/agentic-commerce-protocol, docs/governance.md (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: "The TSC has up to 7 seats. Each seat is held by one organization, including OpenAI and Stripe." "TSC seats are appointed by the Founding Maintainers (OpenAI and Stripe)" "the Founding Maintainers' veto authority may be exercised as a last resort." "Current TSC Members Seat Organization Representative(s) 1 OpenAI aravindrao-openai 2 Stripe prasad-stripe 3 Meta lhwa" (https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/docs/governance.md)
[^ref-8]: GitHub API, commit history of docs/governance.md in agentic-commerce-protocol/agentic-commerce-protocol, checked 2026-10-28: ""date": "2025-12-02T00:44:03Z" }, "committer": { "name": "GitHub", "email": "noreply@github.com", "date": "2025-12-02T00:44:03Z" }, "message": "Add Governance, Principles & process docs (#43)" ""date": "2026-03-10T17:28:47Z" }, "committer": { "name": "GitHub", "email": "noreply@github.com", "date": "2026-03-10T17:28:47Z" }, "message": "ADMIN: Revised governance model (#173)" ""date": "2026-04-24T16:44:27Z" }, "committer": { "name": "GitHub", "email": "noreply@github.com", "date": "2026-04-24T16:44:27Z" }, "message": "ADMIN: Add Meta as TSC member (#236)" (https://api.github.com/repos/agentic-commerce-protocol/agentic-commerce-protocol/commits?path=docs/governance.md&per_page=30)
[^ref-9]: agentic-commerce-protocol, changelog/2025-09-29.md (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: "Initial release of the Agentic Commerce Protocol specification." (https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/changelog/2025-09-29.md)
[^ref-10]: agentic-commerce-protocol, changelog/2025-12-12.md (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: "several breaking changes to the Agentic Commerce Protocol based on learnings from URBN and Etsy adapter implementations." (https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/changelog/2025-12-12.md)
[^ref-11]: agentic-commerce-protocol, changelog/2026-01-16.md (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: "Authentication Provider Added – Initial support for an open authentication provider model, allowing merchants to specify their preferred 3DS provider." "Added adyen to the provider enum for both PaymentProvider and AuthenticationProvider" (https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/changelog/2026-01-16.md)
[^ref-12]: agentic-commerce-protocol, changelog/2026-01-30.md (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: "Capability Negotiation Enables agents and sellers to discover and negotiate supported features during checkout." "Discount Extension Rich discount code support (first ACP extension)." (https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/changelog/2026-01-30.md)
[^ref-13]: agentic-commerce-protocol, changelog/2026-04-17.md (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: "This release promotes the accumulated unreleased ACP changes since 2026-01-30." "Previous version 2026-01-30 deprecated" "Cart Capability Added -- pre-checkout cart management for incremental basket building." "These endpoints are hosted by Agents and called by merchants. The Feed API is a push model: merchants push product catalog metadata and product records to Agents, rather than Agents pulling catalog data from merchant-hosted endpoints." "Added -- discovery document at /.well-known/acp.json for pre-session capability checks." "transports field advertises available transport bindings (rest, mcp)" (https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/changelog/2026-04-17.md)
[^ref-14]: agentic-commerce-protocol, rfcs/rfc.agentic_checkout.md (Agentic Checkout Specification) (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: "This RFC defines the Agentic Checkout Specification (ACS), a standardized REST API contract that merchants SHOULD implement to support experiences across agent platforms." "The merchant remains the system of record for all orders, payments, taxes, and compliance." (https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/rfcs/rfc.agentic_checkout.md)
[^ref-15]: agentic-commerce-protocol, rfcs/rfc.delegate_payment.md (Delegate Payment API) (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: "Status: Draft Version: 2025-09-29" "This RFC defines a single, MUST-implement HTTP endpoint that issues a delegated vault token for a payment credential." "The token may then be used by the merchant's existing PSP only within explicit Allowance constraints." (https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/rfcs/rfc.delegate_payment.md)
[^ref-16]: agentic-commerce-protocol, rfcs/rfc.product_feeds.md (Product Feeds) (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: "Status: Proposal Version: unreleased" "Product feeds give merchants and seller platforms a standard way to publish product catalog data that agents can consume before checkout." (https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/rfcs/rfc.product_feeds.md)
[^ref-17]: agentic-commerce-protocol, rfcs/rfc.discovery.md (discovery document) (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: "This RFC introduces a well-known discovery document (/.well-known/acp.json) for the Agentic Commerce Protocol (ACP)." "The document allows agents to determine whether a seller supports ACP, which protocol version is available, what transports are offered, and what capabilities the seller provides, all before creating a checkout session and without requiring authentication." (https://github.com/agentic-commerce-protocol/agentic-commerce-protocol/blob/main/rfcs/rfc.discovery.md)
[^ref-18]: Stripe, Shared payment tokens (Stripe Documentation), checked 2026-10-28: "Public preview Grant and receive scoped payment credentials for agent-initiated purchases." "Shared payment tokens (SPTs) grant sellers scoped access to customers' payment methods for agent-initiated purchases." (https://docs.stripe.com/agentic-commerce/concepts/shared-payment-tokens)
[^ref-19]: Agentic Commerce Protocol website (agenticcommerce.dev), checked 2026-10-29: "ACP is open source and community-designed under the Apache 2.0 license." "Publish your checkout configuration with a traditional API or MCP." "Businesses can use ACP with any compatible PSP—Stripe is the first compatible PSP with its Shared Payment Token." (https://www.agenticcommerce.dev/)
[^ref-20]: Rafe Colburn, Etsy, Meeting Buyers Where They Are: Etsy partners with OpenAI to enable AI-powered shopping (Etsy News), 2025-09-29 (the live page returned HTTP 403 to scripted fetches on 2026-10-28, so the quotes were checked against the Wayback Machine snapshot of 2025-12-20, the URL given here): "Etsy partners with OpenAI to enable AI-powered shopping by Rafe Colburn Sep 29, 2025" "Starting today, ChatGPT users in the U.S. can discover, browse, and purchase items on Etsy directly through ChatGPT." (https://web.archive.org/web/20251220210109/https://www.etsy.com/news/meeting-buyers-where-they-are-etsy-partners-with-openai-to-enable-ai-powered-shopping)
[^ref-21]: Salesforce, Salesforce Announces Support for Agentic Commerce Protocol with Stripe (press release), 2025-10-14: "SAN FRANCISCO — October 14, 2025 — Salesforce (NYSE: CRM) today announced a collaboration with Stripe and OpenAI to build an Instant Checkout integration guided by the new Agentic Commerce Protocol (ACP)." (https://www.salesforce.com/news/press-releases/2025/10/14/stripe-openai-agentic-commerce-protocol-announcement/?bc=OTH)
[^ref-22]: commercetools, commercetools partners with Stripe in its launch of the ACP (press release), 2025-09-30: "BOSTON – September 30, 2025 – commercetools, the leading AI-first commerce platform for global enterprises, today announced it has joined Stripe and OpenAI as a launch partner of the Agentic Commerce Protocol (ACP)." (https://commercetools.com/press-releases/commercetools-partners-with-stripe-to-launch-acp)
[^ref-23]: Walmart, Walmart Partners with OpenAI to Create AI-First Shopping Experiences (Walmart corporate news), 2025-10-14: "Oct. 14, 2025" "Today, the company announced a new partnership with OpenAI that will start with allowing customers and members to soon shop Walmart through ChatGPT using Instant Checkout." (https://corporate.walmart.com/news/2025/10/14/walmart-partners-with-openai-to-create-ai-first-shopping-experiences)
[^ref-24]: Shopify, Shopify and OpenAI bring commerce to ChatGPT (Shopify News), 2025-09-29: "Shopify and OpenAI bring commerce to ChatGPT September 29, 2025" "Shopify merchants will be able to sell directly through ChatGPT conversations— no links or redirects, just seamless commerce." (https://www.shopify.com/news/shopify-open-ai-commerce)
[^ref-25]: Nayna Sheth and Ravi Yada, Microsoft Advertising, Conversations that Convert: Copilot Checkout and Brand Agents (Microsoft Advertising blog), 2026-01-08: "Copilot Checkout and Brand Agents by Nayna Sheth, Ravi Yada January 08, 2026" "Microsoft is adopting open standards like the Agentic Commerce Protocol (ACP) to ensure merchant onboarding is seamless and scalable." (https://about.ads.microsoft.com/en/blog/post/january-2026/conversations-that-convert-copilot-checkout-and-brand-agents)
[^ref-26]: Kevin Miller, Stripe, Introducing our agentic commerce solutions (Stripe blog), 2025-10-07: "Introducing our agentic commerce solutions October 7, 2025 Kevin Miller" "The ACP specification is already powering its first real-world use case: Instant Checkout in ChatGPT." (https://stripe.com/blog/introducing-our-agentic-commerce-solutions)
[^ref-27]: Roshan Sadanani, Stripe, 10 things we learned building for the first generation of agentic commerce (Stripe blog), 2026-03-12: "March 12, 2026 Roshan Sadanani" "Over the past six months, we launched the Agentic Commerce Protocol (ACP), an open checkout specification that lets buyers, AI agents, and sellers transact through APIs" "We're starting with support for x402 using USDC on Base, with more protocols coming." (https://stripe.com/blog/10-lessons)
[^ref-28]: Worldpay, Worldpay to Unlock New Commerce Channels for Merchants with OpenAI Agentic Commerce Protocol (press release), 2025-10-29: "CINCINNATI, October 29, 2025 – Worldpay ®, a global leader in payment technology, today announced its support for the Agentic Commerce Protocol (ACP)" (https://www.worldpay.com/en/press-releases/worldpay-unlock-new-commerce-channels-merchants-openai-agentic)
[^ref-29]: Checkout.com, Checkout adopts ACP, backed by OpenAI, to power agentic commerce for enterprise merchants (newsroom), 2025-11-25: "London, UK - November 25, 2025 - Checkout.com, a leading global digital payments company, today announced its support for the Agentic Commerce Protocol (ACP)" "Checkout.com is adopting the Agentic Commerce Protocol, backed by OpenAI." (https://www.checkout.com/newsroom/checkout-adopts-acp-backed-by-openai-to-power-agentic-commerce-for-enterprise-merchants)
[^ref-30]: PayPal Developer, Agentic Commerce Protocol integration (Braintree guide), last updated 2026-06-10: "Last updated: June 10, 2026" "Use this guide to build a custom ChatGPT app that accepts payments using the Agentic Commerce Protocol (ACP) and the ChatGPT Apps SDK." "This guide walks you through configuring Braintree as your payment provider, processing delegated payment tokens" (https://developer.paypal.com/agent-ready/agentic-commerce-protocol)
[^ref-31]: Mark Brohan, OpenAI expands agentic commerce push (Digital Commerce 360), 2026-02-16: "Mark Brohan | Feb 16, 2026" "Central to the strategy is the Agentic Commerce Protocol, or ACP, an open framework OpenAI co-developed with Stripe and released last year." (https://www.digitalcommerce360.com/2026/02/16/openai-expands-agentic-commerce-push/)
[^ref-32]: Ashley Capoot, OpenAI revamps shopping experience in ChatGPT after Instant Checkout (CNBC), 2026-03-24: "Published Tue, Mar 24 2026 1:32 PM EDT" "The update comes after OpenAI pivoted away from Instant Checkout, which allowed users to purchase select items from retailers inside the chatbot." "Analysts previously told CNBC that OpenAI underestimated how difficult the enablement of transactions would be. It struggled to onboard merchants, show accurate data about products and introduce multi-item carts or connect loyalty memberships." (https://www.cnbc.com/2026/03/24/openai-revamps-shopping-experience-in-chatgpt-after-instant-checkout.html)
[^ref-33]: PYMNTS, OpenAI Enhances Product Discovery With Visual Shopping (PYMNTS), 2026-03-24: "By PYMNTS | March 24, 2026" "ACP powers this shopping experience by enabling merchants to share product feeds and promotions, and by supporting multiple delivery paths so that merchants can participate with the systems they already use, including those from Salesforce and Stripe, according to the post." (https://www.pymnts.com/commerce/ecommerce/2026/openai-enhances-product-discovery-with-visual-shopping/)
[^ref-34]: Kate Blair and Todd Segal, ACP Joins Forces with A2A (LF AI & Data community blog), 2025-08-29: "ACP Joins Forces with A2A By Nora Anwar August 29, 2025" "IBM Research launched the Agent Communication Protocol (ACP) in March 2025 to power its BeeAI Platform" "Today, we're excited to share that ACP is officially merging with the A2A under the Linux Foundation (@thelinuxfoundation) umbrella." (https://lfaidata.foundation/communityblog/2025/08/29/acp-joins-forces-with-a2a-under-the-linux-foundations-lf-ai-data/)
[^ref-35]: Nathan Sobo, Bring Your Own Agent to Zed — Featuring Gemini CLI (Zed blog), 2025-08-27: "Nathan Sobo August 27th, 2025" "To make this possible, we created the Agent Client Protocol (ACP), and we've partnered with Google to integrate Gemini CLI as the initial reference implementation." (https://zed.dev/blog/bring-your-own-agent-to-zed)
[^ref-36]: AGNTCY, agntcy/acp-spec (Agent Connect Protocol Specification) README (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: "The Agent Connect Protocol defines a standard interface to invoke and configure remote agents over an API." (https://github.com/agntcy/acp-spec)
[^ref-37]: Davide Crapis, Bryan Lim, Tay Weixiong and Chooi Zuhwa, ERC-8183: Agentic Commerce (Ethereum Improvement Proposals), created 2026-02-25: "Created 2026-02-25" "This specification defines the Agentic Commerce Protocol: a job with escrowed budget, four states (Open → Funded → Submitted → Terminal), and an evaluator who alone may mark the job completed." (https://eips.ethereum.org/EIPS/eip-8183)
[^ref-38]: Google, Google Universal Commerce Protocol (UCP) Guide (Google for Developers), checked 2026-10-28: "UCP is fully compatible with protocols such as AP2, A2A, and MCP." (https://developers.google.com/merchant/ucp)
[^ref-39]: Google, Agentic Payment Protocol (AP2) v0.2 specification, docs/ap2/specification.md on main (text checked at the raw.githubusercontent.com copy), checked 2026-10-28: "AP2 operates as a security feature within a Commerce Protocol." "AP2 is designed explicitly to be compatible with the Universal Commerce Protocol (UCP) and integrates seamlessly." (https://github.com/google-agentic-commerce/AP2/blob/main/docs/ap2/specification.md)
[^ref-40]: OpenAI, ChatGPT merchants page (FAQ), checked 2026-10-29: "If you sell through Shopify or Etsy, your catalog is already integrated, and no additional setup or application is required." "Users can discover and evaluate products in ChatGPT, but purchases are completed on merchant-owned websites or apps." (https://chatgpt.com/merchants/)
[^ref-41]: OpenAI Help Center, ChatGPT — Release Notes (Wayback Machine snapshot of 2026-03-02, entry dated 2025-11-20), checked 2026-10-29: "Instant Checkout now rolling out to Shopify merchants" (https://web.archive.org/web/20260302064248/https://help.openai.com/en/articles/6825453-chatgpt-release-notes/)
[^ref-42]: Shopify, Millions of merchants can sell in AI chats (Shopify News), 2026-03-24: "March 24, 2026" "complete purchases via an in-app browser." "Crucially, merchants remain the merchant of record, retaining ownership of customer relationships and data." (https://www.shopify.com/news/agentic-commerce-momentum)
[^ref-43]: Stripe, Stripe helps power a new shopping experience in Microsoft Copilot (Stripe newsroom), 2026-01-08: "8 January 2026" "Copilot users in the United States will be able to buy products from Etsy businesses and retailers like Urban Outfitters and Anthropologie in the chat using checkout powered by Stripe." "To populate the checkout, Microsoft communicates with Stripe through an integration." "Stripe then connects with the seller via the Agentic Commerce Protocol, an open standard for agentic commerce codeveloped by Stripe." "After the buyer provides their payment credentials, Stripe issues a Shared Payment Token, a primitive that facilitates payments without exposing the buyer's credentials." (https://stripe.com/en-gr/newsroom/news/microsoft-copilot-and-stripe)
[^ref-44]: Adyen, Agentic Payments integration with ACP checkout flow (Adyen Docs), checked 2026-10-29: "Learn to delegate payments to Adyen from your agent platform in the ACP checkout flow." "The merchant uses the token to process the payment with Adyen." (https://docs.adyen.com/online-payments/agentic-commerce/agent-platform/agentic-payments-acp)
[^ref-45]: OpenAI, Agentic Commerce Protocol (OpenAI Developers), checked 2026-10-29: "enables ChatGPT to ingest structured catalog data, understand merchant inventory, and surface relevant products in context." (https://developers.openai.com/commerce)
[^ref-46]: Microsoft Advertising, Agentic Commerce solutions page, checked 2026-10-29: "You must have a MMC account and a UCP-compliant feed." (https://about.ads.microsoft.com/en/solutions/technology/agentic-commerce)