Changelog and timeline
The milestones that shaped the agentic commerce standards, newest first. Each entry links to its primary source.
The ACP specification adds cart, feed, orders, authentication and MCP support.
Primary source →Anthropic donates MCP to the Agentic AI Foundation under the Linux Foundation, co-founded with Block and OpenAI.
Primary source →Instant Checkout launches in ChatGPT, powered by the Agentic Commerce Protocol (Apache 2.0), starting with Etsy sellers.
Primary source →Google announces the Agent Payments Protocol with 60+ organizations, designed as an extension of A2A and MCP.
Primary source →Coinbase launches x402, native stablecoin payments over HTTP via the 402 status code, with AWS, Anthropic, Circle and NEAR.
Primary source →Anthropic open-sources the Model Context Protocol, the context layer for connecting agents to tools and data.
Primary source →Verified on 2026-05-31.