Atlas / Distribution, hosting and standards / A2A · AGENTS.md · ACP
A2A · AGENTS.md · ACP
AI Market Atlas · by Pro Pluribus
Open standards
Standards for how agents talk to each other, read project instructions and plug into editors.
What it offers
Main offerings
- A2A
- Agent-to-agent protocol (Google); joined the Agentic AI Foundation in August.
- AGENTS.md
- Project instruction file (OpenAI); a founding Agentic AI Foundation project.
- ACP
- Agent Client Protocol (Zed): run any agent inside any editor.
- Personal Agent Protocol
- Proposed by Sierra and Meta (Oct): how consumers' personal agents deal with businesses.
Recent news
- Sierra and Meta launch the Personal Agent ProtocolA proposed open standard for consumer agents dealing with businesses, a new layer beside MCP and A2A.Unite.AI ↗
- A2A joins the Agentic AI Foundation as a Growth Stage projectBrings the main agent protocols (A2A, MCP, AGENTS.md) under one Linux Foundation bodyA2A Protocol ↗
- AI agents inch toward interoperability as A2A moves to AAIFGoogle's protocol joins the neutral foundation, now with more than 250 membersAxios ↗
- x402 Foundation launches to standardize payments by AI agentsVisa, Mastercard, Stripe, Google, AWS, Cloudflare and Coinbase back one open standard for agent payments.x402.org ↗
- Zed and JetBrains launch the ACP agent registryRegister an agent once to reach every ACP editor; now supported by JetBrains, Google and GitHubZed ↗
Compiled from public sources by Pro Pluribus; updated 16 Oct 2026. General information, not advice. Company names and logos belong to their owners and are used to identify them, without affiliation or endorsement. Terms