Summary
In mid-to-late August 2026, Google's Agent2Agent (A2A) interoperability protocol became a hosted project of the Linux Foundation-directed Agentic AI Foundation (AAIF), placing it under neutral governance alongside Anthropic's Model Context Protocol. A2A standardizes how one agent discovers and delegates work to another via cryptographically signed agent cards; AAIF has grown from 49 to more than 250 members since its December 2025 launch.
What changed
A2A, Google's open standard for agent-to-agent discovery and communication, was contributed as a hosted AAIF project, so the two dominant agent protocols now sit under one neutral foundation: MCP for vertical agent-to-tool integration and A2A for horizontal agent-to-agent communication. A2A reached v1.0 in March 2026, adding multi-protocol bindings, version negotiation, multi-tenancy, and cryptographically signed agent cards; AAIF membership passed 250, with Platinum signatories including AWS, Anthropic, Block, Bloomberg, Cloudflare, Google, Microsoft, and OpenAI.
Why it matters
Neutral, foundation-hosted governance of A2A lowers the risk of vendor capture and encourages cross-provider agent interoperability, making it easier for enterprises to mix agents and tools without bespoke integrations. With A2A now beside MCP under AAIF, the market is settling on a two-protocol stack (tools plus agent-to-agent) rather than competing proprietary standards.
Evidence excerpt
A2A will become a hosted project of the Agentic AI Foundation, moving from the Linux Foundation's broader portfolio into its foundation focused specifically on agentic AI. The AAIF grew from 49 to more than 250 members, with Platinum signatories including AWS, Anthropic, Block, Bloomberg, Cloudflare, Google, Microsoft and OpenAI. A2A reached v1.0 in March 2026 with version negotiation, multi-tenancy, and cryptographically signed agent cards.