AI BriefingGoogle's A2A Protocol Joins Agentic AI Foundation Alongside MCP
·2026.10.22 13:37
Key point
The Linux Foundation-backed body now hosts A2A next to MCP, with the protocol v1.0 adding multi-protocol bindings and signed agent cards.
Details
- A2A, the open protocol for cross-vendor agent communication, became a hosted project at the Agentic AI Foundation (AAIF) on Aug 17, 2026.
- AAIF, announced Dec 9, 2025, grew from under 40 to 250+ members and now hosts A2A, MCP, goose, AGENTS.md, and agentgateway.
- A2A v1.0, released March 2026, introduced multi-protocol bindings, version negotiation, multi-tenancy, and signed agent cards.
- The protocol is Apache 2.0 licensed with SDKs for Python, Go, Java, JS, .NET, and Rust, and a steering committee including AWS, Cisco, Google, IBM Research, Microsoft, Salesforce, SAP, and ServiceNow.
- A2A is positioned as complementary to MCP (agent-to-agent vs. agent-to-tool) and does not standardize enterprise authorization, leaving access control to individual companies.
- Adoption metrics, such as 150+ supporting organizations, are reported by the foundation and vendors rather than independently measured.
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