A2A Protocol Interoperability

Parent: AI Agent Ecosystems · researched 2026-05-25· 0 sources · 2 concepts · skill a2a-interop

Reference for the Agent-to-Agent protocol and cross-framework agent communication.

A2A Protocol & Agent Interoperability

Reference for the Agent-to-Agent protocol and cross-framework agent communication. [source]

When to use this skill

Activate when the user: [source]
asks about the A2A protocol or agent-to-agent communication [source]
wants to publish an Agent Card at .well-known/agent.json [source]
needs to implement A2A task lifecycle handling [source]
asks how A2A and MCP work together [source]
wants cross-framework agent interop (LangGraph <-> CrewAI <-> ADK <-> Claude SDK) [source]
asks about AAIF, ACP, ANP, or agent protocol governance [source]
needs to design a multi-vendor agent system [source]

Core JSON-RPC operations

Required header: A2A-Version: Major.Minor in all requests. [source]

Governance (2026)

AAIF (Agentic AI Foundation, Linux Foundation): neutral governance body for A2A and MCP. [source]
ACP: merged into A2A under AAIF. [source]
ANP: emerging decentralized peer-to-peer discovery layer above A2A. [source]

References

A2A Protocol Specification [source]
A2A GitHub Repository [source]

Children

Agent Cards (frontier)
7-State Task Lifecycle (frontier)
JSON-RPC 2.0 Transport (frontier)
Cross-Framework Agent Bridging (frontier)
AAIF and Protocol Governance (frontier)

Frontier under this node: 7-State Task Lifecycle, AAIF and Protocol Governance, Agent Cards, Cross-Framework Agent Bridging, JSON-RPC 2.0 Transport

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