The A2A (Agent-to-Agent) Protocol: How Agents Delegate to Each Other, and Where Payments Plug In
- whackur
- Blockchain
- August 27, 2026
A2A (Agent2Agent) standardizes how to delegate work to an independently operated agent and receive progress and results. A client reads an Agent Card for capabilities, endpoints and authentication requirements, then tracks longer work as a Task. MCP connects each agent to tools and data; separate protocols such as AP2 and x402 handle purchase authorization and payment settlement. Collaborating over A2A requires neither a blockchain nor a wallet. A2A specification, division of responsibilities with MCP
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