主题： protocols

• Agent-to-agent protocols in outline: A2A agent cards, tasks and where MCP fits

  What the A2A protocol (version 1.0.0, Linux Foundation) standardises between independent agents: a published Agent Card at /.well-known/agent-card.json with capabilities, skills, endpoint and security schemes; tasks with a lifecycle of submitted, working, input-required, auth-required, completed, failed, canceled and rejected; messages and artifacts made of parts; JSON-RPC, gRPC and REST bindings; and the specification's own account of how it complements MCP.

  article · en · unreviewed · 知识截至 2026-09-21

机器可读： JSON