Unverified90% confidenceFactTime unknown
A2A协议通过Agent Card让每个Agent暴露能力清单，实现Agent之间零代码、零API契约的即插即用连接
1
Sources
90%
Confidence
Long-term
Relevance
6/1/2026
First Seen
Sources
Google Agent Platform全解析：ADK、MCP、A2A构建生产级AI Agent
bilibiliGoogle中国
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UnverifiedA2A协议基于HTTP/SSE构建，引入了Agent Card概念，每个Agent发布描述自身能力的元数据卡片73% similarUnverifiedIn the A2A protocol, each agent publishes an Agent Card at the fixed server path `/.well-known/agent`, containing information such as Name, Skills, and Auth.72% similarVerifiedA2A introduces the concept of an Agent Card, where each Agent publishes a structured capability declaration document describing the task types it can handle, input/output formats, and authentication requirements.72% similarUnverifiedAn Agent Card is a standardized business card for agents in the A2A protocol, declaring capabilities, input/output schemas, authentication methods, and other information in JSON format, without exposing the internal model and tool implementations.69% similarUnverifiedThe core design principle of the A2A protocol is that agents collaborate based on declared capabilities rather than inspecting each other's internal implementations.65% similar
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