Verified70% confidenceFactTime unknown
An 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.
4
Sources
70%
Confidence
Long-term
Relevance
6/1/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedA2A achieves self-declaration and discovery of agent capabilities through the "Agent Card" mechanism, where each agent can expose a standardized .well-known/agent.json endpoint.76% 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% similarUnverifiedA2A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71% similarUnverifiedA2A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69% similarUnverifiedAgent Core has built-in harness capabilities, allowing developers to deploy an agent by simply providing a JSON configuration specifying the model and system prompt, without writing any agent code.69% similar
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