Unverified90% confidenceFactTime unknown
A2A协议的传输层使用JSON-RPC 2.0走HTTPS，长任务用Server-Sent Events做流式更新或Webhook做异步通知，版本0.3还加了gRPC支持
1
Sources
90%
Confidence
Long-term
Relevance
6/1/2026
First Seen
Sources
Related Entities
Related Claims
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