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The A2A Agent Card explained: discovery, supported interfaces, and signature verification

This story is from 2026-10-05. It is preserved in the archive; the latest stories are on the live feed.

Before two agents can collaborate, the caller has to answer three questions without a private introduction: where the agent is, what it can do, and how to talk to it. In the Agent2Agent protocol the answer to all three is one public document, the Agent Card , served at a well-known URL. The card is…

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  1. 2026-10-05 21:39 · DEV Community — AI
    The A2A Agent Card explained: discovery, supported interfaces, and signature verification

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