来源: a2a-registry/browse Agent Card: https://dynamicfeed.ai/a2a A2A: https://dynamicfeed.ai/a2a The verifiable live-data agent. Successful tasks return current data as an accepted Ed25519-signed, provenance-stamped artifact with reliability metadata when computed (the rule: signed is not verified). Keyless fair-use. A neutral witness, never the money path.