The filtered ERC-8004 directory: which registered agents are actually alive, and which accept x402. Around a third of registrations on Base carry a compliant file and a declared service, and one in twelve of those declares x402 — this returns them, rather than screening eighty thousand addresses one at a time. GET /v1/registry publishes the split, free. 100 agents per page. Free alternative: GET /v1/registry. Trial: 3 free calls/wallet/24h — https://trust-agent.io/v1/trial.

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