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Listing does not require task lookup; implement the method matching your advertised version to confirm A2A"},"x402_price_check":{"checked_at":"2026-10-11T10:34:02.074907+00:00","state":"invalid_402","http_status":402,"resource_url":"https://email-dns-preflight-x402.copper-crate.workers.dev/v1/email/preflight?email=alice%40example.com","requirements":[],"declared":{"asset":"USDC","network":"eip155:8453"},"reason":"HTTP 402 did not contain supported structured payment terms","risk_flags":[]},"events":[],"relationships":[],"verification":{"agent_card_url":"https://email-dns-preflight-x402.copper-crate.workers.dev/.well-known/agent-card.json","last_successful_card_check":"2026-10-11T18:07:45.405384+00:00","latest_card_check":{"checked_at":"2026-10-11T18:07:45.405384+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},"signature_status":"unsigned","signature_checked_at":"2026-10-11T18:07:45.405384+00:00","task_endpoint_tested":true,"task_execution_tested":false,"endpoint_tls_checked_at":"2026-10-11T18:07:45.405384+00:00","endpoint_tls_reachable":true,"protocol_check_state":"jsonrpc_no_task_lookup","protocol_checked_at":"2026-10-11T15:49:21.794236+00:00","provider_identity_verified":false,"domain_claimed_at":null,"domain_proof_checked_at":null}}