{"service":"World Cup 2026 Upset Radar (ASP)","paid_endpoint":"/report","price":"$1","network":"eip155:196","asset":"USD0 (USDT on X Layer)","protocol":"x402 exact scheme (OKX Agent Payments Protocol, v2)","how_to_pay":"GET /report with no payment -> 402 challenge; pay via x402, resend with PAYMENT-SIGNATURE header"}