{"product":"Agentic Security Shield","price":{"amount":19,"currency":"USD","type":"one-time"},"payment_methods":{"x402":{"protocol":"HTTP 402 Payment Required","network":"Base (Chain ID 8453)","token":"USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913)","amount":"19.00 USDC","recipient":"0x046fcceea93b1b5879725a2a4297b0dd5b5ae950","flow":["1. GET /purchase → receive 402 with payment details","2. Send 19 USDC to recipient on Base","3. POST /purchase with x-payment-token: <tx_hash>","4. Receive download token + all skill files"]}},"notes":"v1.0 accepts only x402 (USDC on Base) for autonomous agent-to-agent commerce. Human-facing card payments are sold separately via Gumroad."}