{"ok":true,"result":{"ok":false,"error":"dob required (YYYY-MM-DD)"},"serviceId":"x402-age","free":true,"_register":"Get 500 free credits (no KYC): POST /api/v1/register-simple {name}","_trial":{"remaining":3,"max":15,"warning":"Only 3 free trials left","register":"POST /api/v1/register-simple {name} — 500 free credits, no KYC, auto-wallet"}}