curl -X POST '/v1/agent/x402-fetch' \
  -H 'Authorization: Bearer yac_connector_api_key' \
  -H 'Content-Type: application/json' \
  -d '{
    "wallet_id": "aw_01abc123",
    "url": "https://api.example.com/premium-data",
    "method": "GET"
  }'

{
  "success": true,
  "data": {
    "status": 200,
    "paid": true,
    "payment": {
      "amount_usd": 0.01,
      "asset": "USDC",
      "network": "base",
      "pay_to": "0x9F8b3A2c1E4D7F6B5A4C3D2E1F0A9B8C7D6E5F4"
    },
    "body": {
      "premium_data": "..."
    }
  }
}