curl -X POST '/screener/check' \
  -H 'Content-Type: application/json' \
  -d '{
    "address": "0x9F8b3A2c1E4D7F6B5A4C3D2E1F0A9B8C7D6E5F4"
  }'

{
  "success": true,
  "data": {
    "address": "0x9F8b3A2c1E4D7F6B5A4C3D2E1F0A9B8C7D6E5F4",
    "risk_level": "low",
    "flagged": false,
    "checks": {
      "sanctions": false,
      "fraud": false,
      "darknet": false,
      "mixer": false
    },
    "checked_at": "2026-04-01T12:00:00Z"
  }
}