{
  "url": "https://kronossignals.com/api/v1/funding-arb/btc",
  "grade": "?",
  "score": null,
  "status": "insufficient_data",
  "flags": [],
  "first_seen": 1790205598,
  "last_probe": {
    "ts": 1792773066,
    "status": 402,
    "latency_ms": 147,
    "errors": []
  }
}