curl https://api.aioka.io/v1/signals/latest \
  -H "X-API-Key: aik_basic_your_key_here"

{
  "signals": [
    {
      "key": "BTC_RSI",
      "display_name": "BTC RSI (14)",
      "value": 42.3,
      "status": "LIVE",
      "last_updated": "2026-04-03T10:20:00Z"
    },
    {
      "key": "FEAR_GREED_INDEX",
      "display_name": "Fear & Greed Index",
      "value": 38.0,
      "status": "LIVE",
      "last_updated": "2026-04-03T10:00:00Z"
    }
  ],
  "total_signals": 27,
  "live_count": 24,
  "stale_count": 2,
  "dead_count": 1,
  "coverage_pct": 88.9,
  "macro_calendar": {
    "tier": "NONE",
    "event_name": "Core CPI m/m",
    "hours_until": 19.4,
    "is_active": false,
    "status": "CLEAR"
  },
  "timestamp": "2026-04-03T10:22:00Z",
  "cached": false,
  "cache_ttl_seconds": 30
}