{
  "ok": true,
  "service": "api-calculator",
  "pairs": [
    "EURRUB",
    "USDKGS",
    "EURKGS",
    "USDTKRW",
    "USDTRUB"
  ],
  "updateIntervalMinutes": 30,
  "endpoints": {
    "allRates": "GET /rates",
    "singleRate": "GET /rates/:pair",
    "health": "GET /health",
    "manualRefresh": "POST /refresh"
  }
}