Currency Historical Data Limits API

{
  "availabilityPeriod": {
    "USD": "1984-11-28 to 2026-06-18",
    "EUR": "1998-12-31 to 2026-06-18",
    "PKR": "1985-10-02 to 2026-06-18",
    "BTC": "2013-01-07 to 2026-06-18",
    "XAU": "1984-11-29 to 2026-06-18"
  }
}