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Check the historical data availability range for currency rates. Returns the earliest available date for a given currency pair.
Returns a map showing the date range for which historical data is available for each supported currency.
Pass your API key as the apiKey parameter in every request.
This is version v1.0 of the API.
A successful request returns a 200 OK response with the availability periods for all currencies.
Map of all currency codes to their historical data availability range.