This add-on will allow you to get currency exchange rates right from within your Google Sheets™.

It extends Google Sheets™ with custom formulas that fetch information from "Narodowy Bank Polski".

Following features are available:
➤ Get latest currency exchange rate available
➤ Get currency exchange rate for given date
➤ Get latest available exchange rate before specific date

Additionally, formulas try to return useful error messages in error scenarios 
(like getting currency exchange rate for the date in future).

I hope you will find this extension useful. In case of any questions please contact me through email.

Have a great day!