Where do services for providing the exchange rate through api get information about currencies?

Question

API

Could you tell me where the services for providing the exchange rate through api get information about currencies?. I will be grateful, thanks.

Answer 1

You can, say, install Fiddler and see where your traffic goes.

Answer 2

Keep
www.cbr.ru/development/sxml
There seems to be arj archives with dates :)
Don't ask, hard childhood, in one of the banks

Answer 3

you can get from here https://finance-calculators.ru/konverter-valyut-1.php
exchange rates of all currencies from the CBE