CURRENCY_CONVERTER
I have used Frankfurter API for the data about currency.
Frankfurter BUILD
Frankfurter is a free and open-source currency data API that tracks reference exchange rates published by the European Central Bank.
api.frankfurter.app hosts a public instance of the API.
Getting Get the latest exchange rates.
https://api.frankfurter.app/latest Get rates for a past date.
https://api.frankfurter.app/2000-01-03 Get rates for a period.
https://api.frankfurter.app/2010-01-01..2010-01-31 For more examples, read the docs.
Deployment
You can self-host Frankfurter with Docker.
docker run -d -p 8080:8080
-e "DATABASE_URL=<postgres_url>"
--name frankfurter hakanensari/frankfurter
Miscellaneous
Frankfurter was known as Fixer between 2012 and 2018. After selling the original domain, I relaunched under this name.