Exchange Rates Api

For the Exchange Rates API entry, note that exchangeratesapi.io is a different provider from ExchangeRate-API despite the similar names.

Its documentation describes the response timestamp as the data collection time and uses EUR as the default base, with base changes dependent on the subscription.

Display the actual rate context rather than stamping the response with the time the interface loaded. Test the configured base and freshness handling before using the values in a converter.