| 1Forge | Real-time forex and currency market data with exchange rate updates | apiKey | ✓ | ? | |
| Amdoren | Free currency API supporting over 150 global currencies | apiKey | ✓ | ? | |
| apilayer fixer.io | Reliable exchange rate and currency conversion API | apiKey | ✗ | ? | |
| Bank of Russia | Official exchange rates and currency conversion data from the Bank of Russia | No | ✓ | ? | |
| Currency-api | Free exchange rate API with 150+ currencies and no request limits | No | ✓ | ✓ | |
| CurrencyFreaks | Current and historical exchange rates with free plan for 1K requests per month | apiKey | ✓ | ✓ | |
| Currencylayer | Real-time exchange rates and currency conversion data API | apiKey | ✓ | ? | |
| CurrencyScoop | Real-time and historical foreign exchange rates in JSON format | apiKey | ✓ | ✓ | |
| Czech National Bank | Official exchange rate data provided by the Czech National Bank | No | ✓ | ? | |
| Economia.Awesome | Portuguese open API for currency prices and conversion with no limits | No | ✓ | ? | |
| ExchangeRate-API | Free and easy-to-use currency conversion API | apiKey | ✓ | ✓ | |
| Exchangerate.host | Free API for foreign exchange and cryptocurrency rates | No | ✓ | ? | |
| Exchangeratesapi.io | Exchange rate API for currency conversion and financial data | apiKey | ✓ | ✓ | |
| Frankfurter | Open-source exchange rate and currency conversion API with time series support | No | ✓ | ✓ | |
| FreeForexAPI | Real-time foreign exchange rate data for major currency pairs | No | ✓ | ✗ | |
| National Bank of Poland | Official exchange rate data from the National Bank of Poland (XML and JSON) | No | ✓ | ✓ | |
| VATComply.com | Exchange rates, geolocation, and VAT number validation API | No | ✓ | ✓ | |