If you’re looking for a free and straightforward API for currency conversion, you can try Imhotep Exchange Rate API. It’s completely free and offers cached exchange rates updated every 3 hours, ensuring you get reliable data without exceeding limits. Example Usage:

To fetch the latest rates, make a GET request to:

https://imhotepexchangeratesapi.pythonanywhere.com/latest_rates/YOUR_API_KEY/USD

Example Response:

{ "meta": { "base_currency": "USD", "last_updated_at": "2025-01-10T00:00:00Z" }, "data": { "EUR": 0.85, "GBP": 0.74, "JPY": 110.25 } }

It’s free, easy to use, and works well for most mobile and web development use cases. You can learn more and sign up here: Imhotep Exchange Rate API.