Foreign exchange & crypto rates API (keyless access ended 2023).
Exchangerate.host API is a free Currency Exchange API that requires apiKey authentication, is served over HTTPS and has unconfirmed CORS support.
Access real-time, free exchange rates and forex data with our currency exchange rate API. Reliable, accurate, and perfect for conversion and forex exchange needs.
Details from exchangerate.host.

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The Exchangerate.host API is provided by ExchangeRate Host (exchangerate.host). Access real-time, free exchange rates and forex data with our currency exchange rate API. Reliable, accurate, and perfect for conversion and forex exchange needs.
Yes. The Exchangerate.host API is listed in the Currency Exchange category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
Yes. The Exchangerate.host API uses apiKey authentication, so you need to register for credentials before making requests.
CORS support for the Exchangerate.host API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The Exchangerate.host API is served over HTTPS, so it's safe to use in production.