Real-time and historical currency exchange rates with free tier.
CurrencyBeacon API is a free Currency Exchange API that requires apiKey authentication, is served over HTTPS and supports CORS, so it can be called from the browser.
CurrencyBeacon is a developer-friendly currency rates REST API with code samples, SDK-ready JSON responses, and an MCP server for AI agents.
Details from currencybeacon.com.

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Provides current and historical currency exchange rates with free plan 1K requests/month
Real-time and historical currency rates JSON API
Free utility APIs: timezone, forex rates, crypto prices, page metadata
The CurrencyBeacon API is provided by CurrencyBeacon (currencybeacon.com). CurrencyBeacon is a developer-friendly currency rates REST API with code samples, SDK-ready JSON responses, and an MCP server for AI agents.
Yes. The CurrencyBeacon 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 CurrencyBeacon API uses apiKey authentication, so you need to register for credentials before making requests.
Yes. The CurrencyBeacon API supports CORS, so front-end JavaScript can call it directly.
Yes. The CurrencyBeacon API is served over HTTPS, so it's safe to use in production.