About Frankfurter
Frankfurter is a free exchange rate API for 219 currencies, with historical data going back to 1948. It is open source, so you can use the public service or run your own copy.
What it does
The API returns exchange rates sourced from 108 central banks and official sources. You can change the base currency, limit results to chosen target currencies, look up rates for a single past date or fetch a time series over a period. The data also covers 39 other assets. Rates update daily.
Key features
- Rates for 219 currencies and 39 other assets
- Change the base currency and filter target currencies
- Look up rates for a past date
- Time series of rates over a period
- Self-hostable open source project
Who it's for
Developers building payment, travel or accounting tools, analysts who need historical rates and anyone who wants a currency converter without an API key.
Pricing and good to know
The public API is free and does not need an API key. The source is on GitHub under the MIT license. Rates update daily, so they are not real-time, and the data is best suited to reporting, conversion and analysis rather than live trading.
Highlights
- Rates for 219 currencies and 39 other assets
- Change the base currency and filter target currencies
- Look up rates for a past date
- Time series of rates over a period
- Self-hostable open source project
