Frankfurter Currency Exchange Rates

Real-time and historical foreign exchange rates published by the European Central Bank (ECB). The Frankfurter API provides daily reference rates for 30+ currencies including USD, GBP, JPY, CHF, CAD, AUD, and many more, with historical data going back to January 4, 1999.

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Frankfurter Currency Exchange Rates

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What you can query

You can retrieve today's rates for any base currency (latest endpoint), look up rates for any specific historical date ({date} endpoint), and fetch daily time series across a date range with optional currency conversion ({start}..{end} endpoint). Rates are updated every working day around 16:00 CET. The API is free, open-source, requires no authentication, and has no usage limits.

What you can do

  • Convert amounts between international currencies at current or historical rates
  • Track how exchange rates between two currencies have changed over time
  • Compare exchange rates across multiple currencies for a specific date
  • Build financial models and forecasts using historical forex data
  • Analyze currency trends and volatility for business planning
  • Calculate cost differences for international purchasing or travel

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