Historical Exchange Rates APIs
Historical exchange rate APIs vary in how far back they go and what they charge. Frankfurter returns central-bank rates with no key, and the National Bank of Poland publishes its own history back to 2002 for free. CurrencyBeacon reaches back to 1996 on a freemium plan, while Exchangerate.dev serves daily ECB fixes from 1999.
| API | Pricing | Auth | Format | Free tier | Status |
|---|---|---|---|---|---|
CurrencyapiLive and historical exchange rates for 170+ currencies and crypto, updated regularly. Finance & Commerce › Currency & Exchange Rates | Freemium | API key | JSON | <100/day | Live |
CurrencyBeaconReal-time and historical foreign exchange rates plus currency conversion, back to 1996. Finance & Commerce › Currency & Exchange Rates | Freemium | API key | JSON | 100–1k/day | Live |
CurrencyFreaksExchange rates for 166 fiat currencies, 861 cryptocurrencies and precious metals, with conversion and history. Finance & Commerce › Currency & Exchange Rates | Freemium | API key | JSON | <100/day | Live |
CurrencylayerReal-time and historical exchange rates for 174 currencies, with conversion and time-frame data. Finance & Commerce › Currency & Exchange Rates | Freemium | API key | JSON | <100/day | Live |
CurrencyScoopLive and historical foreign-exchange rates with conversion, timeseries and fluctuation endpoints. Finance & Commerce › Currency & Exchange Rates | Freemium | API key | JSON | 100–1k/day | Deprecated |
Exchangerate.devLive and historical FX rates for 31 currencies, with daily ECB fixes back to 1999. Finance & Commerce › Currency & Exchange Rates | Freemium | API key | JSON | 100–1k/day | Live |
Exchangerate.hostReal-time and historical foreign exchange and crypto rates across roughly 168 currencies. Finance & Commerce › Currency & Exchange Rates | Freemium | API key | JSON | <100/day | Live |
Exchangeratesapi.ioReal-time and historical exchange rates for 174 currencies, plus conversion and fluctuation data. Finance & Commerce › Currency & Exchange Rates | Freemium | API key | JSON | 100–1k/day | Live |
FixerLive and historical foreign exchange rates for 170 currencies, plus a conversion endpoint. Finance & Commerce › Currency & Exchange Rates | Freemium | API key | JSON | — | Live |
FrankfurterCurrent and historical exchange rates for 206 currencies from central banks, no key required. Finance & Commerce › Currency & Exchange Rates | Free | None | JSON | Unlimited | Live |
FxFeed.ioLatest, historical and time-series FX rates and conversion for 160+ currencies since 1999. Finance & Commerce › Currency & Exchange Rates | Freemium | API key | JSON | <100/day | Live |
FXpeekDaily and historical rates for major and long-tail currencies, plus USDT/USDC reference rates, no key. Finance & Commerce › Currency & Exchange Rates | Freemium | None | JSON | Unlimited | Live |
FxRatesAPIReal-time and historical currency exchange rates and conversion, usable without an API key. Finance & Commerce › Currency & Exchange Rates | API key | JSON | — | Live | |
National Bank of PolandPoland's central bank exchange rates and gold prices, current and historic since 2002. Finance & Commerce › Currency & Exchange Rates | Free | None | JSON | Unlimited | Live |
UniRateAPIReal-time and historical exchange rates for 170+ fiat currencies, 500+ cryptocurrencies and precious metals. Finance & Commerce › Currency & Exchange Rates | Freemium | API key | JSON | 100–1k/day | Live |
xChangeApiLive and historical foreign exchange rates with OHLC data and currency conversion, via REST and WebSocket. Finance & Commerce › Currency & Exchange Rates | API key | JSON | — | Live |
CurrencyapiFreemiumLive
Live and historical exchange rates for 170+ currencies and crypto, updated regularly.
API key · JSON
<100/day
OpenAPI spec · llms.txt
CurrencyBeaconFreemiumLive
Real-time and historical foreign exchange rates plus currency conversion, back to 1996.
API key · JSON
100–1k/day
no machine-readable spec
CurrencyFreaksFreemiumLive
Exchange rates for 166 fiat currencies, 861 cryptocurrencies and precious metals, with conversion and history.
API key · JSON
<100/day
no machine-readable spec
CurrencylayerFreemiumLive
Real-time and historical exchange rates for 174 currencies, with conversion and time-frame data.
API key · JSON
<100/day
OpenAPI spec
CurrencyScoopFreemiumDeprecated
Live and historical foreign-exchange rates with conversion, timeseries and fluctuation endpoints.
API key · JSON
100–1k/day
no machine-readable spec
Exchangerate.devFreemiumLive
Live and historical FX rates for 31 currencies, with daily ECB fixes back to 1999.
API key · JSON
100–1k/day
MCP server · llms.txt
Exchangerate.hostFreemiumLive
Real-time and historical foreign exchange and crypto rates across roughly 168 currencies.
API key · JSON
<100/day
llms.txt
Exchangeratesapi.ioFreemiumLive
Real-time and historical exchange rates for 174 currencies, plus conversion and fluctuation data.
API key · JSON
100–1k/day
OpenAPI spec
FixerFreemiumLive
Live and historical foreign exchange rates for 170 currencies, plus a conversion endpoint.
API key · JSON
—
llms.txt
FrankfurterFreeLive
Current and historical exchange rates for 206 currencies from central banks, no key required.
None · JSON
Unlimited
OpenAPI spec · llms.txt
FxFeed.ioFreemiumLive
Latest, historical and time-series FX rates and conversion for 160+ currencies since 1999.
API key · JSON
<100/day
OpenAPI spec · llms.txt
FXpeekFreemiumLive
Daily and historical rates for major and long-tail currencies, plus USDT/USDC reference rates, no key.
None · JSON
Unlimited
OpenAPI spec · llms.txt
FxRatesAPILive
Real-time and historical currency exchange rates and conversion, usable without an API key.
API key · JSON
—
no machine-readable spec
National Bank of PolandFreeLive
Poland's central bank exchange rates and gold prices, current and historic since 2002.
None · JSON
Unlimited
no machine-readable spec
UniRateAPIFreemiumLive
Real-time and historical exchange rates for 170+ fiat currencies, 500+ cryptocurrencies and precious metals.
API key · JSON
100–1k/day
OpenAPI spec
xChangeApiLive
Live and historical foreign exchange rates with OHLC data and currency conversion, via REST and WebSocket.
API key · JSON
—
no machine-readable spec
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Choosing a Historical Exchange Rates API
Is there a free Historical Exchange Rates API?
Yes. Frankfurter and National Bank of Poland are free to use, and CurrencyBeacon, Fixer, Currencyapi, CurrencyFreaks, Currencylayer and 6 others have a free tier alongside paid plans.
Which Historical Exchange Rates APIs work without an API key?
Frankfurter, FXpeek and National Bank of Poland need no key or sign-up, so you can try them with a plain request.
Can I call a Historical Exchange Rates API from front-end JavaScript?
Frankfurter and National Bank of Poland allow cross-origin requests and need no key, so they work straight from the browser. For the others, call them from your server so your key stays private.
Can I use Historical Exchange Rates APIs in a commercial project?
CurrencyBeacon, FxFeed.io and UniRateAPI permit commercial use. Fixer, Currencyapi, Currencylayer, Exchangerate.dev and Exchangeratesapi.io restrict it, for example to non-commercial or attributed use, so read the terms first.
Which Historical Exchange Rates APIs work with AI agents?
Exchangerate.dev has an MCP server, so an AI agent can call it directly. Frankfurter, Currencyapi, Currencylayer, Exchangeratesapi.io, FxFeed.io and 2 others publish an OpenAPI spec for generating clients and tools.
Broader: Currency & Exchange Rates APIs · Finance & Commerce APIs
More in Currency & Exchange Rates: Currency Converter APIs · Forex APIs