Free APIs
Free Currency exchange APIs
| Free tier | Docs | ||
|---|---|---|---|
Exchange rates published by the European Central Bank
Catch: ECB reference rates only, published on working days | Free, no key | No key | docs |
Currency conversion rates for 160+ currencies
Catch: Daily updates on free plan; paid plans update hourly | Free plan; rates update once every 24 hours | API key | docs |
Hourly forex rates, historical and conversion
Catch: Free plan: USD base only, hourly updates | Free plan: 1,000 requests/month | API key | docs |
| Free plan: 100 API calls/month, hourly updates | API key | docs | |
Live and historical currency exchange rates
Catch: Free plan: 10 requests/minute | Free plan: 300 requests/month | API key | docs |
Static JSON exchange rates for 200+ currencies and crypto
Catch: Community project served via CDN; no SLA | Free, no key, no rate limits | No key | docs |
FAQ
What is the best free currency exchange API?+
Frankfurter, ExchangeRate-API, Open Exchange Rates are good places to start. Compare the free tiers and catches in the table; they differ mostly in limits and whether commercial use is allowed.
Is there a currency exchange API without an API key?+
Yes: Frankfurter, Currency API (fawazahmed0) work without a key.
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