Best Currency Exchange APIs in 2026

The top 15 of 27 free Currency Exchange APIs, ranked by how easy they are to start with (API key, HTTPS, CORS), how reliable they are in our daily health checks, and what developers rate them. Currency-api takes the top spot.

Last tested Oct 24, 2026 · Rankings update daily

1
Currency-api
Online · 712 ms
Free Currency Exchange Rates API with 150+ Currencies & No Rate Limits.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
2
Daleelak API
Online · 512 ms
Egyptian bank and dealer exchange rates, gold and silver prices.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
3
Fulusly API
Online · 486 ms
Exchange rates for 144 currencies with daily history back to the 1990s, English and Arabic.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
4
National Bank of Poland API
Online · 492 ms
A collection of currency exchange rates (data in XML and JSON).
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
5
paralelo.bo API
Online · 524 ms
Bolivia parallel-market USD/BOB exchange rate, aggregated from P2P sources every 60s.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
6
ExchangeRate-API
Online · 247 ms
Accurate & reliable Exchange Rates API trusted by tens of thousands of developers since 2010.
- Fast: 247 ms response
- Callable from the browser (CORS)
- HTTPS
apiKeyHTTPSCORS
7
Frankfurter API
Online · 1501 ms
Exchange rates, currency conversion and time series.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
8
Economia.Awesome API
Online · 518 ms
Portuguese free currency prices and conversion with no rate limits.
- No API key needed
- HTTPS
No authHTTPSCORS ?
9
Bank of Russia API
Online · 819 ms
Exchange rates and currency conversion.
- No API key needed
- HTTPS
No authHTTPSCORS ?
10
CurrencyFreaks API
Online · 533 ms
Provides current and historical currency exchange rates with free plan 1K requests/month.
- Callable from the browser (CORS)
- HTTPS
apiKeyHTTPSCORS
11
Exchangeratesapi.io API
Online · 908 ms
Exchange rates with currency conversion.
- Callable from the browser (CORS)
- HTTPS
apiKeyHTTPSCORS
12
Nerkhsanj API
Online · 1056 ms
Iran free-market USD, EUR, CNY, gold and coin rates in toman, live and daily archive since 2010.
- No API key needed
- HTTPS
No authHTTPSNo CORS
13C
CurrencyBeacon API
Online · 947 ms
Real-time and historical currency exchange rates with free tier.
- Callable from the browser (CORS)
- HTTPS
apiKeyHTTPSCORS
14
Czech National Bank API
Online · 482 ms
A collection of exchange rates.
- No API key needed
- HTTPS
No authHTTPSCORS ?
15
Exchangerate.dev API
Online · 1240 ms
Live & historical FX, 168 pairs back to 1999, Frankfurter-compatible, free 10k/mo.
- No API key needed
- HTTPS
No authHTTPSCORS ?

Currency Exchange APIs compared

Top Currency Exchange APIs compared
API	API key	HTTPS	CORS	Uptime	Response	Rating
Currency-api	No	Yes	Yes	Up	712 ms	Not rated
Daleelak	No	Yes	Yes	Up	512 ms	Not rated
Fulusly	No	Yes	Yes	Up	486 ms	Not rated
National Bank of Poland	No	Yes	Yes	Up	492 ms	Not rated
paralelo.bo	No	Yes	Yes	Up	524 ms	Not rated
ExchangeRate-API	Required	Yes	Yes	Up	247 ms	Not rated
Frankfurter	No	Yes	Yes	Up	1501 ms	Not rated
Economia.Awesome	No	Yes	Unknown	Up	518 ms	Not rated
Bank of Russia	No	Yes	Unknown	Up	819 ms	Not rated
CurrencyFreaks	Required	Yes	Yes	Up	533 ms	Not rated

More Currency Exchange APIs

Best Currency Exchange API FAQ

What is the best free Currency Exchange API in 2026?

Based on access, reliability and developer ratings, the top free Currency Exchange APIs right now are Currency-api, Daleelak API and Fulusly API. Currency-api ranks first. Rankings update daily from health checks of all 27 Currency Exchange APIs in the directory.

What is the best Currency Exchange API without an API key?

Currency-api, Daleelak API and Fulusly API need no API key, so you can call them without signing up. 15 of the 27 ranked Currency Exchange APIs are keyless.

Which Currency Exchange API works from the browser?

Currency-api, Daleelak API and Fulusly API support CORS over HTTPS, so front-end JavaScript can call them directly without a proxy.

How are these APIs ranked?

Each API gets a score from: no API key (+), HTTPS (+), CORS support (+), 30-day uptime and response time from our daily health checks, and ratings from developers on this site. APIs that failed three checks in a row are left out until they recover.