Free Currency Exchange APIs with no API key

15 Currency Exchange APIs that need no API key, account or credit card. 8 of them also allow CORS, so you can call them straight from browser JavaScript. Listed by uptime and ease of use.

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
Frankfurter API
Online · 1501 ms
Exchange rates, currency conversion and time series.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
7
Economia.Awesome API
Online · 518 ms
Portuguese free currency prices and conversion with no rate limits.
- No API key needed
- HTTPS
No authHTTPSCORS ?
8
Bank of Russia API
Online · 819 ms
Exchange rates and currency conversion.
- No API key needed
- HTTPS
No authHTTPSCORS ?
9
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
10
Czech National Bank API
Online · 482 ms
A collection of exchange rates.
- No API key needed
- HTTPS
No authHTTPSCORS ?
11
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 ?
12A
api-mint API
Last check failed
Free utility APIs: timezone, forex rates, crypto prices, page metadata.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
13
VATComply.com API
Last check failed
Exchange rates, geolocation and VAT number validation.
- No API key needed
- Callable from the browser (CORS)
- HTTPS
No authHTTPSCORS
14
FXpeek API
Last check failed
Source-linked historical reference exchange rates with CSV, JSON and an MCP server.
- No API key needed
- HTTPS
No authHTTPSCORS ?
15F
FreeForexAPI
Last check failed
Real-time foreign exchange rates for major currency pairs.
- No API key needed
- HTTPS
No authHTTPSNo CORS

Keyless Currency Exchange APIs compared

Currency Exchange APIs with no API key
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
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
Nerkhsanj	No	Yes	No	Up	1056 ms	Not rated
Czech National Bank	No	Yes	Unknown	Up	482 ms	Not rated
Exchangerate.dev	No	Yes	Unknown	Up	1240 ms	Not rated
api-mint	No	Yes	Yes	Down	–	Not rated
VATComply.com	No	Yes	Yes	Down	–	Not rated
FXpeek	No	Yes	Unknown	Down	–	Not rated
FreeForexAPI	No	Yes	No	Down	–	Not rated

FAQ

Are there free Currency Exchange APIs without an API key?

Yes. 15 free Currency Exchange APIs need no API key or sign-up, including Currency-api, Daleelak API and Fulusly API. You can send a request straight away.

Which keyless Currency Exchange APIs can I call from JavaScript in the browser?

8 of them also support CORS, including Currency-api, Daleelak API and Fulusly API, so a plain fetch from a web page works.

Do APIs without a key have limits?

Usually, yes. Keyless APIs typically rate-limit by IP address, so cache responses and avoid tight loops. For production traffic, an API with a free key tier often gives higher, more predictable limits.