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Currencylayer API vs Exchangeratesapi.io API

Two free Currency Exchange APIs compared on access, reliability and developer ratings, using data from our daily health checks.

The verdict

  • Choose Currencylayer API for its data: Exchange rates and currency conversion.
  • Choose Exchangeratesapi.io API if you want to call it from browser JavaScript.

Side by side

Currencylayer APIExchangeratesapi.io API
What it doesExchange rates and currency conversion.Exchange rates with currency conversion.
ProviderCurrencylayerExchange Rates API
API keyRequiredRequired
HTTPSYesYes
CORS (browser calls)UnknownYes
Status todayOnline · 1175 msOnline · 908 ms
Uptime (30 days)UpUp
Developer ratingNot rated yetNot rated yet
PriceFree / free tierFree / free tier
Currencylayer docs ↗Exchangeratesapi.io docs ↗

About each API

Currencylayer logoCurrencylayer API

Exchange rates and currency conversion.

Free and startup-friendly currency converter JSON API for real-time and historical exchange rates - reliable and accurate, supporting 168 world currencies.

Strengths

  • HTTPS

Ratings, reviews and FAQ →

Exchangeratesapi.io logoExchangeratesapi.io API

Exchange rates with currency conversion.

Power your product with accurate FX rates. Free REST API, JSON output, 60 second updates and historical data back to 1999. Trusted by 100,000+ developers.

Strengths

  • Callable from the browser (CORS)
  • HTTPS

Ratings, reviews and FAQ →

How to choose between them

  • Prototyping or a tutorial? Pick the one that needs no API key (neither does, so compare their free tiers).
  • Calling from a web page? You need CORS. Otherwise route requests through your own server or a serverless function.
  • Going to production? Favour HTTPS, a strong uptime record and a provider with clear rate limits and terms. Check each API's docs before you commit.
  • Still unsure? Both are free to try: send one request to each and compare the data you get back.

Currencylayer vs Exchangeratesapi.io FAQ

Do Currencylayer API and Exchangeratesapi.io API need an API key?

Both require authentication (apiKey and apiKey).

Which can I call from the browser?

Exchangeratesapi.io API supports CORS, so front-end JavaScript can call it directly. Call the other from a server.

More comparisons

Currencylayer API alternatives · Exchangeratesapi.io API alternatives · best Currency Exchange APIs