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Exchangeratesapi.io API vs Frankfurter API

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

The verdict

  • Choose Exchangeratesapi.io API if you want faster responses.
  • Choose Frankfurter API if you want to start without an API key.

Side by side

Exchangeratesapi.io APIFrankfurter API
What it doesExchange rates with currency conversion.Exchange rates, currency conversion and time series.
ProviderExchange Rates APIFrankfurter
API keyRequiredNot needed
HTTPSYesYes
CORS (browser calls)YesYes
Status todayOnline · 908 msOnline · 1501 ms
Uptime (30 days)UpUp
Developer ratingNot rated yetNot rated yet
PriceFree / free tierFree / free tier
Exchangeratesapi.io docs ↗Frankfurter docs ↗

About each API

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 →

Frankfurter logoFrankfurter API

Exchange rates, currency conversion and time series.

Free, open-source exchange rates API for 223 currencies. Current and historical rates from 105 central banks and official sources. No API key required.

Strengths

  • No API key needed
  • 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.
  • 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.

Exchangeratesapi.io vs Frankfurter FAQ

Which needs an API key, Exchangeratesapi.io API or Frankfurter API?

Exchangeratesapi.io API requires an API key; Frankfurter API doesn't, so Frankfurter API is quicker to try.

More comparisons

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