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ExchangeRate-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 ExchangeRate-API if you want faster responses.
  • Choose Frankfurter API if you want to start without an API key.

Side by side

ExchangeRate-APIFrankfurter API
What it doesAccurate & reliable Exchange Rates API trusted by tens of thousands of developers since 2010.Exchange rates, currency conversion and time series.
ProviderExchangeRate-APIFrankfurter
API keyRequiredNot needed
HTTPSYesYes
CORS (browser calls)YesYes
Status todayOnline · 247 msOnline · 1501 ms
Uptime (30 days)UpUp
Developer ratingNot rated yetNot rated yet
PriceFree / free tierFree / free tier
ExchangeRate-API docs ↗Frankfurter docs ↗

About each API

ExchangeRate-API logoExchangeRate-API

Accurate & reliable Exchange Rates API trusted by tens of thousands of developers since 2010.

Accurate & reliable Exchange Rates API trusted by tens of thousands of developers since 2010. Free access, all world currencies, helpful support & easy to integrate JSON API.

Strengths

  • Fast: 247 ms response
  • 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.

ExchangeRate-API vs Frankfurter FAQ

Which needs an API key, ExchangeRate-API or Frankfurter API?

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

More comparisons

ExchangeRate-API alternatives · Frankfurter API alternatives · best Currency Exchange APIs