shipapis
StarSubmit an APISubmit API

Exchange Rates API vs Frankfurter

Same instrument, two spec sheets — measured, not claimed.

APIExchange Rates APIHEALTHY88FrankfurterHEALTHY86
Uptime · 30d
Uptime · 90d100%88.2%
Uptime · 30d100%86.7%
P50 · ms810370
P95 · ms41624986
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedPublic data (ECB reference rates)
Free tierFree — limits not publishedUnlimited — abuse-rate-limited only
Rate limitUnpublishedUnpublished, generous
In directory since2026-07-052026-05-02
operationalpartialdownno data

Exchange Rates API vs Frankfurter: common questions

Which is more reliable, Exchange Rates API or Frankfurter?

On our scheduled checks, Exchange Rates API leads on measured uptime — Exchange Rates API at 100% versus Frankfurter at 88.2% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, Exchange Rates API or Frankfurter?

Frankfurter has the lower median latency in our checks — Exchange Rates API responds in 810 ms versus Frankfurter at 370 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do Exchange Rates API and Frankfurter need an API key?

Neither needs a paid key — Exchange Rates API is callable with no signup, and Frankfurter is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Exchange Rates API and Frankfurter from the browser?

Yes — both Exchange Rates API and Frankfurter send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Exchange Rates API and Frankfurter free for commercial use?

Exchange Rates API has unclear commercial terms, and Frankfurter allows commercial use on its free tier. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.