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Exchange Rates API vs Exchangerate.host

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

APIExchange Rates APIHEALTHY88Exchangerate.hostHEALTHY93
Uptime · 30d
Uptime · 90d100%99.02%
Uptime · 30d100%98.3%
P50 · ms810398
P95 · ms41623637
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Exchange Rates API vs Exchangerate.host: common questions

Which is more reliable, Exchange Rates API or Exchangerate.host?

On our scheduled checks, Exchange Rates API leads on measured uptime — Exchange Rates API at 100% versus Exchangerate.host at 99.02% 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 Exchangerate.host?

Exchangerate.host has the lower median latency in our checks — Exchange Rates API responds in 810 ms versus Exchangerate.host at 398 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 Exchangerate.host need an API key?

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

Can I call Exchange Rates API and Exchangerate.host from the browser?

Yes — both Exchange Rates API and Exchangerate.host 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 Exchangerate.host free for commercial use?

Exchange Rates API has unclear commercial terms, and Exchangerate.host has unclear commercial terms. 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.