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ExchangeRate-API (open) vs Exchangerate.host

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

APIExchangeRate-API (open)NEW—Exchangerate.hostNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
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

ExchangeRate-API (open) vs Exchangerate.host: common questions

Which is more reliable, ExchangeRate-API (open) or Exchangerate.host?

On our scheduled checks, Exchangerate.host leads on measured uptime — ExchangeRate-API (open) at —% versus Exchangerate.host at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do ExchangeRate-API (open) and Exchangerate.host need an API key?

Neither needs a paid key — ExchangeRate-API (open) 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 ExchangeRate-API (open) and Exchangerate.host from the browser?

Yes — both ExchangeRate-API (open) 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 ExchangeRate-API (open) and Exchangerate.host free for commercial use?

ExchangeRate-API (open) 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.