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Exchangerate.host vs RBA Exchange Rates API

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

APIExchangerate.hostNEW—RBA Exchange Rates APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Exchangerate.host vs RBA Exchange Rates API: common questions

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

On our scheduled checks, RBA Exchange Rates API leads on measured uptime — Exchangerate.host at —% versus RBA Exchange Rates API 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.host and RBA Exchange Rates API need an API key?

Exchangerate.host needs no key, while RBA Exchange Rates API requires a free API key. If you want to start calling without signup, reach for Exchangerate.host first.

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

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

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