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RBA Exchange Rates API vs Tax Data

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

APIRBA Exchange Rates APINEW—Tax DataNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

RBA Exchange Rates API vs Tax Data: common questions

Which is more reliable, RBA Exchange Rates API or Tax Data?

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

Both ask you to authenticate — RBA Exchange Rates API uses an API key and Tax Data uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call RBA Exchange Rates API and Tax Data from the browser?

Yes — both RBA Exchange Rates API and Tax Data 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 RBA Exchange Rates API and Tax Data free for commercial use?

RBA Exchange Rates API has unclear commercial terms, and Tax Data 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.