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Helium vs RBA Exchange Rates API

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

APIHeliumDEAD0RBA Exchange Rates APIDEAD0
Uptime · 30d
Uptime · 90d0.0%0.0%
Uptime · 30d0.0%0.0%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFirst 50 queries per IP free, no key (paid API key beyond, ~$0.02/query)Free tier — API key required
Rate limit50 free queries per IP subnetUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Helium vs RBA Exchange Rates API: common questions

Which is more reliable, Helium or RBA Exchange Rates API?

Both are neck-and-neck — Helium and RBA Exchange Rates API each measure 0.0% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Do Helium and RBA Exchange Rates API need an API key?

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

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

Only RBA Exchange Rates API is browser-friendly — it returns CORS headers over HTTPS. Helium needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Helium and RBA Exchange Rates API free for commercial use?

Helium 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.