shipapis
StarSubmit an APISubmit API

Exchangerate.dev vs Helium

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

APIExchangerate.devNEW—HeliumNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFirst 50 queries per IP free, no key (paid API key beyond, ~$0.02/query)
Rate limit12 req/window · 11 remaining · resets 178351572050 free queries per IP subnet
In directory since2026-07-052026-07-05
operationalpartialdownno data

Exchangerate.dev vs Helium: common questions

Which is more reliable, Exchangerate.dev or Helium?

On our scheduled checks, Helium leads on measured uptime — Exchangerate.dev at —% versus Helium 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.dev and Helium need an API key?

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

Can I call Exchangerate.dev and Helium from the browser?

Neither sends browser-friendly CORS headers reliably, so call Exchangerate.dev and Helium from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are Exchangerate.dev and Helium free for commercial use?

Exchangerate.dev has unclear commercial terms, and Helium 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.