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Exchangerate.host vs Marketstack

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

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

Exchangerate.host vs Marketstack: common questions

Which is more reliable, Exchangerate.host or Marketstack?

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

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

Can I call Exchangerate.host and Marketstack from the browser?

Only Exchangerate.host is browser-friendly — it returns CORS headers over HTTPS. Marketstack needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Exchangerate.host and Marketstack free for commercial use?

Exchangerate.host has unclear commercial terms, and Marketstack 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.