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Exchangerate.dev vs Marketstack

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

APIExchangerate.devDYING63MarketstackHEALTHY93
Uptime · 30d
Uptime · 90d71.6%100%
Uptime · 30d51.7%100%
P50 · ms336470
P95 · ms8074068
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — key may be required
Rate limit12 req/window · 11 remaining · resets 1783515720Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Exchangerate.dev vs Marketstack: common questions

Which is more reliable, Exchangerate.dev or Marketstack?

On our scheduled checks, Marketstack leads on measured uptime — Exchangerate.dev at 71.6% versus Marketstack at 100% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, Exchangerate.dev or Marketstack?

Exchangerate.dev has the lower median latency in our checks — Exchangerate.dev responds in 336 ms versus Marketstack at 470 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do Exchangerate.dev and Marketstack need an API key?

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

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

Only Exchangerate.dev 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.dev and Marketstack free for commercial use?

Exchangerate.dev 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.