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Exchange Rates API vs Markbase

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

APIExchange Rates APINEW—MarkbaseNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublished30 req/window · 29 remaining · resets 1783519324
In directory since2026-07-052026-07-05
operationalpartialdownno data

Exchange Rates API vs Markbase: common questions

Which is more reliable, Exchange Rates API or Markbase?

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

Neither needs a paid key — Exchange Rates API is callable with no signup, and Markbase is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Exchange Rates API and Markbase from the browser?

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

Are Exchange Rates API and Markbase free for commercial use?

Exchange Rates API has unclear commercial terms, and Markbase 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.