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Fixer vs Markbase

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

APIFixerNEW—MarkbaseNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublished30 req/window · 29 remaining · resets 1783519324
In directory since2026-07-052026-07-05
operationalpartialdownno data

Fixer vs Markbase: common questions

Which is more reliable, Fixer or Markbase?

On our scheduled checks, Markbase leads on measured uptime — Fixer 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 Fixer and Markbase need an API key?

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

Can I call Fixer and Markbase from the browser?

Yes — both Fixer and Markbase send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Fixer and Markbase free for commercial use?

Fixer 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.