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Fixer API vs Onyx Bazaar

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

APIFixer APINEW—Onyx BazaarNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Fixer API vs Onyx Bazaar: common questions

Which is more reliable, Fixer API or Onyx Bazaar?

On our scheduled checks, Onyx Bazaar leads on measured uptime — Fixer API at —% versus Onyx Bazaar 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 API and Onyx Bazaar need an API key?

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

Can I call Fixer API and Onyx Bazaar from the browser?

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

Are Fixer API and Onyx Bazaar free for commercial use?

Fixer API has unclear commercial terms, and Onyx Bazaar 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.