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Fixer API vs Free Dictionary API

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

APIFixer APINEW—Free Dictionary APINEW—
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 Free Dictionary API: common questions

Which is more reliable, Fixer API or Free Dictionary API?

On our scheduled checks, Free Dictionary API leads on measured uptime — Fixer API at —% versus Free Dictionary API 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 Free Dictionary API need an API key?

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

Can I call Fixer API and Free Dictionary API from the browser?

Only Free Dictionary API 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 Free Dictionary API free for commercial use?

Fixer API has unclear commercial terms, and Free Dictionary API 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.