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Free Dictionary API vs Umeå Open Data

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

APIFree Dictionary APINEW—Umeå Open DataNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedVaries by dataset (municipal open data; see portal)
Free tierFree — limits not publishedFree — open data portal, no key
Rate limitUnpublished1000 req/window · 999 remaining · resets 2026-07-09 00:00:00+00:00
In directory since2026-07-052026-07-05
operationalpartialdownno data

Free Dictionary API vs Umeå Open Data: common questions

Which is more reliable, Free Dictionary API or Umeå Open Data?

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

Neither needs a paid key — Free Dictionary API is callable with no signup, and Umeå Open Data is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Free Dictionary API and Umeå Open Data from the browser?

Yes — both Free Dictionary API and Umeå Open Data 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 Free Dictionary API and Umeå Open Data free for commercial use?

Free Dictionary API has unclear commercial terms, and Umeå Open Data 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.