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Free Dictionary API vs Wikidata

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

APIFree Dictionary APIHEALTHY90WikidataHEALTHY90
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms674585
P95 · ms21963283
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Free Dictionary API vs Wikidata: common questions

Which is more reliable, Free Dictionary API or Wikidata?

Both are neck-and-neck — Free Dictionary API and Wikidata each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, Free Dictionary API or Wikidata?

Wikidata has the lower median latency in our checks — Free Dictionary API responds in 674 ms versus Wikidata at 585 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do Free Dictionary API and Wikidata need an API key?

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

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

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

Are Free Dictionary API and Wikidata free for commercial use?

Free Dictionary API has unclear commercial terms, and Wikidata 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.