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Free Dictionary API vs UUID Generator API

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

APIFree Dictionary APIHEALTHY90UUID Generator APIHEALTHY91
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms674737
P95 · ms21961570
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 UUID Generator API: common questions

Which is more reliable, Free Dictionary API or UUID Generator API?

Both are neck-and-neck — Free Dictionary API and UUID Generator API 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 UUID Generator API?

Free Dictionary API has the lower median latency in our checks — Free Dictionary API responds in 674 ms versus UUID Generator API at 737 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 UUID Generator API need an API key?

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

Can I call Free Dictionary API and UUID Generator API from the browser?

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

Are Free Dictionary API and UUID Generator API free for commercial use?

Free Dictionary API has unclear commercial terms, and UUID Generator 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.