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Shields vs UUID Generator API

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

APIShieldsHEALTHY100UUID Generator APIHEALTHY91
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms30737
P95 · ms9251570
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

Shields vs UUID Generator API: common questions

Which is more reliable, Shields or UUID Generator API?

Both are neck-and-neck — Shields 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, Shields or UUID Generator API?

Shields has the lower median latency in our checks — Shields responds in 30 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 Shields and UUID Generator API need an API key?

Neither needs a paid key — Shields 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 Shields and UUID Generator API from the browser?

Only Shields 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 Shields and UUID Generator API free for commercial use?

Shields 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.