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serpstack vs UUID Generator

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

APIserpstackNEW—UUID GeneratorNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree — limits not published
Rate limitUnpublished60 req/window · 59 remaining
In directory since2026-07-052026-07-05
operationalpartialdownno data

serpstack vs UUID Generator: common questions

Which is more reliable, serpstack or UUID Generator?

On our scheduled checks, UUID Generator leads on measured uptime — serpstack at —% versus UUID Generator 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 serpstack and UUID Generator need an API key?

UUID Generator needs no key, while serpstack requires a free API key. If you want to start calling without signup, reach for UUID Generator first.

Can I call serpstack and UUID Generator from the browser?

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

Are serpstack and UUID Generator free for commercial use?

serpstack has unclear commercial terms, and UUID Generator 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.