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HOL Registry Broker vs UUID Generator API

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

APIHOL Registry BrokerNEW—UUID Generator APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

HOL Registry Broker vs UUID Generator API: common questions

Which is more reliable, HOL Registry Broker or UUID Generator API?

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

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

Can I call HOL Registry Broker and UUID Generator API from the browser?

Neither sends browser-friendly CORS headers reliably, so call HOL Registry Broker and UUID Generator API from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are HOL Registry Broker and UUID Generator API free for commercial use?

HOL Registry Broker 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.