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DomainDb Info vs User Agent Lookup API

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

APIDomainDb InfoHEALTHY97User Agent Lookup APIHEALTHY96
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms234426
P95 · ms1635764
Authnonenone
CORSnono
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

DomainDb Info vs User Agent Lookup API: common questions

Which is more reliable, DomainDb Info or User Agent Lookup API?

Both are neck-and-neck — DomainDb Info and User Agent Lookup 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, DomainDb Info or User Agent Lookup API?

DomainDb Info has the lower median latency in our checks — DomainDb Info responds in 234 ms versus User Agent Lookup API at 426 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 DomainDb Info and User Agent Lookup API need an API key?

Neither needs a paid key — DomainDb Info is callable with no signup, and User Agent Lookup API is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call DomainDb Info and User Agent Lookup API from the browser?

Neither sends browser-friendly CORS headers reliably, so call DomainDb Info and User Agent Lookup API from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are DomainDb Info and User Agent Lookup API free for commercial use?

DomainDb Info has unclear commercial terms, and User Agent Lookup 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.