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Catchdoms Security API vs User Agent Lookup API

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

APICatchdoms Security APIHEALTHY93User Agent Lookup APIHEALTHY96
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms437426
P95 · ms1398764
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

Catchdoms Security API vs User Agent Lookup API: common questions

Which is more reliable, Catchdoms Security API or User Agent Lookup API?

Both are neck-and-neck — Catchdoms Security API 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, Catchdoms Security API or User Agent Lookup API?

User Agent Lookup API has the lower median latency in our checks — Catchdoms Security API responds in 437 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 Catchdoms Security API and User Agent Lookup API need an API key?

Neither needs a paid key — Catchdoms Security API 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 Catchdoms Security API and User Agent Lookup API from the browser?

Neither sends browser-friendly CORS headers reliably, so call Catchdoms Security API 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 Catchdoms Security API and User Agent Lookup API free for commercial use?

Catchdoms Security API 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.