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Catchdoms Security API vs ListLoco API

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

APICatchdoms Security APIHEALTHY93ListLoco APIHEALTHY100
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms437127
P95 · ms1398443
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 ListLoco API: common questions

Which is more reliable, Catchdoms Security API or ListLoco API?

Both are neck-and-neck — Catchdoms Security API and ListLoco 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 ListLoco API?

ListLoco API has the lower median latency in our checks — Catchdoms Security API responds in 437 ms versus ListLoco API at 127 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 ListLoco API need an API key?

Neither needs a paid key — Catchdoms Security API is callable with no signup, and ListLoco API is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Catchdoms Security API and ListLoco API from the browser?

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

Catchdoms Security API has unclear commercial terms, and ListLoco 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.