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Catchdoms Security API vs Nationalize.io

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

APICatchdoms Security APIHEALTHY93Nationalize.ioHEALTHY93
Uptime · 30d
Uptime · 90d100%97.1%
Uptime · 30d100%100%
P50 · ms437448
P95 · ms1398985
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedKeyless usage limited (x-rate-limit-limit: 25 observed); 2,500 names/mo with a free key
Rate limitUnpublishedKeyless cap 25 per x-rate-limit-limit header; remaining/reset exposed in response headers
In directory since2026-07-052026-07-05
operationalpartialdownno data

Catchdoms Security API vs Nationalize.io: common questions

Which is more reliable, Catchdoms Security API or Nationalize.io?

On our scheduled checks, Catchdoms Security API leads on measured uptime — Catchdoms Security API at 100% versus Nationalize.io at 97.1% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, Catchdoms Security API or Nationalize.io?

Catchdoms Security API has the lower median latency in our checks — Catchdoms Security API responds in 437 ms versus Nationalize.io at 448 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 Nationalize.io need an API key?

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

Can I call Catchdoms Security API and Nationalize.io from the browser?

Only Nationalize.io is browser-friendly — it returns CORS headers over HTTPS. Catchdoms Security API needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Catchdoms Security API and Nationalize.io free for commercial use?

Catchdoms Security API has unclear commercial terms, and Nationalize.io 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.