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Catchdoms Security API vs Nationalize.io

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

APICatchdoms Security APINEW—Nationalize.ioNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
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, Nationalize.io leads on measured uptime — Catchdoms Security API at —% versus Nationalize.io 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 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.