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Catchdoms Security API vs Sheetsu

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

APICatchdoms Security APINEW—SheetsuNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — key may be required
Rate limitUnpublished90 req/window · 89 remaining
In directory since2026-07-052026-07-05
operationalpartialdownno data

Catchdoms Security API vs Sheetsu: common questions

Which is more reliable, Catchdoms Security API or Sheetsu?

On our scheduled checks, Sheetsu leads on measured uptime — Catchdoms Security API at —% versus Sheetsu 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 Sheetsu need an API key?

Catchdoms Security API needs no key, while Sheetsu requires a free API key. If you want to start calling without signup, reach for Catchdoms Security API first.

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

Only Sheetsu 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 Sheetsu free for commercial use?

Catchdoms Security API has unclear commercial terms, and Sheetsu 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.