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Catchdoms Security API vs JSONPlaceholder

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

APICatchdoms Security APINEW—JSONPlaceholderNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublished1000 req/window · 999 remaining · resets 1783509378
In directory since2026-07-052026-07-05
operationalpartialdownno data

Catchdoms Security API vs JSONPlaceholder: common questions

Which is more reliable, Catchdoms Security API or JSONPlaceholder?

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

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

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

Only JSONPlaceholder 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 JSONPlaceholder free for commercial use?

Catchdoms Security API has unclear commercial terms, and JSONPlaceholder 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.