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HTTP Dog vs Cat Facts

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

APIHTTP DogNEW—Cat FactsNEW—
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 limitUnpublished100 req/window · 96 remaining
In directory since2026-07-052026-07-05
operationalpartialdownno data

HTTP Dog vs Cat Facts: common questions

Which is more reliable, HTTP Dog or Cat Facts?

On our scheduled checks, Cat Facts leads on measured uptime — HTTP Dog at —% versus Cat Facts 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 HTTP Dog and Cat Facts need an API key?

Neither needs a paid key — HTTP Dog is callable with no signup, and Cat Facts is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call HTTP Dog and Cat Facts from the browser?

Only Cat Facts is browser-friendly — it returns CORS headers over HTTPS. HTTP Dog needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are HTTP Dog and Cat Facts free for commercial use?

HTTP Dog has unclear commercial terms, and Cat Facts 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.