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Dog CEO vs Cataas

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

APIDog CEOHEALTHY—CataasNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licenseStanford Dogs datasetUnverified
Free tierUnlimitedFree — limits not published
Rate limitNone publishedUnpublished
In directory since2026-05-022026-07-05
operationalpartialdownno data

Dog CEO vs Cataas: common questions

Which is more reliable, Dog CEO or Cataas?

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

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

Can I call Dog CEO and Cataas from the browser?

Yes — both Dog CEO and Cataas send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Dog CEO and Cataas free for commercial use?

Dog CEO allows commercial use on its free tier, and Cataas 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.