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chucknorris.io vs Personality.fyi

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

APIchucknorris.ioNEW—Personality.fyiNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree, no keyFree — no auth
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

chucknorris.io vs Personality.fyi: common questions

Which is more reliable, chucknorris.io or Personality.fyi?

On our scheduled checks, Personality.fyi leads on measured uptime — chucknorris.io at —% versus Personality.fyi 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 chucknorris.io and Personality.fyi need an API key?

Neither needs a paid key — chucknorris.io is callable with no signup, and Personality.fyi is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call chucknorris.io and Personality.fyi from the browser?

Yes — both chucknorris.io and Personality.fyi 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 chucknorris.io and Personality.fyi free for commercial use?

chucknorris.io has unclear commercial terms, and Personality.fyi 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.