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Atlas Academy vs Chess.com

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

APIAtlas AcademyNEW—Chess.comNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — no API key
Rate limitUnpublishedSerial requests expected; no fixed cap published
In directory since2026-07-052026-07-05
operationalpartialdownno data

Atlas Academy vs Chess.com: common questions

Which is more reliable, Atlas Academy or Chess.com?

On our scheduled checks, Chess.com leads on measured uptime — Atlas Academy at —% versus Chess.com 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 Atlas Academy and Chess.com need an API key?

Neither needs a paid key — Atlas Academy is callable with no signup, and Chess.com is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Atlas Academy and Chess.com from the browser?

Yes — both Atlas Academy and Chess.com 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 Atlas Academy and Chess.com free for commercial use?

Atlas Academy has unclear commercial terms, and Chess.com 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.