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Chess.com vs SuperHeroes

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

APIChess.comNEW—SuperHeroesNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — no API keyFree tier — key may be required
Rate limitSerial requests expected; no fixed cap publishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Chess.com vs SuperHeroes: common questions

Which is more reliable, Chess.com or SuperHeroes?

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

Chess.com needs no key, while SuperHeroes requires a free API key. If you want to start calling without signup, reach for Chess.com first.

Can I call Chess.com and SuperHeroes from the browser?

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

Chess.com has unclear commercial terms, and SuperHeroes 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.