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Chess.com vs SuperHeroes

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

APIChess.comHEALTHY98SuperHeroesHEALTHY81
Uptime · 30d
Uptime · 90d99.02%99.02%
Uptime · 30d98.3%98.3%
P50 · ms1681145
P95 · ms6822157
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?

Both are neck-and-neck — Chess.com and SuperHeroes each measure 99.02% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, Chess.com or SuperHeroes?

Chess.com has the lower median latency in our checks — Chess.com responds in 168 ms versus SuperHeroes at 1145 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

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.