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Chess.com vs LotteryData.io

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

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

Chess.com vs LotteryData.io: common questions

Which is more reliable, Chess.com or LotteryData.io?

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

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

Can I call Chess.com and LotteryData.io from the browser?

Only Chess.com is browser-friendly — it returns CORS headers over HTTPS. LotteryData.io needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Chess.com and LotteryData.io free for commercial use?

Chess.com has unclear commercial terms, and LotteryData.io 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.