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Block Lottos vs Coinlayer

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

APIBlock LottosNEW—CoinlayerNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree, no key (API docs state no key required)Free tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Block Lottos vs Coinlayer: common questions

Which is more reliable, Block Lottos or Coinlayer?

On our scheduled checks, Coinlayer leads on measured uptime — Block Lottos at —% versus Coinlayer 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 Block Lottos and Coinlayer need an API key?

Block Lottos needs no key, while Coinlayer requires a free API key. If you want to start calling without signup, reach for Block Lottos first.

Can I call Block Lottos and Coinlayer from the browser?

Yes — both Block Lottos and Coinlayer 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 Block Lottos and Coinlayer free for commercial use?

Block Lottos has unclear commercial terms, and Coinlayer 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.