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Coinlayer vs Gemini

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

APICoinlayerNEW—GeminiNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredPublic market data endpoints are keyless and free
Rate limitUnpublishedPublic API throttled per IP (specific numeric limit not confirmed at probe time)
In directory since2026-07-052026-07-05
operationalpartialdownno data

Coinlayer vs Gemini: common questions

Which is more reliable, Coinlayer or Gemini?

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

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

Can I call Coinlayer and Gemini from the browser?

Yes — both Coinlayer and Gemini 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 Coinlayer and Gemini free for commercial use?

Coinlayer has unclear commercial terms, and Gemini 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.