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Blockchain.info vs BlockCypher

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

APIBlockchain.infoNEW—BlockCypherNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedRetry-After: 1787s
In directory since2026-07-052026-07-05
operationalpartialdownno data

Blockchain.info vs BlockCypher: common questions

Which is more reliable, Blockchain.info or BlockCypher?

On our scheduled checks, BlockCypher leads on measured uptime — Blockchain.info at —% versus BlockCypher 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 Blockchain.info and BlockCypher need an API key?

Neither needs a paid key — Blockchain.info is callable with no signup, and BlockCypher is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Blockchain.info and BlockCypher from the browser?

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

Are Blockchain.info and BlockCypher free for commercial use?

Blockchain.info has unclear commercial terms, and BlockCypher 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.