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Blockchain vs Etherscan

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

APIBlockchainNEW—EtherscanNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Blockchain vs Etherscan: common questions

Which is more reliable, Blockchain or Etherscan?

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

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

Can I call Blockchain and Etherscan from the browser?

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

Are Blockchain and Etherscan free for commercial use?

Blockchain has unclear commercial terms, and Etherscan 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.