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Mempool vs Sharpe

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

APIMempoolNEW—SharpeNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified (open-source project)Unverified
Free tierFree public API; no key for basic usageFree — limits not published
Rate limitEnforced — HTTP 429 on excess, repeated abuse may be banned; numeric limits unpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Mempool vs Sharpe: common questions

Which is more reliable, Mempool or Sharpe?

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

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

Can I call Mempool and Sharpe from the browser?

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

Are Mempool and Sharpe free for commercial use?

Mempool has unclear commercial terms, and Sharpe 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.