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Check e-mail or username for a data breach vs Zippopotam.us

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

APICheck e-mail or username for a data breachNEW—Zippopotam.usNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Check e-mail or username for a data breach vs Zippopotam.us: common questions

Which is more reliable, Check e-mail or username for a data breach or Zippopotam.us?

On our scheduled checks, Zippopotam.us leads on measured uptime — Check e-mail or username for a data breach at —% versus Zippopotam.us 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 Check e-mail or username for a data breach and Zippopotam.us need an API key?

Neither needs a paid key — Check e-mail or username for a data breach is callable with no signup, and Zippopotam.us is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Check e-mail or username for a data breach and Zippopotam.us from the browser?

Only Zippopotam.us is browser-friendly — it returns CORS headers over HTTPS. Check e-mail or username for a data breach needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Check e-mail or username for a data breach and Zippopotam.us free for commercial use?

Check e-mail or username for a data breach has unclear commercial terms, and Zippopotam.us 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.