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Check e-mail or username for a data breach vs HackMyIP

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

APICheck e-mail or username for a data breachNEW—HackMyIPNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedCompletely free — no API key, no signup
Rate limitUnpublished100 req/window
In directory since2026-07-052026-07-05
operationalpartialdownno data

Check e-mail or username for a data breach vs HackMyIP: common questions

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

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

Neither needs a paid key — Check e-mail or username for a data breach is callable with no signup, and HackMyIP 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 HackMyIP from the browser?

Only HackMyIP 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 HackMyIP free for commercial use?

Check e-mail or username for a data breach has unclear commercial terms, and HackMyIP allows commercial use on its free tier. 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.