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Emailvalidation vs Namedays Calendar

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

APIEmailvalidationDEAD0Namedays CalendarDYING88
Uptime · 30d
Uptime · 90d0.0%91.2%
Uptime · 30d0.0%85.0%
P50 · ms—480
P95 · ms—2749
AuthapiKeynone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublished60 req/window · 58 remaining
In directory since2026-07-052026-07-05
operationalpartialdownno data

Emailvalidation vs Namedays Calendar: common questions

Which is more reliable, Emailvalidation or Namedays Calendar?

On our scheduled checks, Namedays Calendar leads on measured uptime — Emailvalidation at 0.0% versus Namedays Calendar at 91.2% 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 Emailvalidation and Namedays Calendar need an API key?

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

Can I call Emailvalidation and Namedays Calendar from the browser?

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

Are Emailvalidation and Namedays Calendar free for commercial use?

Emailvalidation has unclear commercial terms, and Namedays Calendar 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.