Namedays Calendar vs Kickbox

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

Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms
P95 · ms
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — open disposable-address check
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Namedays Calendar vs Kickbox: common questions

Which is more reliable, Namedays Calendar or Kickbox?

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

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

Can I call Namedays Calendar and Kickbox from the browser?

Yes — both Namedays Calendar and Kickbox send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Namedays Calendar and Kickbox free for commercial use?

Namedays Calendar has unclear commercial terms, and Kickbox 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.