Namedays Calendar vs The Muse

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

Uptime · 30d
Uptime · 90d91.2%0.0%
Uptime · 30d85.0%0.0%
P50 · ms480
P95 · ms2749
Authnonenone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limit60 req/window · 58 remainingUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Namedays Calendar vs The Muse: common questions

Which is more reliable, Namedays Calendar or The Muse?

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

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

Can I call Namedays Calendar and The Muse from the browser?

Neither sends browser-friendly CORS headers reliably, so call Namedays Calendar and The Muse from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are Namedays Calendar and The Muse free for commercial use?

Namedays Calendar has unclear commercial terms, and The Muse 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.