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Church Calendar vs The Muse

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

APIChurch CalendarNEW—The MuseNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSnoyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Church Calendar vs The Muse: common questions

Which is more reliable, Church Calendar or The Muse?

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

Neither needs a paid key — Church 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 Church Calendar and The Muse from the browser?

Neither sends browser-friendly CORS headers reliably, so call Church 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 Church Calendar and The Muse free for commercial use?

Church 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.