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Bluesky vs Church Calendar

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

APIBlueskyNEW—Church CalendarNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — public AppView, no keyFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Bluesky vs Church Calendar: common questions

Which is more reliable, Bluesky or Church Calendar?

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

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

Can I call Bluesky and Church Calendar from the browser?

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

Are Bluesky and Church Calendar free for commercial use?

Bluesky has unclear commercial terms, and Church 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.