The Calendar vs The Muse
Same instrument, two spec sheets — measured, not claimed.
The Calendar vs The Muse: common questions
Which is more reliable, The Calendar or The Muse?
On our scheduled checks, The Muse leads on measured uptime — The 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 The Calendar and The Muse need an API key?
Neither needs a paid key — The 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 The Calendar and The Muse from the browser?
Only The Calendar is browser-friendly — it returns CORS headers over HTTPS. The Muse needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are The Calendar and The Muse free for commercial use?
The 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.