Telegraph vs The Calendar
Same instrument, two spec sheets — measured, not claimed.
Telegraph vs The Calendar: common questions
Which is more reliable, Telegraph or The Calendar?
On our scheduled checks, The Calendar leads on measured uptime — Telegraph at —% versus The 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 Telegraph and The Calendar need an API key?
The Calendar needs no key, while Telegraph requires a free API key. If you want to start calling without signup, reach for The Calendar first.
Can I call Telegraph and The Calendar from the browser?
Yes — both Telegraph and The Calendar 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 Telegraph and The Calendar free for commercial use?
Telegraph has unclear commercial terms, and The 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.