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X (Twitter) API vs The Calendar

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

APIX (Twitter) APINEW—The CalendarNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified (US federal list per 5 U.S.C. § 6103)
Free tierFree tier — API key requiredFree, no auth (per site)
Rate limitUnpublishedNone stated (site advertises no rate limit)
In directory since2026-07-052026-07-05
operationalpartialdownno data

X (Twitter) API vs The Calendar: common questions

Which is more reliable, X (Twitter) API or The Calendar?

On our scheduled checks, The Calendar leads on measured uptime — X (Twitter) API 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 X (Twitter) API and The Calendar need an API key?

The Calendar needs no key, while X (Twitter) API requires a free API key. If you want to start calling without signup, reach for The Calendar first.

Can I call X (Twitter) API and The Calendar from the browser?

Yes — both X (Twitter) API 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 X (Twitter) API and The Calendar free for commercial use?

X (Twitter) API 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.