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ImprovMX API vs UK Bank Holidays

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

APIImprovMX APINEW—UK Bank HolidaysNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedOpen Government Licence v3.0
Free tierFree tier — API key requiredFree, no key
Rate limit301 req/window · 300 remaining · resets 1783526520Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ImprovMX API vs UK Bank Holidays: common questions

Which is more reliable, ImprovMX API or UK Bank Holidays?

On our scheduled checks, UK Bank Holidays leads on measured uptime — ImprovMX API at —% versus UK Bank Holidays 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 ImprovMX API and UK Bank Holidays need an API key?

UK Bank Holidays needs no key, while ImprovMX API requires a free API key. If you want to start calling without signup, reach for UK Bank Holidays first.

Can I call ImprovMX API and UK Bank Holidays from the browser?

Yes — both ImprovMX API and UK Bank Holidays 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 ImprovMX API and UK Bank Holidays free for commercial use?

ImprovMX API has unclear commercial terms, and UK Bank Holidays allows commercial use on its free tier. 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.