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ImprovMX API vs Public Time API

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

APIImprovMX APINEW—Public Time APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limit301 req/window · 300 remaining · resets 1783526520Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ImprovMX API vs Public Time API: common questions

Which is more reliable, ImprovMX API or Public Time API?

On our scheduled checks, Public Time API leads on measured uptime — ImprovMX API at —% versus Public Time API 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 Public Time API need an API key?

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

Can I call ImprovMX API and Public Time API from the browser?

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

Are ImprovMX API and Public Time API free for commercial use?

ImprovMX API has unclear commercial terms, and Public Time API 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.