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7Timer! vs Hong Kong Observatory

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

API7Timer!HEALTHY92Hong Kong ObservatoryHEALTHY59
Uptime · 30d
Uptime · 90d100%98.9%
Uptime · 30d100%96.6%
P50 · ms4991678
P95 · ms29354276
Authnonenone
CORSnoyes
HTTPSnoyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedHKO open data (see terms of use)
Free tierFree — limits not publishedFree, no key
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

7Timer! vs Hong Kong Observatory: common questions

Which is more reliable, 7Timer! or Hong Kong Observatory?

On our scheduled checks, 7Timer! leads on measured uptime — 7Timer! at 100% versus Hong Kong Observatory at 98.9% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, 7Timer! or Hong Kong Observatory?

7Timer! has the lower median latency in our checks — 7Timer! responds in 499 ms versus Hong Kong Observatory at 1678 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do 7Timer! and Hong Kong Observatory need an API key?

Neither needs a paid key — 7Timer! is callable with no signup, and Hong Kong Observatory is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call 7Timer! and Hong Kong Observatory from the browser?

Only Hong Kong Observatory is browser-friendly — it returns CORS headers over HTTPS. 7Timer! needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are 7Timer! and Hong Kong Observatory free for commercial use?

7Timer! has unclear commercial terms, and Hong Kong Observatory 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.