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Hong Kong Observatory vs Solematica

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

APIHong Kong ObservatoryHEALTHY59SolematicaHEALTHY97
Uptime · 30d
Uptime · 90d98.9%100%
Uptime · 30d96.6%100%
P50 · ms1678202
P95 · ms42761414
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseHKO open data (see terms of use)Unverified
Free tierFree, no keyFree public /providers endpoint; other endpoints need paid credits
Rate limitUnpublished100 req/window · 99 remaining · resets 900
In directory since2026-07-052026-07-05
operationalpartialdownno data

Hong Kong Observatory vs Solematica: common questions

Which is more reliable, Hong Kong Observatory or Solematica?

On our scheduled checks, Solematica leads on measured uptime — Hong Kong Observatory at 98.9% versus Solematica at 100% 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, Hong Kong Observatory or Solematica?

Solematica has the lower median latency in our checks — Hong Kong Observatory responds in 1678 ms versus Solematica at 202 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 Hong Kong Observatory and Solematica need an API key?

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

Can I call Hong Kong Observatory and Solematica from the browser?

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

Are Hong Kong Observatory and Solematica free for commercial use?

Hong Kong Observatory has unclear commercial terms, and Solematica 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.