Aare.guru API vs Hong Kong Observatory
Same instrument, two spec sheets — measured, not claimed.
Aare.guru API vs Hong Kong Observatory: common questions
Which is more reliable, Aare.guru API or Hong Kong Observatory?
Both are neck-and-neck — Aare.guru API and Hong Kong Observatory each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.
Which is faster, Aare.guru API or Hong Kong Observatory?
Aare.guru API has the lower median latency in our checks — Aare.guru API responds in 1025 ms versus Hong Kong Observatory at 1415 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 Aare.guru API and Hong Kong Observatory need an API key?
Neither needs a paid key — Aare.guru API 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 Aare.guru API and Hong Kong Observatory from the browser?
Yes — both Aare.guru API and Hong Kong Observatory 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 Aare.guru API and Hong Kong Observatory free for commercial use?
Aare.guru API 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.