Groundhog Day API vs Hong Kong Observatory
Same instrument, two spec sheets — measured, not claimed.
Groundhog Day API vs Hong Kong Observatory: common questions
Which is more reliable, Groundhog Day API or Hong Kong Observatory?
Both are neck-and-neck — Groundhog Day 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, Groundhog Day API or Hong Kong Observatory?
Groundhog Day API has the lower median latency in our checks — Groundhog Day API responds in 262 ms versus Hong Kong Observatory at 1330 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 Groundhog Day API and Hong Kong Observatory need an API key?
Neither needs a paid key — Groundhog Day 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 Groundhog Day API and Hong Kong Observatory from the browser?
Yes — both Groundhog Day 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 Groundhog Day API and Hong Kong Observatory free for commercial use?
Groundhog Day 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.