Groundhog Day API vs openSenseMap
Same instrument, two spec sheets — measured, not claimed.
Groundhog Day API vs openSenseMap: common questions
Which is more reliable, Groundhog Day API or openSenseMap?
On our scheduled checks, Groundhog Day API leads on measured uptime — Groundhog Day API at 100% versus openSenseMap at 90.2% 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, Groundhog Day API or openSenseMap?
Groundhog Day API has the lower median latency in our checks — Groundhog Day API responds in 262 ms versus openSenseMap at 655 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 openSenseMap need an API key?
Neither needs a paid key — Groundhog Day API is callable with no signup, and openSenseMap is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Groundhog Day API and openSenseMap from the browser?
Yes — both Groundhog Day API and openSenseMap 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 openSenseMap free for commercial use?
Groundhog Day API has unclear commercial terms, and openSenseMap 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.