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Open Notify vs OpenAI API

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

APIOpen NotifyDYING—OpenAI APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesyes
HTTPSnoyes
Card requirednono
Commercial useunclearunclear
Data licensen/aUnverified
Free tierUnlimited (volunteer-run)Free tier — API key required
Rate limitPlease be gentleUnpublished
In directory since2026-05-022026-07-05
operationalpartialdownno data

Open Notify vs OpenAI API: common questions

Which is more reliable, Open Notify or OpenAI API?

On our scheduled checks, OpenAI API leads on measured uptime — Open Notify at —% versus OpenAI API at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do Open Notify and OpenAI API need an API key?

Open Notify needs no key, while OpenAI API requires a free API key. If you want to start calling without signup, reach for Open Notify first.

Can I call Open Notify and OpenAI API from the browser?

Only OpenAI API is browser-friendly — it returns CORS headers over HTTPS. Open Notify needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Open Notify and OpenAI API free for commercial use?

Open Notify has unclear commercial terms, and OpenAI API 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.