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NuGet V3 API vs OpenCorporates

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

APINuGet V3 APINEW—OpenCorporatesNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

NuGet V3 API vs OpenCorporates: common questions

Which is more reliable, NuGet V3 API or OpenCorporates?

On our scheduled checks, OpenCorporates leads on measured uptime — NuGet V3 API at —% versus OpenCorporates 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 NuGet V3 API and OpenCorporates need an API key?

NuGet V3 API needs no key, while OpenCorporates requires a free API key. If you want to start calling without signup, reach for NuGet V3 API first.

Can I call NuGet V3 API and OpenCorporates from the browser?

Only NuGet V3 API is browser-friendly — it returns CORS headers over HTTPS. OpenCorporates needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are NuGet V3 API and OpenCorporates free for commercial use?

NuGet V3 API has unclear commercial terms, and OpenCorporates 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.