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Lookup.im API vs NuGet V3 API

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

APILookup.im APIHEALTHY84NuGet V3 APIHEALTHY98
Uptime · 30d
Uptime · 90d99.02%100%
Uptime · 30d100%100%
P50 · ms1158245
P95 · ms3581776
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Lookup.im API vs NuGet V3 API: common questions

Which is more reliable, Lookup.im API or NuGet V3 API?

On our scheduled checks, NuGet V3 API leads on measured uptime — Lookup.im API at 99.02% versus NuGet V3 API at 100% 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, Lookup.im API or NuGet V3 API?

NuGet V3 API has the lower median latency in our checks — Lookup.im API responds in 1158 ms versus NuGet V3 API at 245 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 Lookup.im API and NuGet V3 API need an API key?

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

Can I call Lookup.im API and NuGet V3 API from the browser?

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

Are Lookup.im API and NuGet V3 API free for commercial use?

Lookup.im API has unclear commercial terms, and NuGet V3 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.