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Lookup.im API vs Zenodo

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

APILookup.im APIHEALTHY89ZenodoHEALTHY57
Uptime · 30d
Uptime · 90d97.8%94.4%
Uptime · 30d98.3%96.6%
P50 · ms1801803
P95 · ms35814935
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublished30 req/window · 29 remaining · resets 1783516620
In directory since2026-07-052026-07-05
operationalpartialdownno data

Lookup.im API vs Zenodo: common questions

Which is more reliable, Lookup.im API or Zenodo?

On our scheduled checks, Lookup.im API leads on measured uptime — Lookup.im API at 97.8% versus Zenodo at 94.4% 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 Zenodo?

Lookup.im API has the lower median latency in our checks — Lookup.im API responds in 180 ms versus Zenodo at 1803 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 Zenodo need an API key?

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

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

Only Zenodo 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 Zenodo free for commercial use?

Lookup.im API has unclear commercial terms, and Zenodo 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.