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Shields vs Zenodo

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

APIShieldsNEW—ZenodoNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublished30 req/window · 29 remaining · resets 1783516620
In directory since2026-07-052026-07-05
operationalpartialdownno data

Shields vs Zenodo: common questions

Which is more reliable, Shields or Zenodo?

On our scheduled checks, Zenodo leads on measured uptime — Shields at —% versus Zenodo 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 Shields and Zenodo need an API key?

Neither needs a paid key — Shields is callable with no signup, and Zenodo is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Shields and Zenodo from the browser?

Yes — both Shields and Zenodo 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 Shields and Zenodo free for commercial use?

Shields 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.