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eLife Sciences API vs Userstack

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

APIeLife Sciences APINEW—UserstackNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesyes
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

eLife Sciences API vs Userstack: common questions

Which is more reliable, eLife Sciences API or Userstack?

On our scheduled checks, Userstack leads on measured uptime — eLife Sciences API at —% versus Userstack 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 eLife Sciences API and Userstack need an API key?

eLife Sciences API needs no key, while Userstack requires a free API key. If you want to start calling without signup, reach for eLife Sciences API first.

Can I call eLife Sciences API and Userstack from the browser?

Yes — both eLife Sciences API and Userstack 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 eLife Sciences API and Userstack free for commercial use?

eLife Sciences API has unclear commercial terms, and Userstack 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.