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eLife Sciences API vs Kroki

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

APIeLife Sciences APINEW—KrokiNEW—
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 limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

eLife Sciences API vs Kroki: common questions

Which is more reliable, eLife Sciences API or Kroki?

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

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

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

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

eLife Sciences API has unclear commercial terms, and Kroki 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.