shipapis
StarSubmit an APISubmit API

ITIS vs OpenAlex

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

APIITISNEW—OpenAlexNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedCC0
Free tierFree — limits not publishedFree tier (~$1/day of usage); free API key available for more
Rate limitUnpublishedUsage-metered free tier (~$1/day per docs)
In directory since2026-07-052026-07-05
operationalpartialdownno data

ITIS vs OpenAlex: common questions

Which is more reliable, ITIS or OpenAlex?

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

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

Can I call ITIS and OpenAlex from the browser?

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

Are ITIS and OpenAlex free for commercial use?

ITIS has unclear commercial terms, and OpenAlex allows commercial use on its free tier. 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.