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CIRCL CVE Search vs Universities List

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

APICIRCL CVE SearchNEW—Universities ListNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

CIRCL CVE Search vs Universities List: common questions

Which is more reliable, CIRCL CVE Search or Universities List?

On our scheduled checks, Universities List leads on measured uptime — CIRCL CVE Search at —% versus Universities List 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 CIRCL CVE Search and Universities List need an API key?

Universities List needs no key, while CIRCL CVE Search requires a free API key. If you want to start calling without signup, reach for Universities List first.

Can I call CIRCL CVE Search and Universities List from the browser?

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

Are CIRCL CVE Search and Universities List free for commercial use?

CIRCL CVE Search has unclear commercial terms, and Universities List 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.