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CIRCL CVE Search vs OkSurf

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

APICIRCL CVE SearchNEW—OkSurfNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesno
HTTPSyesyes
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 OkSurf: common questions

Which is more reliable, CIRCL CVE Search or OkSurf?

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

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

Can I call CIRCL CVE Search and OkSurf from the browser?

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

Are CIRCL CVE Search and OkSurf free for commercial use?

CIRCL CVE Search has unclear commercial terms, and OkSurf 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.