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OkSurf vs Web of Science API Expanded

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

APIOkSurfNEW—Web of Science API ExpandedNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnono
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

OkSurf vs Web of Science API Expanded: common questions

Which is more reliable, OkSurf or Web of Science API Expanded?

On our scheduled checks, Web of Science API Expanded leads on measured uptime — OkSurf at —% versus Web of Science API Expanded 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 OkSurf and Web of Science API Expanded need an API key?

OkSurf needs no key, while Web of Science API Expanded requires a free API key. If you want to start calling without signup, reach for OkSurf first.

Can I call OkSurf and Web of Science API Expanded from the browser?

Neither sends browser-friendly CORS headers reliably, so call OkSurf and Web of Science API Expanded from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are OkSurf and Web of Science API Expanded free for commercial use?

OkSurf has unclear commercial terms, and Web of Science API Expanded 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.