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Callook.info vs Web of Science API Expanded

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

APICallook.infoHEALTHY94Web of Science API ExpandedHEALTHY88
Uptime · 30d
Uptime · 90d100%99.02%
Uptime · 30d100%98.3%
P50 · ms437787
P95 · ms11561985
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified (data from public FCC ULS records)Unverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Callook.info vs Web of Science API Expanded: common questions

Which is more reliable, Callook.info or Web of Science API Expanded?

On our scheduled checks, Callook.info leads on measured uptime — Callook.info at 100% versus Web of Science API Expanded at 99.02% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, Callook.info or Web of Science API Expanded?

Callook.info has the lower median latency in our checks — Callook.info responds in 437 ms versus Web of Science API Expanded at 787 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do Callook.info and Web of Science API Expanded need an API key?

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

Can I call Callook.info and Web of Science API Expanded from the browser?

Only Callook.info is browser-friendly — it returns CORS headers over HTTPS. Web of Science API Expanded needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Callook.info and Web of Science API Expanded free for commercial use?

Callook.info 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.