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Callook.info vs User Data Scraper

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

APICallook.infoNEW—User Data ScraperNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified (data from public FCC ULS records)Unverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Callook.info vs User Data Scraper: common questions

Which is more reliable, Callook.info or User Data Scraper?

On our scheduled checks, User Data Scraper leads on measured uptime — Callook.info at —% versus User Data Scraper 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 Callook.info and User Data Scraper need an API key?

Neither needs a paid key — Callook.info is callable with no signup, and User Data Scraper is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Callook.info and User Data Scraper from the browser?

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

Are Callook.info and User Data Scraper free for commercial use?

Callook.info has unclear commercial terms, and User Data Scraper 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.