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Callook.info vs Mediastack

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

APICallook.infoHEALTHY94MediastackHEALTHY93
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms437449
P95 · ms11561356
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified (data from public FCC ULS records)Unverified
Free tierFree — limits not publishedFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Callook.info vs Mediastack: common questions

Which is more reliable, Callook.info or Mediastack?

Both are neck-and-neck — Callook.info and Mediastack each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, Callook.info or Mediastack?

Callook.info has the lower median latency in our checks — Callook.info responds in 437 ms versus Mediastack at 449 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 Mediastack need an API key?

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

Can I call Callook.info and Mediastack from the browser?

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

Are Callook.info and Mediastack free for commercial use?

Callook.info has unclear commercial terms, and Mediastack 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.