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Lookup.im API vs Mediastack

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

APILookup.im APIHEALTHY84MediastackHEALTHY93
Uptime · 30d
Uptime · 90d99.02%100%
Uptime · 30d100%100%
P50 · ms1158449
P95 · ms35811356
AuthapiKeyapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Lookup.im API vs Mediastack: common questions

Which is more reliable, Lookup.im API or Mediastack?

On our scheduled checks, Mediastack leads on measured uptime — Lookup.im API at 99.02% versus Mediastack at 100% 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, Lookup.im API or Mediastack?

Mediastack has the lower median latency in our checks — Lookup.im API responds in 1158 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 Lookup.im API and Mediastack need an API key?

Both ask you to authenticate — Lookup.im API uses an API key and Mediastack uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call Lookup.im API and Mediastack from the browser?

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

Are Lookup.im API and Mediastack free for commercial use?

Lookup.im API 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.