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Lookup.im API vs Micro User Service

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

APILookup.im APIHEALTHY84Micro User ServiceDEAD0
Uptime · 30d
Uptime · 90d99.02%18.6%
Uptime · 30d100%0.0%
P50 · ms1158231
P95 · ms3581827
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 Micro User Service: common questions

Which is more reliable, Lookup.im API or Micro User Service?

On our scheduled checks, Lookup.im API leads on measured uptime — Lookup.im API at 99.02% versus Micro User Service at 18.6% 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 Micro User Service?

Micro User Service has the lower median latency in our checks — Lookup.im API responds in 1158 ms versus Micro User Service at 231 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 Micro User Service need an API key?

Both ask you to authenticate — Lookup.im API uses an API key and Micro User Service 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 Micro User Service from the browser?

Neither sends browser-friendly CORS headers reliably, so call Lookup.im API and Micro User Service 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 Micro User Service free for commercial use?

Lookup.im API has unclear commercial terms, and Micro User Service 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.