Micro User Service vs REST Countries

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

Uptime · 30d
Uptime · 90d18.6%100%
Uptime · 30d0.0%100%
P50 · ms231328
P95 · ms8271189
AuthapiKeynone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedMPL-2.0
Free tierFree tier — key may be requiredUnlimited
Rate limitUnpublishedNone published
In directory since2026-07-052026-05-02
operationalpartialdownno data

Micro User Service vs REST Countries: common questions

Which is more reliable, Micro User Service or REST Countries?

On our scheduled checks, REST Countries leads on measured uptime — Micro User Service at 18.6% versus REST Countries 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, Micro User Service or REST Countries?

Micro User Service has the lower median latency in our checks — Micro User Service responds in 231 ms versus REST Countries at 328 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 Micro User Service and REST Countries need an API key?

REST Countries needs no key, while Micro User Service requires a free API key. If you want to start calling without signup, reach for REST Countries first.

Can I call Micro User Service and REST Countries from the browser?

Neither sends browser-friendly CORS headers reliably, so call Micro User Service and REST Countries from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are Micro User Service and REST Countries free for commercial use?

Micro User Service has unclear commercial terms, and REST Countries allows commercial use on its free tier. 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.