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Micro User Service vs REST Countries

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

APIMicro User ServiceUNMONITORED—REST CountriesHEALTHY—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
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?

Only REST Countries is on our probe schedule so far (—% uptime over 90 days). The other is catalogued but not yet live-checked, so we can't compare measured reliability head-to-head — check the uncovered API's own status page for now.

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?

Yes — both Micro User Service and REST Countries send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

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.