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REST Countries vs Web of Science API Expanded

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

APIREST CountriesHEALTHY—Web of Science API ExpandedNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licenseMPL-2.0Unverified
Free tierUnlimitedFree tier — API key required
Rate limitNone publishedUnpublished
In directory since2026-05-022026-07-05
operationalpartialdownno data

REST Countries vs Web of Science API Expanded: common questions

Which is more reliable, REST Countries or Web of Science API Expanded?

On our scheduled checks, Web of Science API Expanded leads on measured uptime — REST Countries at —% versus Web of Science API Expanded at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do REST Countries and Web of Science API Expanded need an API key?

REST Countries needs no key, while Web of Science API Expanded requires a free API key. If you want to start calling without signup, reach for REST Countries first.

Can I call REST Countries and Web of Science API Expanded from the browser?

Only REST Countries is browser-friendly — it returns CORS headers over HTTPS. Web of Science API Expanded needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are REST Countries and Web of Science API Expanded free for commercial use?

REST Countries allows commercial use on its free tier, and Web of Science API Expanded 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.