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Fake JSON API vs NetworkCalc

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

APIFake JSON APINEW—NetworkCalcNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree public API, no key
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Fake JSON API vs NetworkCalc: common questions

Which is more reliable, Fake JSON API or NetworkCalc?

On our scheduled checks, NetworkCalc leads on measured uptime — Fake JSON API at —% versus NetworkCalc 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 Fake JSON API and NetworkCalc need an API key?

Neither needs a paid key — Fake JSON API is callable with no signup, and NetworkCalc is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Fake JSON API and NetworkCalc from the browser?

Yes — both Fake JSON API and NetworkCalc 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 Fake JSON API and NetworkCalc free for commercial use?

Fake JSON API has unclear commercial terms, and NetworkCalc 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.