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Fake JSON API vs VatcheckAPI

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

APIFake JSON APINEW—VatcheckAPINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Fake JSON API vs VatcheckAPI: common questions

Which is more reliable, Fake JSON API or VatcheckAPI?

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

Fake JSON API needs no key, while VatcheckAPI requires a free API key. If you want to start calling without signup, reach for Fake JSON API first.

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

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

Fake JSON API has unclear commercial terms, and VatcheckAPI 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.