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ELI vs VATlayer

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

APIELINEW—VATlayerNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key may be required for productionFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ELI vs VATlayer: common questions

Which is more reliable, ELI or VATlayer?

On our scheduled checks, VATlayer leads on measured uptime — ELI at —% versus VATlayer 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 ELI and VATlayer need an API key?

Both ask you to authenticate — ELI uses an API key and VATlayer uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call ELI and VATlayer from the browser?

Only ELI is browser-friendly — it returns CORS headers over HTTPS. VATlayer needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are ELI and VATlayer free for commercial use?

ELI has unclear commercial terms, and VATlayer 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.