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eNanoMapper database vs VATlayer

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

APIeNanoMapper databaseNEW—VATlayerNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

eNanoMapper database vs VATlayer: common questions

Which is more reliable, eNanoMapper database or VATlayer?

On our scheduled checks, VATlayer leads on measured uptime — eNanoMapper database 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 eNanoMapper database and VATlayer need an API key?

eNanoMapper database needs no key, while VATlayer requires a free API key. If you want to start calling without signup, reach for eNanoMapper database first.

Can I call eNanoMapper database and VATlayer from the browser?

Neither sends browser-friendly CORS headers reliably, so call eNanoMapper database and VATlayer from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are eNanoMapper database and VATlayer free for commercial use?

eNanoMapper database 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.