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Abstract API vs eNanoMapper database

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

APIAbstract APINEW—eNanoMapper databaseNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key may be required for productionFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Abstract API vs eNanoMapper database: common questions

Which is more reliable, Abstract API or eNanoMapper database?

On our scheduled checks, eNanoMapper database leads on measured uptime — Abstract API at —% versus eNanoMapper database 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 Abstract API and eNanoMapper database need an API key?

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

Can I call Abstract API and eNanoMapper database from the browser?

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

Are Abstract API and eNanoMapper database free for commercial use?

Abstract API has unclear commercial terms, and eNanoMapper database 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.