MedlinePlus Genetics vs NPPES
Same instrument, two spec sheets — measured, not claimed.
MedlinePlus Genetics vs NPPES: common questions
Which is more reliable, MedlinePlus Genetics or NPPES?
On our scheduled checks, NPPES leads on measured uptime — MedlinePlus Genetics at 99.02% versus NPPES at 100% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Which is faster, MedlinePlus Genetics or NPPES?
NPPES has the lower median latency in our checks — MedlinePlus Genetics responds in 1877 ms versus NPPES at 910 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.
Do MedlinePlus Genetics and NPPES need an API key?
Neither needs a paid key — MedlinePlus Genetics is callable with no signup, and NPPES is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call MedlinePlus Genetics and NPPES from the browser?
Only MedlinePlus Genetics is browser-friendly — it returns CORS headers over HTTPS. NPPES needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are MedlinePlus Genetics and NPPES free for commercial use?
MedlinePlus Genetics has unclear commercial terms, and NPPES allows commercial use on its free tier. 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.