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CustomGPT.ai vs Universities List

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

APICustomGPT.aiNEW—Universities ListNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

CustomGPT.ai vs Universities List: common questions

Which is more reliable, CustomGPT.ai or Universities List?

On our scheduled checks, Universities List leads on measured uptime — CustomGPT.ai at —% versus Universities List 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 CustomGPT.ai and Universities List need an API key?

Universities List needs no key, while CustomGPT.ai requires a free API key. If you want to start calling without signup, reach for Universities List first.

Can I call CustomGPT.ai and Universities List from the browser?

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

Are CustomGPT.ai and Universities List free for commercial use?

CustomGPT.ai has unclear commercial terms, and Universities List 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.