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ITIS vs OpenAI API

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

APIITISNEW—OpenAI APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ITIS vs OpenAI API: common questions

Which is more reliable, ITIS or OpenAI API?

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

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

Can I call ITIS and OpenAI API from the browser?

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

Are ITIS and OpenAI API free for commercial use?

ITIS has unclear commercial terms, and OpenAI API 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.