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TensorFeed vs USPTO

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

APITensorFeedNEW—USPTONEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — no key (static JSON feed endpoints)Free — limits not published
Rate limit120 req/window · 119 remaining · resets 60Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

TensorFeed vs USPTO: common questions

Which is more reliable, TensorFeed or USPTO?

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

Neither needs a paid key — TensorFeed is callable with no signup, and USPTO is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call TensorFeed and USPTO from the browser?

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

Are TensorFeed and USPTO free for commercial use?

TensorFeed has unclear commercial terms, and USPTO 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.