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Stock Sentiment API vs USPTO

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

APIStock Sentiment APINEW—USPTONEW—
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

Stock Sentiment API vs USPTO: common questions

Which is more reliable, Stock Sentiment API or USPTO?

On our scheduled checks, USPTO leads on measured uptime — Stock Sentiment API 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 Stock Sentiment API and USPTO need an API key?

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

Can I call Stock Sentiment API and USPTO from the browser?

Only Stock Sentiment API 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 Stock Sentiment API and USPTO free for commercial use?

Stock Sentiment API 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.