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Noctua vs Stock Sentiment API

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

APINoctuaHEALTHY91Stock Sentiment APIHEALTHY92
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms742531
P95 · ms20371388
AuthnoneapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key may be required for production
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Noctua vs Stock Sentiment API: common questions

Which is more reliable, Noctua or Stock Sentiment API?

Both are neck-and-neck — Noctua and Stock Sentiment API each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, Noctua or Stock Sentiment API?

Stock Sentiment API has the lower median latency in our checks — Noctua responds in 742 ms versus Stock Sentiment API at 531 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 Noctua and Stock Sentiment API need an API key?

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

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

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

Are Noctua and Stock Sentiment API free for commercial use?

Noctua has unclear commercial terms, and Stock Sentiment 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.