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Minor Planet Center vs Stock Sentiment API

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

APIMinor Planet CenterNEW—Stock Sentiment APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesyes
HTTPSnoyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified (data derived from JPL/MPC)Unverified
Free tierFree — limits not publishedFree tier — API key may be required for production
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Minor Planet Center vs Stock Sentiment API: common questions

Which is more reliable, Minor Planet Center or Stock Sentiment API?

On our scheduled checks, Stock Sentiment API leads on measured uptime — Minor Planet Center at —% versus Stock Sentiment 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 Minor Planet Center and Stock Sentiment API need an API key?

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

Can I call Minor Planet Center and Stock Sentiment API from the browser?

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

Are Minor Planet Center and Stock Sentiment API free for commercial use?

Minor Planet Center 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.