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Shields vs Spaceflight News

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

APIShieldsNEW—Spaceflight NewsNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified (links/metadata for third-party news)
Free tierFree — limits not publishedFree — no key
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Shields vs Spaceflight News: common questions

Which is more reliable, Shields or Spaceflight News?

On our scheduled checks, Spaceflight News leads on measured uptime — Shields at —% versus Spaceflight News 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 Shields and Spaceflight News need an API key?

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

Can I call Shields and Spaceflight News from the browser?

Yes — both Shields and Spaceflight News send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Shields and Spaceflight News free for commercial use?

Shields has unclear commercial terms, and Spaceflight News 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.