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Open VSX Registry API vs Spaceflight News

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

APIOpen VSX Registry APIHEALTHY95Spaceflight NewsHEALTHY63
Uptime · 30d
Uptime · 90d100%95.1%
Uptime · 30d100%91.7%
P50 · ms245864
P95 · ms6934497
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified (links/metadata for third-party news)
Free tierFree — limits not publishedFree — no key
Rate limit10800 req/window · 10799 remainingUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Open VSX Registry API vs Spaceflight News: common questions

Which is more reliable, Open VSX Registry API or Spaceflight News?

On our scheduled checks, Open VSX Registry API leads on measured uptime — Open VSX Registry API at 100% versus Spaceflight News at 95.1% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, Open VSX Registry API or Spaceflight News?

Open VSX Registry API has the lower median latency in our checks — Open VSX Registry API responds in 245 ms versus Spaceflight News at 864 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 Open VSX Registry API and Spaceflight News need an API key?

Neither needs a paid key — Open VSX Registry API 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 Open VSX Registry API and Spaceflight News from the browser?

Yes — both Open VSX Registry API 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 Open VSX Registry API and Spaceflight News free for commercial use?

Open VSX Registry API 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.