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Court Rules vs Open VSX Registry API

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

APICourt RulesDYING37Open VSX Registry APIHEALTHY96
Uptime · 30d
Uptime · 90d0.0%100%
Uptime · 30d0.0%100%
P50 · ms—160
P95 · ms—1123
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified
Free tierFree — limits not published
Rate limit10800 req/window · 10799 remaining
In directory since2026-10-042026-07-05
operationalpartialdownno data

Court Rules vs Open VSX Registry API: common questions

Which is more reliable, Court Rules or Open VSX Registry API?

On our scheduled checks, Open VSX Registry API leads on measured uptime — Court Rules at 0.0% versus Open VSX Registry API at 100% 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 Court Rules and Open VSX Registry API need an API key?

Neither needs a paid key — Court Rules is callable with no signup, and Open VSX Registry API is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Court Rules and Open VSX Registry API from the browser?

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

Are Court Rules and Open VSX Registry API free for commercial use?

Court Rules has unclear commercial terms, and Open VSX Registry 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.