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HasData: Structured Web Data APIs vs Open VSX Registry API

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

APIHasData: Structured Web Data APIsHEALTHY70Open VSX Registry APIHEALTHY95
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms768245
P95 · ms1464693
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublished10800 req/window · 10799 remaining
In directory since2026-07-052026-07-05
operationalpartialdownno data

HasData: Structured Web Data APIs vs Open VSX Registry API: common questions

Which is more reliable, HasData: Structured Web Data APIs or Open VSX Registry API?

Both are neck-and-neck — HasData: Structured Web Data APIs and Open VSX Registry 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, HasData: Structured Web Data APIs or Open VSX Registry API?

Open VSX Registry API has the lower median latency in our checks — HasData: Structured Web Data APIs responds in 768 ms versus Open VSX Registry API at 245 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 HasData: Structured Web Data APIs and Open VSX Registry API need an API key?

Open VSX Registry API needs no key, while HasData: Structured Web Data APIs requires a free API key. If you want to start calling without signup, reach for Open VSX Registry API first.

Can I call HasData: Structured Web Data APIs and Open VSX Registry API from the browser?

Yes — both HasData: Structured Web Data APIs and Open VSX Registry API 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 HasData: Structured Web Data APIs and Open VSX Registry API free for commercial use?

HasData: Structured Web Data APIs 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.