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PyPI vs RSQ API

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

APIPyPIHEALTHY100RSQ APIHEALTHY91
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms46783
P95 · ms4461387
Authnonenone
CORSyesyes
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

PyPI vs RSQ API: common questions

Which is more reliable, PyPI or RSQ API?

Both are neck-and-neck — PyPI and RSQ 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, PyPI or RSQ API?

PyPI has the lower median latency in our checks — PyPI responds in 46 ms versus RSQ API at 783 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 PyPI and RSQ API need an API key?

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

Can I call PyPI and RSQ API from the browser?

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

Are PyPI and RSQ API free for commercial use?

PyPI has unclear commercial terms, and RSQ 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.