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Alan Perlis Quotes vs USGS Water Services

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

APIAlan Perlis QuotesNEW—USGS Water ServicesNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedPublic domain (U.S. Government work)
Free tierFree — limits not publishedFree — no API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Alan Perlis Quotes vs USGS Water Services: common questions

Which is more reliable, Alan Perlis Quotes or USGS Water Services?

On our scheduled checks, USGS Water Services leads on measured uptime — Alan Perlis Quotes at —% versus USGS Water Services 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 Alan Perlis Quotes and USGS Water Services need an API key?

Neither needs a paid key — Alan Perlis Quotes is callable with no signup, and USGS Water Services is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Alan Perlis Quotes and USGS Water Services from the browser?

Yes — both Alan Perlis Quotes and USGS Water Services 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 Alan Perlis Quotes and USGS Water Services free for commercial use?

Alan Perlis Quotes has unclear commercial terms, and USGS Water Services allows commercial use on its free tier. 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.