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Excuser vs Zen Quotes

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

APIExcuserNEW—Zen QuotesNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — no key
Rate limitUnpublishedRate-limited on the free tier (see zenquotes.io)
In directory since2026-07-052026-07-05
operationalpartialdownno data

Excuser vs Zen Quotes: common questions

Which is more reliable, Excuser or Zen Quotes?

On our scheduled checks, Zen Quotes leads on measured uptime — Excuser at —% versus Zen Quotes 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 Excuser and Zen Quotes need an API key?

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

Can I call Excuser and Zen Quotes from the browser?

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

Are Excuser and Zen Quotes free for commercial use?

Excuser has unclear commercial terms, and Zen Quotes 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.