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Catherine Schulman Quotes vs Zen Quotes

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

APICatherine Schulman QuotesHEALTHY79Zen QuotesHEALTHY74
Uptime · 30d
Uptime · 90d98.0%90.2%
Uptime · 30d100%86.7%
P50 · ms31041657
P95 · ms49124714
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

Catherine Schulman Quotes vs Zen Quotes: common questions

Which is more reliable, Catherine Schulman Quotes or Zen Quotes?

On our scheduled checks, Catherine Schulman Quotes leads on measured uptime — Catherine Schulman Quotes at 98.0% versus Zen Quotes at 90.2% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, Catherine Schulman Quotes or Zen Quotes?

Zen Quotes has the lower median latency in our checks — Catherine Schulman Quotes responds in 3104 ms versus Zen Quotes at 1657 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 Catherine Schulman Quotes and Zen Quotes need an API key?

Neither needs a paid key — Catherine Schulman Quotes 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 Catherine Schulman Quotes and Zen Quotes from the browser?

Only Catherine Schulman Quotes 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 Catherine Schulman Quotes and Zen Quotes free for commercial use?

Catherine Schulman Quotes 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.