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Riddles API vs Zen Quotes

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

APIRiddles APIHEALTHY96Zen QuotesHEALTHY74
Uptime · 30d
Uptime · 90d100%90.2%
Uptime · 30d100%86.7%
P50 · ms3211657
P95 · ms14644714
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

Riddles API vs Zen Quotes: common questions

Which is more reliable, Riddles API or Zen Quotes?

On our scheduled checks, Riddles API leads on measured uptime — Riddles API at 100% 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, Riddles API or Zen Quotes?

Riddles API has the lower median latency in our checks — Riddles API responds in 321 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 Riddles API and Zen Quotes need an API key?

Neither needs a paid key — Riddles API 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 Riddles API and Zen Quotes from the browser?

Only Riddles API 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 Riddles API and Zen Quotes free for commercial use?

Riddles API 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.