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Rejection Reason Generator vs Riddles API

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

APIRejection Reason GeneratorHEALTHY90Riddles APIHEALTHY96
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms690321
P95 · ms23451464
Authnonenone
CORSyesyes
HTTPSyesyes
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

Rejection Reason Generator vs Riddles API: common questions

Which is more reliable, Rejection Reason Generator or Riddles API?

Both are neck-and-neck — Rejection Reason Generator and Riddles 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, Rejection Reason Generator or Riddles API?

Riddles API has the lower median latency in our checks — Rejection Reason Generator responds in 690 ms versus Riddles API at 321 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 Rejection Reason Generator and Riddles API need an API key?

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

Can I call Rejection Reason Generator and Riddles API from the browser?

Yes — both Rejection Reason Generator and Riddles API 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 Rejection Reason Generator and Riddles API free for commercial use?

Rejection Reason Generator has unclear commercial terms, and Riddles 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.