Observed arrival · 2026-09-24
Decline Decoder reads the fine print in payment failures
A payment-failure diagnostic that explains decline codes, advises whether and when to retry, and drafts a customer message.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Merchants and payments teams handling failed payments
- Worth noticing
- Its 50-scenario development set reports 100% cause and 98% retry-decision accuracy after reference lookup and written rules.
Field notes
The described reference combines codes from NPCI, ISO 8583, Razorpay, Cashfree, and Stripe, organizing them into 18 root causes. The project says an earlier single-prompt version sometimes invented answers for codes it should have refused; its revised lookup-first workflow is reported as avoiding those errors on the 50-scenario development set. The page also says three outdated retry rules were corrected after checking its sources.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue