Payment Requests by WithUPI
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Added April 7, 2026
· Last analysed April 10, 2026 · via 
· 62% unique tagline
StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 10 April 2026; the live site may have changed since.
Payment Requests by WithUPI ships with the launch fundamentals in place, with complete legal pages, a thorough launch checklist, and clean crawl signals. What needs work: missing Permissions-Policy and Content-Security-Policy, tracking cookies set before any opt-in, and incomplete email security.
Launched on Product Hunt on April 7, 2026. The site is hosted on Vercel, with a domain registered 7 months before launch. The crawl picked up 16 technologies on this site, covering advertising, analytics, collaboration, and CSS frameworks. The stack includes Next.js, React, and Tailwind CSS.
For context, it's running the same core stack as 10,661 other launches and tighter on security headers than most Product Hunt launches.
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Tech Stack (16) · Indie stack
| DNS |
Cloudflare DNS
|
| Hosting |
Vercel
(2)
|
| Security | HSTS (2) |
| Business email |
Lark Suite Email
|
| Email marketing |
Brevo
|
| Transactional email |
Resend
|
| CSS framework |
Tailwind CSS
|
| Framework |
React
|
| Meta-framework |
Next.js
(5)
|
| Mobile |
Apple App Store
|
| UI library |
shadcn/ui
|
| Advertising |
Google Ads
|
| Analytics |
Google Analytics
(3)
|
| SEO |
Google Search Console
|
| Tag management |
Google Tag Manager
|
| Collaboration |
Lark Suite
(2)
|
Infrastructure
Email Security
Readiness Breakdown How?
Vibe Score Breakdown How?
| Signal | Points |
|---|---|
| AI CSS signals | +10 |
| AI copy signals | +5 |
| AI palette signals | +5 |
| AI writing signals | +3 |
| AI stack signals | +10 |
This score is based on structural patterns and is not definitive. Many legitimate sites may trigger signals, and AI-built sites may go undetected. It should be treated as an indicator, not a verdict.