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AlertChecker

Set up a plain-English alert and get emailed when it becomes true. Price drops, back-in-stock, share prices, weather events, and more — monitored by AI with live web access.

Finance
United Kingdom Estimated origin: United Kingdom

Added August 16, 2026 · Last analysed August 16, 2026 · via Hacker News

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 16 August 2026; the live site may have changed since.

AlertChecker has the basics covered well, with complete legal pages, a thorough launch checklist, and fast page loads. Worth fixing first: missing several security headers, tracking cookies set before any opt-in, and incomplete email security.

Launched on Hacker News on August 16, 2026. The site is served through Cloudflare, with a domain registered 8 weeks before launch. Our crawler found 11 technologies on this site, covering analytics, CDN, CSS frameworks, and DNS providers. The stack includes Next.js, React, and Tailwind CSS.

It's also running the same core stack as 5,034 other launches.

If you own this site, refresh the snapshot and see the full fix list any time →

Vibe Score 20 · Few AI signals
How much the site looks AI-generated. Informational pattern-match signal, not a verdict. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (11)

Infrastructure
CDN Cloudflare
DNS Cloudflare DNS
Email
Email forwarding Cloudflare Email Routing (2)
Build & Framework
CSS framework Tailwind CSS
Framework React
JavaScript library Zod
Meta-framework Next.js (5)
Analytics & Marketing
Analytics Google Analytics (5)
SEO Google Search Console
Tag management Google Tag Manager (3)
Business Tools
Error tracking Sentry (2)

Infrastructure

Network
AS13335 · US
DNS
Cloudflare DNS
Authoritative nameserver
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
Green hosting
Green hosted
Host runs on renewable energy. Data from The Green Web Foundation.
SSL Certificate
Google Trust Services
Valid 20 Jun 2026 to 18 Sep 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
1 month
Registered Jun 2026 · Cloudflare, Inc.

Email Security

SPF ~all Soft-fail (~all). Common and accepted.
?
DKIM Not detected at common selectors. Your provider may use a custom one.
DMARC Not published. Receivers fall back to permissive defaults.
?
MTA-STS Not deployed. Mail to your domain can be downgraded to plaintext en route.
?
TLS-RPT Not configured. You won't hear about silent SMTP TLS handshake failures.

Storage (3)

Cookies (2)
NameLifetimeDetected as
_ga 1y Google Analytics
_ga_7PG107B1KH 1y Google Analytics
Session storage (1)
KeySizeDetected as
sentryReplaySession 141 B Sentry

Readiness Breakdown How?

Custom title and meta description
Open Graph tags (title, image, description)
Twitter card meta tags
Canonical URL declared
Responsive viewport meta tag
Favicon present
Semantic HTML (nav, main, article)
Page title is 84 characters (advisory) Google only shows about 60 characters of the title in search results; aim for 50–60 to keep the whole thing visible.
Meta description is 173 characters (advisory) Google only shows about 155–160 characters of the description in desktop search results (less on mobile); anything past that won't appear.

Performance How?

135 ms Server response
82% Faster than peers
352 ms Largest contentful paint
0.00 Cumulative layout shift
726 KB Page weight
35 KB Image weight
2 Third-party domains
2 Console errors
1 Failed requests

1 images: 1 oversized

Broken first-party requests (1), worth fixing
  • 401 /api/auth/session

Indicative grade from a single automated render, not a substitute for Lighthouse or field data, and not part of the StackScope score.

Vibe Score Breakdown How?

SignalPoints
Placeholder branding +10
AI palette signals +5
AI writing signals +5

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.

AI Stance

No AI stance declared
llms.txt published
No AI bots blocked in robots.txt
? No directive declared
? None advertised

Well-Known Files

robots.txt
sitemap.xml (1 URLs)
security.txt
llms.txt
ads.txt
humans.txt
Privacy Policy
/privacy
Terms of Service
/terms
? Consent manager not detected
Analytics set tracking cookies on our visit, with no opt-in step.
86% unique

Security Headers (0/6)

Permissions-Policy experimental (check browser support)
X-XSS-Protection deprecated (use Content-Security-Policy)

Build

Code splitting
11 JS files
1 CSS files
2 Third-party domains

Brand Colours

App Manifest

AlertChecker
display: standalone 3 icons
theme #ffffff
Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.