Onside Arena

AI Fantasy Premier League — projections, captain picks, set-piece intel and a multi-week squad optimiser. Validated on 50k+ predictions.

Added August 11, 2026 · Last analysed August 11, 2026 · via

Own this Launch?

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

Onside Arena scores highly overall, with a thorough launch checklist and clean crawl signals. Main gaps: no Content-Security-Policy, incomplete legal pages, and incomplete email security.

Launched on Product Hunt on August 11, 2026. The site is hosted on Railway and served through Cloudflare, with a domain registered 3 months before launch. The crawl picked up 19 technologies on this site, covering frameworks, analytics, APIs, and CDN. The stack includes Capacitor, Next.js, and React.

For context, it's the only launch we've crawled on this exact stack and more locked down than the typical Product Hunt launch.

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

8.5

StackScope Score

Excellent

100/100 Launch Readiness

Launch ready

5/6 Security Headers

Strong

2/3 Legal

Partial

2/2 Crawl files

Complete

92/100 Performance

Fast

Vibe Score 25 · Some 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 (19) · Indie stack

Infrastructure

CDN	Cloudflare
DNS	Cloudflare DNS
Hosting	Railway
Protocol	HTTP/3
Security	HSTS

Business email	Google Workspace (2)
Email forwarding	Cloudflare Email Routing
Email marketing	Brevo
Transactional email	Resend

Build & Framework

API	Wikimedia
CSS framework	Tailwind CSS
Font	Google Fonts
Framework	Capacitor
Framework	React
Meta-framework	Next.js (4)

Analytics & Marketing

Analytics	Google Analytics (3)
SEO	Google Search Console (2)
Tag management	Google Tag Manager (3)

Business Tools

Error tracking	Sentry

Infrastructure

Network

CLOUDFLARENET - Cloudflare, Inc., US

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

Let's Encrypt

Valid 2 Jul 2026 to 30 Sep 2026

Certificate as captured in this snapshot, not a live check.

Domain Age

3 months

Registered May 2026 · Cloudflare, Inc.

Email Security

✓

SPF ~all Soft-fail (~all). Common and accepted.

✓

DKIM Detected via known email provider

✗

DMARC p=none None (p=none). Monitoring only.

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 (2)

Cookies (2)

Name	Lifetime	Detected as
NetworkProbeLimit	1h	-
WMF-Uniq	12mo	Wikimedia

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 64 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 194 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?

283 ms Server response

55% Faster than peers

644 ms Largest contentful paint

0.05 Cumulative layout shift

1.7 MB Page weight

128 KB Image weight

4 Third-party domains

1 Console errors

1 Failed requests

⚠ 5 images: 5 oversized

Broken first-party requests (1), worth fixing

401 /api/account/pins

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?

Signal	Points
AI palette signals	+5
AI writing signals	+5
AI typography signals	+15

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

Welcomes AI crawlers

✓ llms.txt published

✓ No AI bots blocked in robots.txt

Content-Signal

? No directive declared

Link headers

? None advertised

Well-Known Files

✓ robots.txt

✓ sitemap.xml (1476 URLs)

✗ security.txt

✓ llms.txt

✗ ads.txt

✗ humans.txt

Legal

? Privacy Policy not detected

✓ Terms of Service

/player/tosin-147

? Analytics present, but it set no tracking cookies on our visit (it may be opt-in-gated).

Security Headers (5/6)

✓

Referrer-Policy

✓

X-Frame-Options

✓

Permissions-Policy experimental (check browser support)

✓

X-Content-Type-Options

✗

Content-Security-Policy

✓

Strict-Transport-Security

–

X-XSS-Protection deprecated (use Content-Security-Policy)

Build

✓ Code splitting

15 JS files

2 CSS files

4 Third-party domains

Brand Colours

App Manifest

Onside

display: standalone 3 icons

theme #c9ff3d

sports lifestyle entertainment

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.