What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

Back to Search

transfermarkt.com

https://transfermarkt.com· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

transfermarkt.com

Sponsored

Hosting Provider

Base services

IP Address

5.159.57.195

Server Location

🇩🇪 Hamburg, Germany

ASN

AS59507

Organization

Base services

Server

Nginx

CDN

CloudFront

Nameservers

pns22.cloudns.net.pns23.cloudns.net.pns24.cloudns.net.pns21.cloudns.net.

Performance

Page Speed

5 KB

110 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Base services

CDN

CloudFront

Technology Stack

8 Technologies Detected

Libraries

Analytics

Frameworks

CSS Frameworks

Advertising

Web Servers

SEO Analysis

B72/100

transfermarkt.comtransfermarkt.com

Football transfers, rumours, market values and news | Transfermarkt

Transfermarkt - The football website for transfers, market values, rumours and stats

Title Length67 chars

Recommended: 50-60 chars

Description Length84 chars

Recommended: 120-160 chars

Issues (0)

4 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

27 rules

Allows all crawlers

Sponsored

Security Score

26%Critical

Interactive

HTTPS

No WAF

54d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

12.01.2026

Valid Until

12.04.2026

Subject Alternative Names (2)

*.transfermarkt.comtransfermarkt.com

SHA-256 Fingerprint

D0:B0:DC:19:32:E6:E0:E1:D8:3E:B9:0E:94:82:F8:A9:1C:E4:F0:BA...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-origin

age

cache-control

🟡 120s(public, max-age=120, must-revalidate, stale-while-revalidate...)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Mon, 16 Feb 2026 12:00:24 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

transfermarkt-com.mail.protection.outlook.com

Domain Information

transfermarkt.com

Domain Age

25y 1m

Created

28.12.2000

Expires

28.12.2026

Last Updated

29.12.2025

Registrar

InterNetX GmbH

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

Source Sans Pro + sans-serif

70/100

Readability

/30

32/40

14px · LH 1.60

Hierarchy

/20

15/25

1.43x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Source Sans Pro

Sans20px

Body Font

sans-serif

Sans14px

Contrast Ratio

Reading Comfort

~34 CPL

Needs attention

20px

24px

14px

Minor Third

Scale

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

✅ Good performance: Using 2 font families keeps load times fast.

✅ Consistent design: Single font family with weight variations is a modern best practice.

✅ Protected text on images: Using gradient for readability.

Buy on MyFontsVariable Fonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

tmssl.akamaized.net(11)tmsi.akamaized.net(7)cp.transfermarkt.com(1)cdn.privacy-mgmt.com(1)

Website Identity

Facebook X (Twitter)Instagram TikTok Telegram Threads

Sponsored

Last analyzed: 16 Feb 2026 at 12:00

Historical Analysis & Change Tracking