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.

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merkur.de

https://merkur.de· First analyzed 14 Feb 2026· Updated 14 Feb 2026

Export

merkur.de

Mobile

Sponsored

Hosting Provider

Muenchener Zeitungs-Verlag GmbH & Co. KG

IP Address

193.218.202.89

Server Location

🇩🇪 Munich, Germany

ASN

AS34788

Organization

Muenchener Zeitungs-Verlag GmbH & Co. KG

Server

Nginx

CDN

Nameservers

anycast.regdns2.net.anycast.regdns1.de.

Performance

Page Speed

588 KB

76 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Muenchener Zeitungs-Verlag GmbH & Co. KG

CDN

Progressive Web App

Web ManifestApple Touch Icon

Detected API Sources

https://functions.adnami.io/ap...

Technology Stack

6 Technologies Detected

Analytics

CSS Frameworks

Tag Managers

Advertising

Web Servers

SEO Analysis

B76/100

merkur.demerkur.de

Merkur.de | News aus Politik, Sport, für Verbraucher, der Welt und ...

Aktuelle Nachrichten aus Bayern und der Welt – von Politik über Wirtschaft zu Verbraucher und Sport.

Title truncated.

Title Length77 chars

Recommended: 50-60 chars

Description Length100 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

38 URLs

robots.txt

271 rules

Sitemap reference found

Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

67d

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

22.01.2026

Valid Until

22.04.2026

Subject Alternative Names (20)

clicks.mailings.merkur.declicks.mitteilungen.merkur.dedachauer-nachrichten.dedachauernachrichten.dedorfener-anzeiger.dedorfeneranzeiger.deebersberger-zeitung.deebersbergerzeitung.de+12 more

SHA-256 Fingerprint

E2:89:A0:0A:40:F0:71:4F:9C:35:19:C4:72:CC:A2:0C:A6:B0:EE:3D...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

age

283

cache-control

🔴 No Cache(public, max-age=180, no-cache, no-store, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-language

content-type

text/html;charset=utf-8

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

merkur-de.mail.protection.outlook.com

Domain Information

merkur.de

Last Updated

03.01.2024

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Data Protection Officer mentioned

Typography & Readability

Georgia + Arial

39/100

Readability

/30

17/40

14px · LH 2.43

Hierarchy

/20

15/25

1x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

17/20

System fonts

Heading Font

Georgia

Serif14px

Body Font

Arial

Sans14px

Contrast Ratio

Reading Comfort

Serif Headlines + Sans Body

left aligned

14px

24px

14px

Minor Third

Scale

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

⚠️ Wide line spacing (2.43). Consider 1.4-1.8 for better flow.

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

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

⚠️ Risky: Text appears on background images without overlay protection.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

OutbrainMid-Market

Ad platforms and retargeting pixels

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

25 Resources

Scripts

Styles

Async

Defer

Top Script Sources

idcdn.de(6)cdntrf.com(3)data-f1e447fbcf.merkur.de(2)cl.k5a.io(2)cdn.opencmp.net(2)

Website Identity

Facebook Instagram

Sponsored

Last analyzed: 14 Feb 2026 at 01:11

Historical Analysis & Change Tracking