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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amsterdam.nl

https://amsterdam.nl· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

amsterdam.nl

Sponsored

Hosting Provider

Gemeente Amsterdam

IP Address

46.17.24.110

Server Location

🇳🇱 Amsterdam, The Netherlands

ASN

AS1136

Organization

Gemeente Amsterdam

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

a11-64.akam.net.a12-67.akam.net.a6-64.akam.net.a26-65.akam.net.+2 more

Performance

Page Speed

2.2 MB

62 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Gemeente Amsterdam

CDN

Cloudflare

Technology Stack

3 Technologies Detected

CSS Frameworks

Tailwind CSS

Analytics

Matomo

CDN

Cloudflare

SEO Analysis

D56/100

amsterdam.nlamsterdam.nl

Home | Gemeente Amsterdam

Officiële site van de gemeente Amsterdam met informatie over onze diensten en het bestuur.

Title Length25 chars

Recommended: 50-60 chars

Description Length90 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (4/4)

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

4,552 URLs

robots.txt

128 rules

Sitemap reference found

Sponsored

Security Score

71%Good

Interactive

HTTPS

WAF

75d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Ireland Limited

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

01.04.2025

Valid Until

02.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

www.amsterdam.nlamsterdam.nlapim-poc.amsterdam.nlapim-poc.developer.amsterdam.nlapim-poc.management.amsterdam.nlapimpoc.portal.amsterdam.nlapim-poc.scm.amsterdam.nlactiviteiten.amsterdam.nl+12 more

SHA-256 Fingerprint

8A:76:82:C2:87:0D:37:7F:67:4B:77:95:16:69:71:C0:EA:E9:B7:AB...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

date

Mon, 16 Feb 2026 20:23:52 GMT

content-type

text/html; charset=utf-8

cache-control

🟡 4 Hours(public, max-age=14400, s-maxage=3600)

expires

Mon, 16 Feb 2026 18:30:02 GMT

last-modified

Fri, 13 Feb 2026 08:50:00 GMT

vary

Origin, Accept-Encoding

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

amsterdam-nl.mail.protection.outlook.com

Domain Information

amsterdam.nl

Domain Age

32 years

Created

25.01.1994

Last Updated

21.11.2025

Registrar

KPN

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Arial

85/100

Readability

/30

40/40

20px · LH 1.80

Hierarchy

/20

15/25

0.8x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Arial

Sans16px

Body Font

Arial

Sans20px

Contrast Ratio

Reading Comfort

~35 CPL

Needs attention

16px

32px

20px

Octave

Scale

✅ Excellent readability: 20px body text is ideal for all devices.

✅ Optimal line spacing: 1.80 ratio ensures comfortable reading.

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

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

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

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

Buy on MyFonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(15)dap.amsterdam.nl(2)siteimproveanalytics.com(1)omnichanneliv.my.site.com(1)js.cobrowse.io(1)

Website Identity

Facebook Instagram LinkedIn

Sponsored

Last analyzed: 16 Feb 2026 at 20:24

Historical Analysis & Change Tracking