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

bricklink.com

https://bricklink.com· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

bricklink.com

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

3.93.135.198

Server Location

🇺🇸 Ashburn, United States

ASN

AS14618

Organization

AWS EC2 (us-east-1)

Server

Nginx

CDN

Cloudflare

WAF

Cloudflare

Nameservers

nero.ns.cloudflare.com.anna.ns.cloudflare.com.

Performance

Page Speed

120 KB

80 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

Cloudflare

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

7 Technologies Detected

Libraries

jQuery

jQuery UI

Analytics

Facebook Pixel Matomo

CSS Frameworks

Tailwind CSS

Icon Libraries

Font Awesome

Web Servers

Nginxv1.28.0

SEO Analysis

D55/100

bricklink.combricklink.com

BrickLink - Buy and sell LEGO Parts, Sets and Minifigures

BrickLink® is the world's largest online marketplace to buy and sell LEGO® parts, Minifigures and sets, both new or used. Search the complete LEGO catalog & ...

Description truncated.

Title Length57 chars

Recommended: 50-60 chars

Description Length189 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (22/34)

6 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

23 rules

Sponsored

Security Score

71%Good

Interactive

HTTPS

No WAF

106d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

08.05.2025

Valid Until

03.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.bricklink.com*.prod.bricklink.com

SHA-256 Fingerprint

58:1B:21:DA:E7:E2:9F:01:DC:A6:2A:A0:46:9A:8D:91:9E:08:00:CB...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-cache, no-store)

content-encoding

📦 Gzip(gzip)

content-security-policy

frame-ancestors store.bricklink.com www.bricklink.com static...

content-type

text/html;charset=utf-8

date

Tue, 17 Feb 2026 06:17:23 GMT

expires

Thu, 01 Jan 1970 00:00:00 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

bricklink-com.mail.protection.outlook.com

Domain Information

bricklink.com

Domain Age

24 years

Created

28.01.2002

Expires

28.01.2027

Last Updated

24.01.2026

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Typography & Readability

Helvetica Neue

55/100

Readability

/30

32/40

14px · LH 1.50

Hierarchy

/20

20/25

1.8x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Helvetica Neue

Sans25px

Body Font

Helvetica Neue

Sans14px

Contrast Ratio

Reading Comfort

~53 CPL

Optimal (45–75)

25px

24px

17px

14px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Good hierarchy: Clear distinction between headlines and body text.

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

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

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

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

17 Resources

Scripts

Styles

Async

Defer

Top Script Sources

static.bricklink.com(4)static2.bricklink.com(3)cache2.bricklink.com(1)connect.facebook.net(1)bricklink.com(1)

Website Identity

bricklink.com

24 years old

CSC Corporate Domains, Inc.📧 Microsoft 365

Sponsored

Last analyzed: 17 Feb 2026 at 06:17

Historical Analysis & Change Tracking