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

cargo.site

https://cargo.site· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

cargo.site

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

23.20.133.242

Server Location

🇺🇸 Ashburn, United States

ASN

AS14618

Organization

AWS EC2 (us-east-1)

Server

cargo-router

Nameservers

ns-1748.awsdns-26.co.uk.ns-9.awsdns-01.com.ns-998.awsdns-60.net.ns-1296.awsdns-34.org.

Performance

Page Speed

33 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Cargo

Technology Stack

5 Technologies Detected

Analytics

CSS Frameworks

Tag Managers

Languages

SEO Analysis

C64/100

cargo.sitecargo.site

Cargo

Site builder for designers and artists

Title Length5 chars

Recommended: 50-60 chars

Description Length38 chars

Recommended: 120-160 chars

Issues (0)

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

27 rules

Sitemap reference found

Sponsored

Security Score

71%Good

Static / Informational

HTTPS

No WAF

160d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

29.06.2025

Valid Until

27.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

cargo.site*.cargo.site

SHA-256 Fingerprint

02:30:C5:D8:1F:2C:BE:17:BF:CA:18:FE:AF:E3:60:F6:FC:07:56:06...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

content-length

8098

content-type

text/html; charset=utf-8

date

Tue, 17 Feb 2026 07:30:58 GMT

server

cargo-router

x-cache-status

C0-HIT

x-debug-host

u.cargo.site

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

aspmx.l.google.com

alt3.aspmx.l.google.com

alt2.aspmx.l.google.com

alt1.aspmx.l.google.com

+1 more

Domain Information

cargo.site

Domain Age

7y 1m

Created

14.01.2019

Expires

14.01.2027

Last Updated

09.02.2026

Registrar

Tucows.com Co.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Typography & Readability

CargoDiatypeVariable

71/100

Readability

/30

32/40

15px · LH 1.65

Hierarchy

/20

11/25

1x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

CargoDiatypeVariable

Sans15px

Body Font

CargoDiatypeVariable

Sans15px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

15px

Minor Second

Scale

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

✅ Optimal line spacing: 1.65 ratio ensures comfortable reading.

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

✅ Good performance: Using 1 font families keeps load times fast.

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

✅ Clean layout: Consistent left alignment throughout.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Reddit PixelMid-Market

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

6 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(2)redditstatic.com(1)build.cargo.site(1)

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Last analyzed: 17 Feb 2026 at 07:31

Historical Analysis & Change Tracking