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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marginalrevolution.com

https://marginalrevolution.com· First analyzed 22 Apr 2026· Updated 22 Apr 2026

Export

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.18.9.34

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

aria.ns.cloudflare.com.arch.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

328 ms10%

Speed Index

426 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

24 KB

32 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

CMS

WordPress

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Technology Stack

14 Technologies Detected

Plugins

Jetpack

Google Analytics For Wordpress

Endless_Thread

Yoast SEO

Libraries

jQueryv3.7.1

Underscore.js Moment.js

CSS Frameworks

Analytics

Icon Libraries

Fonts

CDN

SEO Analysis

B77/100

Meta Tags11/15

Content12/12

Headings3/8

Technical21/25

E-E-A-T3/7

Images4/7

Links5/5

URL5/5

Social4/5

Freshness2/4

Mobile4/4

Indexability3/3

marginalrevolution.commarginalrevolution.com

Marginal REVOLUTION - Small Steps Toward A Much Better World

Small Steps Toward A Much Better World

Title Length60 chars

Recommended: 50-60 chars (~378px / 580px)

Description Length38 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (7/8) — critical for accessibility and SEO

7 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

9 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

17/100

Poor

5 11 1

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

D52/100

Bot Access

20/25

Machine Read.

10/25

Schema Data

4/25

Citation

18/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

blockquotesnavheader/footer

Text ratio:16%

Words:3,072

Token eff.:Good

Sections/1K:4.9

Depth:3/5

Structured Data

3 JSON-LD

WebSiteBreadcrumbListSearchAction

Citation Readiness

Opening Summary26w

Descriptive Headingsavg 4.5w

Canonical URL

Open Graph3/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (7)

AI readiness recommendation preview...

Upgrade to view recommendations

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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

75/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

13/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

10/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

11/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

6/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

3 recommendations

•Accessibility recommendation preview...

Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

87/100

A+

3 mg

CO₂e / view

24.3 KB

Page Weight

95%

Cleaner Than

New Visitor

3 mg

Returning (cached)

1 mg

Annual (10K/mo)

300 g

Emission Segments

Data Center

<0.001 g

Network

<0.001 g

Device

2 mg

Resource Breakdown

HTML

24.3 KB

Green Hosting Verified

Cloudflare

GWF Verified

2 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

31%Critical

Interactive

HTTPS

WAF

31d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

23.02.2026

Valid Until

24.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

marginalrevolution.com*.marginalrevolution.com

SHA-256 Fingerprint

F5:39:3B:14:1B:B5:17:72:01:87:7F:96:0A:D6:2A:ED:F8:5E:83:AD...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 600s(max-age=600, must-revalidate)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9f07136f2c4b690f-FRA

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Wed, 22 Apr 2026 19:36:11 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

Domain Information

marginalrevolution.com

Domain Age

22y 8m

Created

18.08.2003

Expires

18.08.2029

Last Updated

13.07.2024

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

75/100

Mobile Friendly1 breakpoint

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1

1 recommendation

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Roboto Flex + Merriweather

WCAG Partial

62/100

Readability

/30

22/30

15px · LH 1.73

Hierarchy

/20

8/20

WCAG

/25

18/25

3.02:1 min contrast

Performance

/25

14/25

3 fonts · 4 req

Heading Font

Roboto Flex

Sans

Body Font

Merriweather

Serif15px

Contrast Ratio

3.02:1

Below AA

Reading Comfort

~47 CPL

Optimal (45–75)

24px

16px

15px

⚠️ Small text: 15px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line length: ~47 chars/line (ideal 45–75 CPL).

⚠️ Hard to read: Flesch score 46/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 0 elements below WCAG AA threshold (min 3.0:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ Smart font loading: font-display: swap prevents invisible text during load (FOIT).

GGoogle FontsFlesch 46

Color Palette

8 unique colors

Light

#ffffff

Background· 88.1%

#b2c6d6

Primary· 2.3%

#684f62

Secondary· 1.9%

#8d9ec2

Secondary· 1.6%

#a9a9ba

Secondary· 1.6%

#eaf0f0

Secondary· 1.5%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

19 Resources

Scripts

Styles

Async

Defer

Top Script Sources

marginalrevolution.com(11)googletagmanager.com(1)challenges.cloudflare.com(1)stats.wp.com(1)

Website Identity

Marginal REVOLUTION - Small Steps Toward A Much Better World

Small Steps Toward A Much Better World

atabarro@gmu.edu

marginalrevolution.com/

22 years old

Tyler Cowen & Alexander Tabarrok

Location detected: 🇨🇦 Canadavia ip

GoDaddy.com, LLCen-US

Social Profiles

Facebook X (Twitter)Instagram GitHub

Sponsored

Last analyzed: 22 Apr 2026 at 19:37

Historical Analysis & Change Tracking