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

brainpickings.org

https://brainpickings.org· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

brainpickings.org

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.21.19.151

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

maciej.ns.cloudflare.com.carla.ns.cloudflare.com.

Performance

Page Speed

1.2 MB

83 requests

Image Optimization

Lazy LoadResponsiveJetpack Photon (WordPress)

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.8.3

cms

The Marginalianv1.0.0

by Armin Vit and John Ford

View Theme

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

7 Technologies Detected

Meta Frameworks

Astro

Libraries

jQueryv3.7.1

CSS Frameworks

Tailwind CSS

Fonts

Adobe Fonts (Typekit)

Email Marketing

Mailchimp

CDN

Cloudflare

Plugins

Jetpack

SEO Analysis

D56/100

brainpickings.orgbrainpickings.org

The Marginalian – Marginalia on our search for meaning.

No description available for this page.

Title Length55 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description - important for click-through rates

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

8 URLs

robots.txt

4 rules

Sitemap reference found

Sponsored

Security Score

26%Critical

Interactive

HTTPS

WAF

77d

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+H3

Valid From

04.02.2026

Valid Until

05.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

themarginalian.org*.themarginalian.org

SHA-256 Fingerprint

B8:F7:74:52:18:69:E0:FA:C4:E8:5F:7B:1A:68:81:DA:D5:36:5E:5A...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

🟡 3s(max-age=3, must-revalidate)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9cef2a6638b83683-FRA

content-encoding

zstd

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

alt1.aspmx.l.google.com

aspmx2.googlemail.com

alt2.aspmx.l.google.com

aspmx.l.google.com

+1 more

Domain Information

brainpickings.org

Domain Age

17y 6m

Created

15.08.2008

Expires

15.08.2032

Last Updated

09.08.2023

Registrar

Cloudflare, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Arial + serif

38/100

Readability

/30

20/40

14px · LH 1.60

Hierarchy

/20

18/25

2.06x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

10/20

4 fonts

Heading Font

Arial

Sans28px

Body Font

serif

Serif14px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

28px

20px

12px

14px

❌ Critical: 14px body text is too small. Increase to at least 14px.

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.1x larger than body text.

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

⚠️ Cramped layout: 26 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

AAdobe Fonts Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Advanced

Marketing Automation

MailchimpSMB

Email marketing and automation platforms

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

12 Resources

Scripts

Styles

Async

Defer

Top Script Sources

themarginalian.org(3)load.sumome.com(1)use.typekit.net(1)stats.wp.com(1)

Website Identity

brainpickings.org

17 years old

Cloudflare, Inc.📧 Google Workspace

Social Profiles

Facebook X (Twitter)Instagram

Sponsored

Last analyzed: 16 Feb 2026 at 18:39

Historical Analysis & Change Tracking