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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scientificamerican.com

https://scientificamerican.com· First analyzed 10 Feb 2026· Updated 10 Feb 2026

Export

Mobile

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Hosting Provider

Fastly, Inc.

IP Address

151.101.193.55

Server Location

🇨🇦 Montreal, Canada

ASN

AS54113

Organization

Fastly, Inc.

CDN

Fastly

Nameservers

ns-918.awsdns-50.net.ns-1137.awsdns-14.org.ns-1733.awsdns-24.co.uk.ns-265.awsdns-33.com.

Performance

Page Speed

829 KB

95 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Carrd

Technology Stack

5 Technologies Detected

Analytics

Meta Frameworks

CSS Frameworks

Tag Managers

SEO Analysis

A82/100

scientificamerican.comscientificamerican.com

Scientific American

Scientific American is the essential guide to the most awe-inspiring advances in science and technology, explaining how they change our understanding of the ...

Description truncated.

Title Length19 chars

Recommended: 50-60 chars

Description Length183 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

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Security Score

79%Good

Interactive

HTTPS

No WAF

36d

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

age

cache-control

🟡 360s(public, s-max-age=360, stale-while-revalidate=120, stale-if-...)

content-encoding

📦 Gzip(gzip)

content-length

67199

content-security-policy

frame-ancestors 'self'

Good Warning Issue

Typography & Readability

GT America + -apple-system

67/100

Readability

/30

32/40

16px · LH 1.30

Hierarchy

/20

8/25

1x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

17/20

System fonts

Heading Font

GT America

Sans16px

Body Font

-apple-system

Sans16px

Contrast Ratio

Reading Comfort

~41 CPL

Needs attention

16px

26px

24px

16px

Major Third

Scale

✅ Excellent readability: 16px body text is ideal for all devices.

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

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

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

⚠️ Cramped layout: 119 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

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Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Reviews & Social Proof

TrustpilotMid-Market

Customer reviews and testimonials

Sponsored

Scripts & Styles

16 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(2)googletagmanager.com(1)cmp.springernature.com(1)scientificamerican.com(1)idp_shim.sciam.com(1)

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Last analyzed: 10 Feb 2026 at 22:42

Historical Analysis & Change Tracking