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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abebooks.com

https://abebooks.com· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

abebooks.com

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

99.83.223.161

Server Location

🇺🇸 Seattle, United States

ASN

AS16509

Organization

AWS Global Accelerator (GLOBAL)

Server

CDN

CloudFront

Nameservers

ns-1492.awsdns-58.org.ns-1700.awsdns-20.co.uk.ns-647.awsdns-16.net.ns-148.awsdns-18.com.

Performance

Page Speed

6 KB

64 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

React

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

CloudFront

Technology Stack

5 Technologies Detected

Analytics

Frameworks

Meta Frameworks

CSS Frameworks

SEO Analysis

A84/100

abebooks.comabebooks.com

AbeBooks | Shop for Books, Art & Collectibles

Discover a wonderful selection of rare and collectible books, used copies, signed and first editions and more, from booksellers located around the world.

Title Length45 chars

Recommended: 50-60 chars

Description Length153 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (74/104)

1 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

128 rules

Sitemap reference found

Sponsored

Security Score

61%Fair

Interactive

HTTPS

No WAF

200d

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

11.11.2025

Valid Until

31.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (5)

www.abebooks.comorigin-auth.www.abebooks.comwww-origin.abebooks.comabebooks.comauth.www.abebooks.com

SHA-256 Fingerprint

85:F7:BE:DB:C2:E5:07:22:D9:93:4C:5C:7A:AC:DE:92:99:65:13:4F...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

age

224

cache-control

🔵 Public(public)

content-encoding

📦 Gzip(gzip)

content-type

text/html;charset=UTF-8

date

Thu, 12 Feb 2026 18:40:53 GMT

expires

Thu, 12 Feb 2026 19:40:53 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

amazon-smtp.amazon.com

Domain Information

abebooks.com

Domain Age

30y 1m

Created

24.12.1995

Expires

07.06.2027

Last Updated

03.06.2025

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Data Protection Officer mentioned

Typography & Readability

Arial + Helvetica Neue

46/100

Readability

/30

32/40

14px · LH 1.45

Hierarchy

/20

13/25

1.71x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Arial

Sans24px

Body Font

Helvetica Neue

Sans14px

Contrast Ratio

Reading Comfort

Dual Sans-Serif

left aligned

24px

14px

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

✅ Optimal line spacing: 1.45 ratio ensures comfortable reading.

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

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

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

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

Buy on MyFonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

assets.prod.abebookscdn.com(16)assets.brightspot.abebooks.a2z.com(3)

Website Identity

abebooks.com

30 years old

CSC Corporate Domains, Inc.

Social Profiles

Facebook X (Twitter)Instagram

Sponsored

Last analyzed: 12 Feb 2026 at 18:41

Historical Analysis & Change Tracking