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

earthsky.org

https://earthsky.org· First analyzed 14 Feb 2026· Updated 14 Feb 2026

Export

earthsky.org

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.26.10.45

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

alex.ns.cloudflare.com.nina.ns.cloudflare.com.

Performance

Page Speed

3 MB

110 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Detected API Sources

https://cdn.id5-sync.com/api/1...

Technology Stack

18 Technologies Detected

Plugins

Novashare Udesly Adapter Plugin Gravityview Featured Entries Advanced Ads Gravityview Advanced Ads Pro Bigscoots Cache

CSS Frameworks

Analytics

Meta Frameworks

Libraries

Fonts

Email Marketing

Advertising

CDN

SEO Analysis

D58/100

earthsky.orgearthsky.org

EarthSky | Updates on your cosmos and world

No description available for this page.

Title Length43 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

• Missing meta description - important for click-through rates
• Missing H1 tag - every page should have one H1
• Many images missing alt text (51/52)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

19 rules

Sitemap reference found

Sponsored

Security Score

36%Critical

Interactive

HTTPS

WAF

58d

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

13.01.2026

Valid Until

13.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

earthsky.org*.earthsky.org

SHA-256 Fingerprint

23:0A:42:F1:31:08:2F:C7:AF:A2:39:60:38:60:21:A8:D5:3C:27:F3...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

29819

cache-control

🟡 0s(public, s-maxage=31536000, max-age=0, must-revalidate)

cf-cache-status

HIT

cf-ray🇩🇪 Frankfurt

9cda0a481fff71a9-FRA

content-encoding

⚡ Brotli(br)

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)

aspmx2.googlemail.com

aspmx3.googlemail.com

alt2.aspmx.l.google.com

aspmx.l.google.com

+1 more

Domain Information

earthsky.org

Domain Age

25y 6m

Created

26.07.2000

Expires

26.07.2029

Last Updated

09.09.2025

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

consentmanager

Cookie Consent Banner

consentmanager

GDPR Indicators

Cookie consent banner detected

CMP: consentmanager

Typography & Readability

Open Sans + sans-serif

53/100

Readability

/30

20/40

12px · LH 1.67

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Open Sans

Sans

Body Font

sans-serif

Sans12px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

28px

22px

18px

12px

❌ Critical: 12px body text is too small. Increase to at least 14px.

✅ Optimal line spacing: 1.67 ratio ensures comfortable reading.

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

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

✅ Protected text on images: Using gradient for readability.

✅ Clean layout: Consistent left alignment throughout.

GGoogle Fonts

Business & Marketing Stack

4 Tools Detected

Enterprise

Marketing Automation

MailchimpSMB

Email marketing and automation platforms

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

earthsky.org(4)ads.adthrive.com(3)securepubads.g.doubleclick.net(2)googletagmanager.com(2)cdn.id5-sync.com(1)

Website Identity

earthsky.org

25 years old

GoDaddy.com, LLC📧 Google Workspace

Social Profiles

Facebook X (Twitter)Instagram

Sponsored

Last analyzed: 14 Feb 2026 at 05:07

Historical Analysis & Change Tracking