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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icecast.org

https://icecast.org· First analyzed 20 Feb 2026· Updated 20 Feb 2026

Export

icecast.org

Mobile

Sponsored

Hosting Provider

University of Oregon

IP Address

140.211.166.31

Server Location

🇺🇸 Corvallis, United States

ASN

AS3701

Organization

University of Oregon

Server

Nginx

Nameservers

ns1.xiph.org.ns0.xiph.org.

Performance

Page Speed

248 KB

4 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

University of Oregon

Technology Stack

1 Technologies Detected

Web Servers

Nginxv1.22.1

SEO Analysis

D58/100

icecast.orgicecast.org

Icecast

No description available for this page.

Title Length7 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

Sponsored

Security Score

76%Good

Static / Informational

HTTPS

No WAF

82d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

12.02.2026

Valid Until

13.05.2026

Subject Alternative Names (2)

icecast.orgwww.icecast.org

SHA-256 Fingerprint

6B:B7:64:39:EE:37:6B:9A:FF:6B:58:B2:13:D5:8F:A9:09:AF:80:75...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-type

text/html

date

Fri, 20 Feb 2026 08:23:19 GMT

etag

W/"695d7010-1fe2"

last-modified

Tue, 06 Jan 2026 20:26:56 GMT

server

nginx/1.22.1

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

smtp.osuosl.org

Domain Information

icecast.org

Domain Age

26y 11m

Created

10.03.1999

Expires

10.03.2027

Last Updated

18.02.2026

Registrar

Domain.com - Network Solutions, LLC

DNSSEC

Not Enabled

Typography & Readability

FiraSans

76/100

Readability

/30

40/40

16px · LH 1.60

Hierarchy

/20

18/25

2x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

FiraSans

Sans32px

Body Font

FiraSans

Sans16px

Contrast Ratio

Reading Comfort

~35 CPL

Needs attention

32px

24px

20px

16px

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

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

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

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

⚠️ Cramped layout: 14 elements lack adequate spacing.

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Scripts & Styles

1 Resources

Scripts

Styles

Async

Defer

Top Script Sources

Sponsored

Last analyzed: 20 Feb 2026 at 08:23

Historical Analysis & Change Tracking