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

hud.gov

https://hud.gov· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

hud.gov

Mobile

Sponsored

Hosting Provider

Department of Housing and Urban Development

IP Address

170.97.67.13

Server Location

🇺🇸 Clinton, United States

ASN

AS8076

Organization

Department of Housing and Urban Development

Server

Apache

CDN

Varnish

Nameservers

ns3.hud.gov.ns2.hud.gov.hudgater.hud.gov.ns4.hud.gov.+2 more

Performance

Page Speed

3.3 MB

30 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupal

Technology Stack

10 Technologies Detected

Analytics

CSS Frameworks

Libraries

Icon Libraries

Fonts

Web Servers

Languages

SEO Analysis

D41/100

hud.govhud.gov

HUD Home | HUD.gov / U.S. Department of Housing and Urban Developme...

No description available for this page.

Title truncated.

Title Length75 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description - important for click-through rates
• Missing H1 tag - every page should have one H1

7 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

53 rules

Sponsored

Security Score

56%Poor

Interactive

HTTPS

No WAF

308d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

12.12.2025

Valid Until

17.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (5)

www.hud.govhud.govblog.hud.govfhadirect.hud.govptp.hud.gov

SHA-256 Fingerprint

F1:F8:6C:E2:1E:0D:21:6E:54:A8:D8:50:40:DD:6C:52:18:BD:5F:8D...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

age

cache-control

🔵 1 Days(max-age=86400, public)

connection

keep-alive

content-length

152331

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

MX Records (1)

hud-gov.mail.protection.outlook.com

Domain Information

hud.gov

Domain Age

28y 4m

Created

02.10.1997

Expires

28.07.2026

Last Updated

25.11.2025

Registrar

get.gov

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Poppins + Work Sans

26/100

Readability

/30

20/40

12px · LH 1.50

Hierarchy

/20

8/25

WCAG

/25

5/15

Contrast: undefined

Performance

/25

10/20

3 fonts

Heading Font

Poppins

Sans

Body Font

Work Sans

Sans12px

Contrast Ratio

Reading Comfort

~49 CPL

Optimal (45–75)

26px

18px

12px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

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

✅ Optimal line length: ~49 characters per line is comfortable to read.

⚠️ Cramped layout: 9 elements lack adequate spacing.

GGoogle Fonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Sponsored

Scripts & Styles

12 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(2)resources.digital-cloud-gov.medallia.com(2)googletagmanager.com(1)cdn.gtranslate.net(1)hud.gov(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube

Sponsored

Last analyzed: 12 Feb 2026 at 13:57

Historical Analysis & Change Tracking