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

apta.org

https://apta.org· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

apta.org

Sponsored

Hosting Provider

Episerver Stockholm

IP Address

217.114.94.2

Server Location

🇸🇪 Stockholm, Sweden

ASN

AS30811

Organization

Episerver Stockholm

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns12.dnsmadeeasy.com.ns14.dnsmadeeasy.com.ns15.dnsmadeeasy.com.ns13.dnsmadeeasy.com.+2 more

Performance

Page Speed

2.7 MB

88 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Tailwind CSS

CMS

Optimizely CMS (Episerver)

Infrastructure

Hosting

Episerver Stockholm

CDN

Cloudflare

Technology Stack

11 Technologies Detected

Analytics

Libraries

CSS Frameworks

Icon Libraries

Tag Managers

Advertising

CDN

Frameworks

SEO Analysis

C64/100

apta.orgapta.org

American Physical Therapy Association | APTA

Together we are building a community that advances the profession of physical therapy to improve the health of society.

Title Length44 chars

Recommended: 50-60 chars

Description Length119 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (15/15)

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

5,724 URLs

robots.txt

3 rules

Sponsored

Security Score

26%Critical

Interactive

HTTPS

WAF

64d

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+H3

Valid From

24.01.2026

Valid Until

24.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.apta.org

SHA-256 Fingerprint

8E:3A:06:74:5C:E0:C9:3C:09:20:1B:84:C1:5B:CC:F1:20:E9:6B:21...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-origin

access-control-expose-headers

Request-Context

alt-svc

h3=":443"; ma=86400

cache-control

🟣 Private(private, s-maxage=0)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9d05964c88c13825-FRA

Good Warning Issue

Email Infrastructure

Mimecast

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

us-smtp-inbound-1.mimecast.com

us-smtp-inbound-2.mimecast.com

Domain Information

apta.org

Domain Age

31y 4m

Created

25.10.1994

Expires

24.10.2026

Last Updated

08.12.2025

Registrar

NameCheap, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

APTA Sans

95/100

Readability

/30

40/40

16px · LH 1.68

Hierarchy

/20

25/25

2.5x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

APTA Sans

Sans40px

Body Font

APTA Sans

Sans16px

Contrast Ratio

Reading Comfort

~36 CPL

Needs attention

40px

22px

32px

16px

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

✅ Optimal line spacing: 1.68 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.5x larger than body text.

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

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

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

Buy on MyFonts

Business & Marketing Stack

6 Tools Detected

Enterprise

Behavior Analytics

HotjarMid-Market

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

LinkedIn AdsEnterprise

AdRollMid-Market

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

22 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(6)connect.facebook.net(3)tags.srv.stackadapt.com(1)s.adroll.com(1)snap.licdn.com(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn Threads

Sponsored

Last analyzed: 19 Feb 2026 at 11:57

Historical Analysis & Change Tracking