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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biodiversitylibrary.org

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

Export

Sponsored

Hosting Provider

Smithsonian Institution

IP Address

160.111.244.19

Server Location

🇺🇸 Washington, United States

ASN

AS25829

Organization

Smithsonian Institution

Nameservers

a11-67.akam.net.a26-66.akam.net.a28-65.akam.net.a9-64.akam.net.+2 more

Performance

Page Speed

428 KB

64 requests

Image Optimization

Uploadcare

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Smithsonian Institution

Technology Stack

5 Technologies Detected

Analytics

Libraries

Other

CSS Frameworks

SEO Analysis

D58/100

biodiversitylibrary.orgbiodiversitylibrary.org

Biodiversity Heritage Library

The Biodiversity Heritage Library works collaboratively to make biodiversity literature openly available to the world as part of a global biodiversity commun...

Description truncated.

Title Length29 chars

Recommended: 50-60 chars

Description Length161 chars

Recommended: 120-160 chars

Issues (0)

6 issues found

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Crawlability

Sitemap

robots.txt

60 rules

Sponsored

Security Score

41%Poor

Interactive

HTTPS

No WAF

331d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Internet2

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

16.01.2026

Valid Until

16.01.2027

OCSP Stapling

Enabled

Subject Alternative Names (20)

misc.si.edu*.nisbase.orgabout.biodiversitylibrary.orgadmin.biodiversitylibrary.orgbeta.admin.biodiversitylibrary.orgbeta.biodiversitylibrary.orgbiodiversitylibrary.orgbiogeodb.stri.si.edu+12 more

SHA-256 Fingerprint

24:F6:8C:74:C7:12:61:8E:A4:A8:2A:C1:C2:22:D6:82:3B:CD:9A:B6...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟣 Private(private)

content-security-policy

frame-ancestors 'self'

content-type

text/html; charset=utf-8

date

Thu, 19 Feb 2026 14:19:19 GMT

transfer-encoding

chunked

x-server-name

BHL1

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

MX Records (5)

alt1.aspmx.l.google.com

alt2.aspmx.l.google.com

aspmx.l.google.com

aspmx2.googlemail.com

+1 more

Domain Information

biodiversitylibrary.org

Domain Age

18y 10m

Created

12.04.2007

Expires

12.04.2030

Last Updated

19.02.2026

Registrar

Network Solutions, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Typography & Readability

Georgia

68/100

Readability

/30

32/40

14px · LH 1.57

Hierarchy

/20

13/25

1.57x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Georgia

Serif22px

Body Font

Georgia

Serif14px

Contrast Ratio

Reading Comfort

~53 CPL

Optimal (45–75)

22px

18px

28px

20px

14px

Minor Second

Scale

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

✅ Optimal line spacing: 1.57 ratio ensures comfortable reading.

✅ Good hierarchy: Clear distinction between headlines and 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.

✅ Protected text on images: Using gradient for readability.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Privacy & Cookies

CookiebotMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(7)static.fundraiseup.com(6)cdn.fundraiseup.com(1)googletagmanager.com(1)ajax.googleapis.com(1)

Website Identity

Facebook Instagram Bluesky

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Last analyzed: 19 Feb 2026 at 14:19

Historical Analysis & Change Tracking