sbcl.org

https://sbcl.org· First analyzed 14 May 2026· Updated 14 May 2026

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sbcl.org

Mobile

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Hosting Provider

Cloudflare

cloudflare.com

IP Address

204.68.111.101

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Los Angeles, United States

ASN

AS209242

Organization

American Internet Services, LLC.

Server

Nginx

Nameservers

ns-145-c.gandi.net.ns-157-a.gandi.net.ns-62-b.gandi.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

493 ms10%

Speed Index

641 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

5 KB

4 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Cloudflare

Technology Stack

1 Technologies Detected

Web Servers

Nginx

SEO Analysis

D46/100

Meta Tags7/15

Content7/12

Headings6/8

Technical5/21

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

sbcl.orgsbcl.org

About - Steel Bank Common Lisp

No description available for this page.

Title Length30 chars

Recommended: 50-60 chars (~187px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description — important for click-through rates in SERPs
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

12 issues found

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Local SEO

Local Search Readiness

0/100

Poor

15 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

F32/100

Bot Access

20/25

Machine Read.

8/25

Schema Data

0/25

Citation

4/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

code blocks

Text ratio:41%

Words:173

Token eff.:Too Short

Sections/1K:11.6

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary54w

Descriptive Headingsavg 1.5w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

AI readiness recommendation preview...

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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

69/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

9/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

9/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

1/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

2 recommendations

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

75/100

A+

<0.001 g

CO₂e / view

4.8 KB

Page Weight

95%

Cleaner Than

New Visitor

<0.001 g

Returning (cached)

<0.001 g

Annual (10K/mo)

60 g

Emission Segments

Data Center

<0.001 g

Network

<0.001 g

Device

<0.001 g

Resource Breakdown

Images

1.7 KB

CSS

1.5 KB

HTML

1.6 KB

Green Hosting Verified

Cloudflare

Provider Match

2 recommendations

•Carbon footprint recommendation preview...

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Security Score

71%Good

Static / Informational

HTTPS

No WAF

40d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp384r1) (384 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

26.03.2026

Valid Until

24.06.2026

Subject Alternative Names (20)

amanda.orgbluefish.openoffice.nlcode.videlibri.decommunity.jedit.orgextensions.openoffice.orgextensions.services.openoffice.orgexult.infofreecol.org+12 more

SHA-256 Fingerprint

98:C8:DE:24:B2:62:A5:B9:22:72:58:15:FA:9C:89:75:95:16:85:19...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection

keep-alive

content-type

text/html

date

Thu, 14 May 2026 10:07:48 GMT

server

nginx

transfer-encoding

chunked

cache-control

🟡 1 Hours(max-age=3600)

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

spool.mail.gandi.net

fb.mail.gandi.net

Domain Information

sbcl.org

Domain Age

23y 1m

Created

16.04.2003

Expires

16.04.2027

Last Updated

13.02.2026

Registrar

Gandi SAS

DNSSEC

Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

32/100

Not Mobile Friendly

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

4 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Times New Roman

WCAG AAA

75/100

Readability

/30

22/30

16px · LH --

Hierarchy

/20

15/20

1.5x ratio

WCAG

/25

24/25

11.7:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Times New Roman

Serif24px

Body Font

Times New Roman

Serif16px

Contrast Ratio

11.7:1

WCAG AAA (≥7:1)

Reading Comfort

~33 CPL

Narrow lines

24px

16px

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

⚠️ Hard to read: Flesch score 48/100. Simplify sentences for wider reach.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 11.7:1).

⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

✅ Lean font stack: 1 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFontsFlesch 49

Color Palette

5 unique colors

3.47:1 AA Large Light

#ffffff

Background· 82.3%

#928789

Other· 2.3%

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Scripts & Styles

1 Resources

Scripts

Styles

Async

Defer

Top Script Sources

Website Identity

sbcl.org

23 years old

Location detected: 🇺🇸 United Statesvia ip

Gandi SAS

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Last analyzed: 14 May 2026 at 10:08

Historical Analysis & Change Tracking