The homepage resolves, connects, returns HTTP 200 OK, exposes a canonical URL, and is not blocked by robots.txt.
Signal weight
20/20
Pass
Evidence
- url
- https://fourline.ai/
- finalUrl
- https://fourline.ai/
- status
- 200
Public AI visibility report
fourline.aiAI visibilityNeeds Work
This site has a useful foundation, but important gaps still limit AI readability.
Key strengths include homepage access and crawler policy, while AI guidance file and page structure need attention.
Recommended next step
publish an AI guidance file as text or markdown with more than 200 characters, markdown headings, and at least one absolute URL.
Overall score
60/100
Needs WorkWhat happens next
Monitor this score as your site changes
Weekly checks catch robots, sitemap, schema, and content regressions before AI systems stop reusing your pages.
// score breakdown
Points by check
8 checks
Crawlability20/20PASS
Robots.txt15/15PASS
llms.txt0/15FAIL
Sitemap10/10PASS
Markdown support15/15PASS
Semantic HTML0/10FAIL
Structured data0/10FAIL
Content signals0/5FAIL
4pass0warn4fail
Public link
llmscan.dev/scan/_mMEhD357viWilWg9hJ98
Signals checked
8 AI visibility signals
Fix bundle
4 copy-ready files
Share badge
Needs Work · 60/100Add a polished proof badge
A compact badge for footer, press, or trust sections that links visitors to this public report.
Embed codellmscan.dev/scan/_mMEhD357viWilWg9hJ98
<a href="https://www.llmscan.dev/scan/_mMEhD357viWilWg9hJ98"
target="_blank"
rel="noopener"
>
<img
src="https://www.llmscan.dev/scan/_mMEhD357viWilWg9hJ98/badge.png"
alt="LLM Scan AI visibility score badge"
width="460"
height="120"
style="width: 260px; max-width: 100%; height: auto;"
/>
</a>L
LLM Scan
Needs Work
Score
60/100
Share your score
Post the public report with: “We scored 60/100 for AI-readability.”
Download fixes
Grab generated files and implementation notes for the highest-impact gaps.
Rescan weekly
Save this domain to catch regressions after content, sitemap, or robots changes.
Monitor weekly// signal breakdown
8 signals AI systems depend on
robots.txt allows crawler access and includes Sitemap references.
Signal weight
15/15
Pass
Evidence
- robotsTxtUrl
- https://fourline.ai/robots.txt
- exists
- true
- rawRobotsTxt
- User-agent: * Allow: / Sitemap: https://fourline.ai/sitemap.xml
No llms.txt file was found for this site.
Signal weight
0/15
Fail
Evidence
- llmsTxtUrl
- https://fourline.ai/llms.txt
- present
- false
- accessible
- false
Recommendation
Next step: Publish /llms.txt as text or markdown with more than 200 characters, markdown headings, and at least one absolute URL.The sitemap.xml file is valid and contains URL entries.
Signal weight
10/10
Pass
Evidence
- sitemapUrl
- https://fourline.ai/sitemap.xml
- sitemapUrls
- [https://fourline.ai/sitemap.xml]
- robotsSitemapUrls
- []
The homepage returns markdown content when requested with Accept: text/markdown, giving AI systems a cleaner text representation with less navigation chrome to parse.
Signal weight
15/15
Pass
Evidence
- url
- https://fourline.ai/
- acceptHeader
- text/markdown
- status
- 200
The homepage HTML is missing important title, metadata, structure, content, or link text signals.
Signal weight
0/10
Fail
Evidence
- url
- https://fourline.ai/
- quality
- poor
- score
- 43
Recommendation
Next step: Shorten the meta description to 160 characters or fewer. Use exactly one h1 element and move secondary section titles to h2-h6. Avoid skipped heading levels so sections progress from h1 to h2 to h3 without gaps. Add missing semantic elements: main, article, footer.No JSON-LD, Microdata, or RDFa structured data was found on the page.
Signal weight
0/10
Fail
Evidence
- url
- https://fourline.ai/
- quality
- none
- hasStructuredData
- false
Recommendation
Next step: Add JSON-LD structured data with Organization or WebSite schema so AI systems can identify the site owner or website entity.Content-Signal directive not detected in headers, HTML metadata, or robots.txt.
Signal weight
0/5
Fail
Evidence
- url
- https://fourline.ai/
- hasContentSignals
- false
- hasContentSignalHeader
- false
Recommendation
Next step: Add the standard directive 'Content-Signal: ai-train=no, search=yes, ai-input=yes' to robots.txt, HTML metadata, or HTTP headers so AI systems can discover content usage preferences.What happens next
Keep watching this score
Scores move when sites and models change. This one was measured once, on Aug 7, 2026.
// generated fixes
Downloadable fix files
Preview the generated files below. Enter your email to reveal the full fixes, download the bundle, or copy the agent-ready implementation prompt.
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Fix planning from your scan
Implementation guidance
AI visibility monitoring
llms.txtMarkdown
# FourLine - Your Unified AI Workspace > Bring all your AI chats into one place. FourLine is a powerful browser extension that lets you use multiple AI services side-by-side in a unified workspace, supercharging your research, writing, and coding workflows. This llms.txt file summarizes the public, canonical resources that AI assistants and crawlers should use to understand this site. ## Site Overview - Canonical URL: https://fourline.ai/- Site type: websiterobots.txtTXT
# robots.txt additions# Copy these blocks into the existing robots.txt file. Keep current rules unless a note calls out a conflicting Disallow. # AI crawler access# Add explicit Allow rules for AI crawlers so public content permissions are clear.User-agent: GPTBotAllow: / User-agent: ChatGPT-UserAllow: /schema.jsonJSON
{ "@context": "https://schema.org", "@graph": [ { "@type": "Organization", "@id": "https://fourline.ai/#organization", "name": "FourLine - Your Unified AI Workspace", "description": "Bring all your AI chats into one place. FourLine is a powerful browser extension that lets you use multiple AI services side-by-side in a unified workspace, supercharging your research, writing, and coding workflows.", "url": "https://fourline.ai/",head metaHTML
# Content-Signal recommendations Use these directives to make AI-use preferences explicit for compliant crawlers and AI systems. They are advisory signals, so keep them aligned with robots.txt, terms, and access controls. ## Recommended values - ai-train=no: AI model training, fine-tuning, and dataset creation.- search=yes: AI search indexing, snippets, and discovery.- ai-input=yes: AI answer grounding, retrieval, and generated-response context.What happens next
Monitor this score as your site changes
Weekly checks catch robots, sitemap, schema, and content regressions before AI systems stop reusing your pages.