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4dd.jp
FOURDIGIT Inc. | 株式会社フォーデジット
AI Agentic Readiness
5 / 30
agentic checks passed 36% readiness - how well this site can be read, trusted and transacted with by AI agents
Last checked
4dd.jp is live and passes 5 of 30 agentic-readiness checks (36%). It runs on gatsby on cloudflare over HTTPS.
For AI agents, 4dd.jp's strongest signals are fully indexable pages, an efficient render path, a complete sitemap, and language/locale signals. 291 URLs in sitemap.
Its main gaps are no structured tables or lists, few clear definitions, no Schema.org structured data, and shallow schema coverage. The weakest area is Machine extraction; addressing it first would raise this score the most.
Agent interaction
~Semantic HTML5 & AccessibilityOnly 29% of images have alt text
~Clean, Crawlable HTMLNo H1 tag(s) found (0)
~Extraction Friction ScoreFew pages have voice-friendly lead paragraphs
✓Indexability & Snippet EligibilityPages are indexable and snippet-eligible - the precondition for Google AI features is met
~Layout Stability & Responsiveness95/95 images lack explicit width/height - the most common cause of layout shift (CLS)
~Canonical URL Strategy2 canonical tags found - must have exactly one
~Page Speed: Page Size172KB of inline CSS/JS across the document
✗Speakable SchemaNo JSON-LD found across homepage - cannot assess speakable schema
AI discovery
✗llms.txt FileNo llms.txt file found at https://4dd.jp/llms.txt (HTML page served (not a valid text file))
~robots.txt for AI CrawlersNo explicit AI crawler rules in robots.txt
✓Sitemap Completeness291 URLs in sitemap
✗RSS/Atom FeedHomepage does not link to an RSS/Atom feed in <head>
✓Internationalization Signalsx-default hreflang is set (fallback language declared)
✗Content Licensing & AI PermissionsNo ai.txt file found
Trust & transparency
✗Entity Authority & E-E-A-TNo Organization schema to reinforce entity identity
✗Creator TransparencyCreator visibility is weak on content-like pages
~Methodology TransparencyLittle content-production or review transparency is visible
~AI Assistance DisclosureNo AI-assistance disclosure found on sampled pages (neutral - the engine cannot tell whether AI was used)
✗Visible Date SignalNo visible date signals found across homepage (no <time> elements, no JSON-LD dates, no article meta dates)
✓Title & Meta QualityTitles are present, unique, and well-sized, and pages carry meta descriptions
✗Content Freshness SignalsNo JSON-LD date properties (datePublished/dateModified) found across homepage
✗Author & Expert SchemaNo Person schema found across homepage
Every check is a verifiable fact about 4dd.jp's live pages. Scoring follows Google Lighthouse agentic-browsing: a fraction of concrete checks, not an invented 0-100.
How to improve for AI agents
The highest-impact changes to make 4dd.jp more agent-ready, in priority order.
1 Add structured tables and lists critical impactmedium effort
Present 4dd.jp's comparison and spec data as real HTML tables and lists agents can extract.
