Parameters
Methodology v4.7 · 48 parameters across 7 categories
Evidence classes
Every parameter carries one of these, describing the evidence that the signal affects how AI systems read a site — not how strongly it is scored. What the score does and does not prove →
- Official platform requirement
- Strong independent evidence
- Internal observed correlation
- Heuristic
- Experimental signal
- General web hygiene
48 parameters
- AI Crawler Access Controlcrawlability
- AI Opt-Out Signalscrawlability
- AI Usage Policycrawlability
- Search-Bot Network Reachabilitycrawlability
- Paywall and Login Detectioncrawlability
- robots.txt Accessibilitycrawlability
- IndexNow Adoptiondiscovery
- Internal Link Coveragediscovery
- Page Metadatadiscovery
- Sitemap Availabilitydiscovery
- Alt Text and Accessibility Labelscontent-structure
- Answer Block Shapecontent-structure
- Answer-first H2 Compliancecontent-structure
- Answer-oriented Content Structurecontent-structure
- Chunk Extractabilitycontent-structure
- Comparison Table Presencecontent-structure
- Dated Statistics Ratiocontent-structure
- Heading Hierarchy Qualitycontent-structure
- Multimedia Coveragecontent-structure
- Content Visibility Without JavaScriptcontent-structure
- Nosnippet Directive Detectioncontent-structure
- Paragraph Length Distributioncontent-structure
- Section Length Distributioncontent-structure
- Semantic HTML Structurecontent-structure
- TL;DR / Key Takeaways Sectioncontent-structure
- Action-Oriented APIai-signals
- Agent Onboarding Documentationai-signals
- AI Manifests Coverageai-signals
- API Auth Transparencyai-signals
- OpenAPI / API Discoverabilityai-signals
- API Schema Quality for Agent Consumptionai-signals
- Machine-Readable Capability Metadataai-signals
- llms.txt Presenceai-signalsexperimental
- Author Authority Signalsauthority
- Citation and Evidence Densityauthority
- Content Depthauthority
- Content Freshnessauthority
- HTTP Reachabilitytechnical-seo
- Core Web Vitals (Page Experience)technical-seo
- Security Headers Baselinetechnical-seo
- URL Stabilitytechnical-seo
- Entity Name Consistencyentity
- Entity Groundingentity
- FAQ Schema Detectionentity
- Structured Dataentity
Crawlability
- ai-crawler-access-controlOfficial platform requirementscore bands →
- ai-opt-out-signalsOfficial platform requirementscore bands →
- ai-usage-policyExperimental signalscore bands →
- bot-network-reachabilityStrong independent evidencescore bands →
- paywall-login-detectionHeuristicscore bands →
- robots-txt-accessibilityOfficial platform requirementscore bands →
Discovery & Metadata
- indexnow-adoptionOfficial platform requirementscore bands →
- internal-link-coverageStrong independent evidencescore bands →
- page-metadataStrong independent evidencescore bands →
- sitemap-availabilityOfficial platform requirementscore bands →
Content Structure
- accessibility-labelsGeneral web hygienescore bands →
- answer-block-shapeHeuristicscore bands →
- answer-first-complianceHeuristicscore bands →
- answer-structureHeuristicscore bands →
- chunk-extractabilityHeuristicscore bands →
- comparison-table-presenceHeuristicscore bands →
- dated-statistics-ratioHeuristicscore bands →
- heading-hierarchyHeuristicscore bands →
- multimedia-coverageHeuristicscore bands →
- no-js-contentStrong independent evidencescore bands →
- nosnippet-detectionOfficial platform requirementscore bands →
- paragraph-length-distributionHeuristicscore bands →
- section-length-distributionHeuristicscore bands →
- semantic-htmlHeuristicscore bands →
- tldr-sectionHeuristicscore bands →
AI-Specific Signals
- action-apiExperimental signalscore bands →
- agent-onboarding-docsExperimental signalscore bands →
- ai-manifests-coverageExperimental signalscore bands →
- api-auth-transparencyExperimental signalscore bands →
- api-discoverabilityExperimental signalscore bands →
- api-schema-quality-for-agentsExperimental signalscore bands →
- capability-metadataExperimental signalscore bands →
- llms-txt-presenceexperimentalExperimental signalscore bands →
- ucp-manifestExperimental signalscore bands →
Authority & Trust
- author-authorityHeuristicscore bands →
- citation-evidence-densityHeuristicscore bands →
- content-depthHeuristicscore bands →
- content-freshnessStrong independent evidencescore bands →
Technical SEO
- http-reachabilityOfficial platform requirementscore bands →
- page-experienceOfficial platform requirementscore bands →
- security-headers-baselineGeneral web hygienescore bands →
- url-stabilityStrong independent evidencescore bands →
Entity & Schema
- content-type-schema-matchOfficial platform requirementscore bands →
- entity-consistencyHeuristicscore bands →
- entity-groundingHeuristicscore bands →
- faq-schemaOfficial platform requirementscore bands →
- structured-dataOfficial platform requirementscore bands →
- structured-data-coverageOfficial platform requirementscore bands →