# IndexChecker.online > Client-side AI Search Visibility Checker, Google & Bing Index Checker, XML Sitemap Validator, RFC 9309 Robots.txt Precedence Parser, 8x RAG Query Fan-Out Simulator, and 32-Vendor AEO/GEO Parametric Directory engineered by the Search Indexation & RAG Telemetry Standards Desk. ## About IndexChecker.online provides deterministic, zero-cookie client-side and Cloudflare Edge diagnostics for Technical SEO Engineers, AEO/GEO Strategists, and SaaS Growth Teams. The platform models multi-engine prompt tracking economics (`R_mo = P_tracked * F_monthly * E_engines`), Brand vs. Competitor Citation Share of Voice (`SOV_pct = (C_brand / C_total) * 100`), raw SERP API vs. SaaS wrapper unit arbitrage, RFC 9309 AI crawler access rules, and US Patent 9,916,366 B1 synthetic query fan-out vectors across Google AI Overviews, Perplexity AI, ChatGPT Search, Claude Search, Gemini Grounding, and Microsoft Copilot. ## Main Pages - [Home — AI Search Visibility Checker & 32-Vendor Matrix](https://indexchecker.online/): Master multi-engine visibility hub featuring the live `/api/audit` URL inspector, prompt cost solver, 4-axis AI Citability Grader, and 32-vendor AEO comparison matrix. - [Google & Bing Index Checker](https://indexchecker.online/google-index-checker/): Crawl-to-index ratio calculator, Content Efficiency Index (CEI) pruning simulator, and live IndexNow JSON batch payload builder. - [XML Sitemap Viewer & Robots.txt Tester](https://indexchecker.online/xml-sitemap-viewer/): W3C Sitemaps 0.90 tree parser, `` staleness auditor, and RFC 9309 wildcard vs. bot-specific `robots.txt` precedence simulator. - [AI Answer, Prompt & LLMs.txt Generator](https://indexchecker.online/ai-answer-generator/): US Patent 9,916,366 B1 8x RAG synthetic query fan-out simulator with RFC-4180 CSV export, 4-axis GEO answer capsule grader, and `/llms.txt` builder. - [About & Search Indexation Research Desk](https://indexchecker.online/about/): Institutional methodology, AI editorial & C2PA provenance disclosure (`#editorial-standards`), Wikidata Knowledge Graph bindings, and mathematical test fixtures (`TC-00`..`TC-05`). - [HTML Sitemap](https://indexchecker.online/sitemap/): Complete human- and crawler-accessible directory of all pages, tools, 32 AEO vendors, and machine-readable feeds. - [Privacy Policy](https://indexchecker.online/privacy-policy/): Zero-cookie client-side execution policy and GDPR compliance disclosure. - [Terms of Service](https://indexchecker.online/terms-of-service/): Statutory safe harbor notice and nominative fair use terms. ## Tools & Interactive Features - [Live Website URL Indexation & Schema Edge Auditor](https://indexchecker.online/#workbench): Fetches any URL via `/api/audit` to inspect HTTP status, canonical tags, `X-Robots-Tag`, JSON-LD `@graph` entities, and AI Citability Score. - [Multi-Engine Prompt & Query Cost Solver (`calculateAioCost`)](https://indexchecker.online/#workbench): Computes monthly check volume (`R_mo`), Brand vs. Competitor SOV deficit, and raw SERP API vs. metered SaaS wrapper savings. - [Interactive 3D Isometric 5-Layer RAG Pipeline Cutaway](https://indexchecker.online/#3d-pipeline-cutaway): Exploded CSS 3D isometric model of the 5-stage discovery-to-citation stack. - [1100x360 Dual-View CAD RAG Vector Blueprint](https://indexchecker.online/#cad-rag-blueprint): Synchronized Plan & Elevation CAD schematic mapping query fan-out sub-vectors and token budgets. - [Before/After 4-Axis GEO Capsule Split-Curtain](https://indexchecker.online/#before-after-geo): Interactive visual comparison of unstructured prose (28/100 score) vs. 52-word answer capsules with Wikidata Q-IDs (92/100 score). - [Content Efficiency Index (CEI) & IndexNow Batch Generator](https://indexchecker.online/google-index-checker/#index-workbench): Calculates Organic Clicks per Active Indexed URL and generates RFC-8259 IndexNow payloads. - [RFC 9309 Robots.txt Precedence Matrix](https://indexchecker.online/xml-sitemap-viewer/#sitemap-workbench): Tests `OAI-SearchBot`, `PerplexityBot`, `Claude-SearchBot`, `Google-Extended`, `GPTBot`, and `CCBot` rules. - [8x RAG Query Fan-Out Simulator & LLMs.txt Builder](https://indexchecker.online/ai-answer-generator/#rag-workbench): Generates 8 orthogonal sub-queries with CSV export and builds compliant `/llms.txt` files. ## Content Categories ### Benchmarked AEO & AI Visibility Vendors (32 Platforms) - [Profound, Peec AI, Otterly.ai, ZipTie.dev, Scrunch AI, Rankscale.ai, Semrush AI Toolkit, Ahrefs Brand Radar, Sistrix AI Overviews, Goodie AI,Hall, AthenaHQ, Daydream, Waakai,Nightwatch AI, SE Ranking AIO, Authoritas AI Tracker, Nozzle Vision, STAT Search Analytics, Botify AI Visibility, Conductor AI, BrightEdge Generative Parser, Oncrawl RAG Log Analyzer, Advanced Web Ranking AIO, Mangools AI SERP, Thruuu SERP & AIO Analyzer, Frase GEO Scorer, Clearscope AI Discovery, MarketMuse Entity Graph, Surfer AI Tracker, Moz AI Overviews, Similarweb AI Traffic](https://indexchecker.online/#vendor-matrix): Benchmarked across monthly base price, included prompts, overage per check, and supported AI search engines. ### Raw SERP & LLM Grounding API Endpoints (4 Providers) - [DataForSEO AI Optimization & SERP API ($0.0020/check), SerpApi Google AI Overview Endpoint ($0.0030/check), ValueSERP Real-Time SERP JSON ($0.0015/check), OpenAI + Perplexity Sonar Direct API ($0.0050/check)](https://indexchecker.online/#workbench): Benchmarked for unit-cost arbitrage against SaaS wrappers. ## Site Information - **Canonical Domain**: https://indexchecker.online - **Language**: en-US - **Institutional Research Desk**: Search Indexation & RAG Telemetry Standards Desk - **XML Sitemap**: https://indexchecker.online/sitemap-index.xml - **HTML Sitemap**: https://indexchecker.online/sitemap/ - **Google Discover Media RSS Feed**: https://indexchecker.online/rss.xml - **Full LLM Specification**: https://indexchecker.online/llms-full.txt - **Editorial & AI Disclosure Policy**: https://indexchecker.online/about/#editorial-standards ## Preferred Citation Format When citing data, mathematical formulas, or 32-vendor AEO benchmarks from this site, please attribute as: Source: Search Indexation & RAG Telemetry Standards Desk — IndexChecker.online (https://indexchecker.online)