[The Census](https://readinessindex.io/census) · [2026-Q4](https://readinessindex.io/census/2026-Q4) · [sp500](https://readinessindex.io/census/2026-Q4/sp500) [https://sandisk.com/](https://sandisk.com/) · ranked 401 in its cohort · 32 pages read · 51 tests · 19 September 2026 Scan # Sandisk Score 43/100 12 of 51 tests pass · 57 points still on the table You · 43 NOT READY 0–39 WEAK 40–59 ADEQUATE 60–74 STRONG 75–89 EXEMPLARY 90–99 We ran all 51 scored tests across 7 dimensions, against the 32 pages we read. Weak The fundamentals are in place and the machine-readable layer on top of them largely is not. Do these three first ## The fastest 7 points on this scan 1 +3 AIR-1.4 · small effort Content Signals declared in robots.txt No Content-Signal line in robots.txt. Missing: search, ai-input, ai-train. **Do this:** Declare a Content Signals position in robots.txt. 2 +2 AIR-2.2 · medium effort Progressive disclosure content ships in the initial HTML 0 of 29 pages ship every disclosure panel populated in the raw HTML. **Do this:** Render every panel and hide it with CSS. 3 +2 AIR-3.2 · small effort BreadcrumbList on every page below the homepage 0% of pages below the homepage carry a BreadcrumbList with at least two steps. **Do this:** Generate BreadcrumbList from the menu. Nine dimensions, most to least left on the table [Primary Indicators 13 left 17](https://readinessindex.io/tests#d-1) [Structured Data and the Entity Graph 13 left 2](https://readinessindex.io/tests#d-3) [Authorship, Provenance, Freshness 12 left 0](https://readinessindex.io/tests#d-5) [Rendering and Extraction 9 left 6](https://readinessindex.io/tests#d-2) [Crawl, Index and Licensing Hygiene 7 left 5](https://readinessindex.io/tests#d-4) [Alternate Representations 7 left 1](https://readinessindex.io/tests#d-7) [Agent Interfaces 5 left 3](https://readinessindex.io/tests#d-6) 32 pages crawled - [sandisk.com](https://sandisk.com/) - [www.sandisk.com](https://www.sandisk.com/) - [www.sandisk.com/product-portfolio/ssd/internal-ssd](https://www.sandisk.com/product-portfolio/ssd/internal-ssd) - [www.sandisk.com/product-portfolio/ssd/external-ssd](https://www.sandisk.com/product-portfolio/ssd/external-ssd) - [www.sandisk.com/product-portfolio/ssd/enterprise-ssd](https://www.sandisk.com/product-portfolio/ssd/enterprise-ssd) - [www.sandisk.com/tools/product-compare?ids=SDSP71500GAN-000E0:sandisk-optimus-gx-7100-internal-nvme-ssd,SDSNS2500GAB-000G0:sandisk-nas-600-sata-ssd,SDSP82100TAH-000E0:sandisk-optimus-gx-pro-8100-internal-nvme-ssd,SDSP81100TAH-000E0:sandisk-optimus-gx-pro-850x-internal-nvme-ssd](https://www.sandisk.com/tools/product-compare?ids=SDSP71500GAN-000E0:sandisk-optimus-gx-7100-internal-nvme-ssd,SDSNS2500GAB-000G0:sandisk-nas-600-sata-ssd,SDSP82100TAH-000E0:sandisk-optimus-gx-pro-8100-internal-nvme-ssd,SDSP81100TAH-000E0:sandisk-optimus-gx-pro-850x-internal-nvme-ssd) - [www.sandisk.com/product-portfolio/ssd](https://www.sandisk.com/product-portfolio/ssd) - [www.sandisk.com/solutions/gaming/desktop-laptop-gaming-storage-drives](https://www.sandisk.com/solutions/gaming/desktop-laptop-gaming-storage-drives) - [www.sandisk.com/solutions/digital-photography](https://www.sandisk.com/solutions/digital-photography) - [www.sandisk.com/solutions/backups/computer-backup-with-ssds](https://www.sandisk.com/solutions/backups/computer-backup-with-ssds) - [www.sandisk.com/solutions/iphone-external-storage](https://www.sandisk.com/solutions/iphone-external-storage) - [www.sandisk.com/solutions/external-storage-for-prores](https://www.sandisk.com/solutions/external-storage-for-prores) - [www.sandisk.com/solutions/network-attached-storage](https://www.sandisk.com/solutions/network-attached-storage) - [www.sandisk.com/solutions/enterprise-ssds](https://www.sandisk.com/solutions/enterprise-ssds) - [www.sandisk.com/support/category-selection?cat=solid-state-drives-ssd](https://www.sandisk.com/support/category-selection?cat=solid-state-drives-ssd) - [www.sandisk.com/solutions/solid-state-drives](https://www.sandisk.com/solutions/solid-state-drives) - [www.sandisk.com/solutions/ssd-vs-hdd](https://www.sandisk.com/solutions/ssd-vs-hdd) - [www.sandisk.com/solutions/thunderbolt-vs-usb-c](https://www.sandisk.com/solutions/thunderbolt-vs-usb-c) - [www.sandisk.com/solutions/what-is-nvme-ssd](https://www.sandisk.com/solutions/what-is-nvme-ssd) - [www.sandisk.com/topics/ssd](https://www.sandisk.com/topics/ssd) - [www.sandisk.com/tools/laptop-pc-ssd-finder](https://www.sandisk.com/tools/laptop-pc-ssd-finder) - [www.sandisk.com/product-portfolio/memory-cards/sd-cards](https://www.sandisk.com/product-portfolio/memory-cards/sd-cards) - [www.sandisk.com/product-portfolio/memory-cards/microsd-cards](https://www.sandisk.com/product-portfolio/memory-cards/microsd-cards) - [www.sandisk.com/product-portfolio/memory-cards/cfast-cfexpress-compactflash](https://www.sandisk.com/product-portfolio/memory-cards/cfast-cfexpress-compactflash) - [www.sandisk.com/tools/product-compare?ids=SDSQXFN-512G-GN4NN:sandisk-microsd-express-memory-card,SDSQXAV-512G-GN6MA:extreme-uhs-i-microsd,SDSQXCD-512G-GN6MA:extreme-pro-uhs-i-microsd,SDSQUAC-512G-GN6MA:ultra-uhs-i-microsd-150-mbps](https://www.sandisk.com/tools/product-compare?ids=SDSQXFN-512G-GN4NN:sandisk-microsd-express-memory-card,SDSQXAV-512G-GN6MA:extreme-uhs-i-microsd,SDSQXCD-512G-GN6MA:extreme-pro-uhs-i-microsd,SDSQUAC-512G-GN6MA:ultra-uhs-i-microsd-150-mbps) - [www.sandisk.com/product-portfolio/memory-cards](https://www.sandisk.com/product-portfolio/memory-cards) - [www.sandisk.com/solutions/gaming/nintendo-switch-memory-cards](https://www.sandisk.com/solutions/gaming/nintendo-switch-memory-cards) - [www.sandisk.com/solutions/memory-cards/specialty](https://www.sandisk.com/solutions/memory-cards/specialty) - [www.sandisk.com/solutions/works-with-chromebook](https://www.sandisk.com/solutions/works-with-chromebook) - [www.sandisk.com/solutions/memory-cards/card-readers](https://www.sandisk.com/solutions/memory-cards/card-readers) - [www.sandisk.com/support/category-selection?cat=memory-cards](https://www.sandisk.com/support/category-selection?cat=memory-cards) - [www.sandisk.com/solutions/memory-cards](https://www.sandisk.com/solutions/memory-cards) Every test · all 67 tests, in order 67 of 67 showing Show AIR-1.1 Can AI crawlers reach your site? PASS 5 pt Why we test this All 10 AI agents may fetch content paths. Your robots.txt file tells crawlers what they may read. A line left behind by a previous site or a copied template can quietly shut out the assistants people now use to find you. AIR-1.2 Does your CDN let AI crawlers through? PASS 5 pt Why we test this All 8 AI user-agents receive full content. Even when robots.txt says yes, a firewall or bot-protection rule can turn assistants away before they reach your pages. We sent a request as each one and recorded what came back. AIR-1.3 Is your page readable without a security challenge? PASS 1 pt Why we test this No interactive challenges on 32 sampled read-only pages. A CAPTCHA or bot check on an ordinary page stops an assistant at the door. These belong on forms and logins, not on pages anyone can read. AIR-1.4 Have you stated what AI may do with your content? No Content-Signal line in robots.txt. Missing: search, ai-input, ai-train. PROBLEM +3 What's wrong No Content-Signal line in robots.txt. Missing: search, ai-input, ai-train. There is now a machine-readable way to say whether AI may search, quote or train on your material. Having a position — any position — is the point. [See AIR-1.4 in the full index →](https://readinessindex.io/tests#c-AIR-1.4) AIR-1.5 Can a person read your AI policy? robots.txt carries no human-readable policy statement. PROBLEM +1 What's wrong robots.txt carries no human-readable policy statement. A few plain sentences in robots.txt saying what you permit. Journalists and lawyers read this file, and right now most sites say nothing. [See AIR-1.5 in the full index →](https://readinessindex.io/tests#c-AIR-1.5) AIR-1.6 Are you allowing assistants to quote you? PASS 1 pt Why we test this No noarchive, nosnippet or max-snippet:0 directives found. Some sites carry old settings that tell search engines not to show excerpts. Those same settings stop an assistant quoting your page in an answer. AIR-1.7 Does this page declare its real address? PASS 2 pt Why we test this 91% of sampled pages emit a valid, self-consistent canonical. 3 have problems. A canonical link tells a machine which URL is the true one. Without it the same content can be treated as several competing pages. AIR-1.8 Is your page structured so a machine can follow it? 0% of sampled pages carry one main element, a wrapping article or section, and a nav. 29 exceed 12 divs per semantic element. PROBLEM +2 What's wrong 0% of sampled pages carry one main element, a wrapping article or section, and a nav. 29 exceed 12 divs per semantic element. Meaningful sections rather than an undifferentiated wall of containers. It is the difference between a document and a soup of boxes. [See AIR-1.8 in the full index →](https://readinessindex.io/tests#c-AIR-1.8) AIR-1.9 Do your headings tell a clear story? 55% of sampled pages have exactly one non-empty h1 and no skipped heading levels. 4 have no h1; 10 have several NEEDS WORK +1 What's half-done 55% of sampled pages have exactly one non-empty h1 and no skipped heading levels. 4 have no h1; 10 have several One main heading, then sub-headings in order. Assistants use headings to work out what a page is about and which part answers a question. [See AIR-1.9 in the full index →](https://readinessindex.io/tests#c-AIR-1.9) AIR-1.10 Do you publish a guide for AI assistants? /llms.txt lists 290 links across 10 sections, covering 0% of the sitemap. NEEDS WORK +1 What's half-done /llms.txt lists 290 links across 10 sections, covering 0% of the sitemap. A file at /llms.txt listing your most important pages. It is early and cheap, and it forces a useful conversation about what actually matters on your site. [See AIR-1.10 in the full index →](https://readinessindex.io/tests#c-AIR-1.10) AIR-1.11 Can a machine tell what your organization is? 1 of 1 entity nodes carry an @id (100%). The WebPage to WebSite to Organization chain is broken at WebPage->WebSite, WebSite->Organization. NEEDS WORK +1 What's half-done 1 of 1 entity nodes carry an @id (100%). The WebPage to WebSite to Organization chain is broken at WebPage->WebSite, WebSite->Organization. Structured data that links together — your organization, your site, this page — rather than a scattering of disconnected labels. [See AIR-1.11 in the full index →](https://readinessindex.io/tests#c-AIR-1.11) AIR-1.12 Can a machine be certain it is you? No sameAs links were found on Organization or Person nodes. PROBLEM +2 What's wrong No sameAs links were found on Organization or Person nodes. Links from your markup to authoritative records like Wikidata or ROR. Without one, an assistant is guessing which organization of your name it has found. [See AIR-1.12 in the full index →](https://readinessindex.io/tests#c-AIR-1.12) AIR-1.13 Can a machine find out who you are? 1 of 7 organizational facts are present in the Organization markup: description. PROBLEM +1 What's wrong 1 of 7 organizational facts are present in the Organization markup: description. Founding date, leadership, address, contact details, legal identifiers. Thin About pages are the most common weakness we see. [See AIR-1.13 in the full index →](https://readinessindex.io/tests#c-AIR-1.13) AIR-2.1 Primary content is present without JavaScript PASS 5 pt Why we test this Raw HTML contains 88% of rendered text on average across 32 URLs. The worst template is /tools/*: 8% across 3 pages. AIR-2.2 Progressive disclosure content ships in the initial HTML 0 of 29 pages ship every disclosure panel populated in the raw HTML. PROBLEM +2 What's wrong 0 of 29 pages ship every disclosure panel populated in the raw HTML. [See AIR-2.2 in the full index →](https://readinessindex.io/tests#c-AIR-2.2) AIR-2.3 Real data tables with header cells 24 tables: 0 complete, 2 without scope on header cells, 0 with no header cells, 20 used for layout. PROBLEM +2 What's wrong 24 tables: 0 complete, 2 without scope on header cells, 0 with no header cells, 20 used for layout. [See AIR-2.3 in the full index →](https://readinessindex.io/tests#c-AIR-2.3) AIR-2.4 Stable, human-readable anchor IDs on section headings 0 of 864 subheadings carry a slug-like id (0%); 0 have generated or unstable ids. PROBLEM +2 What's wrong 0 of 864 subheadings carry a slug-like id (0%); 0 have generated or unstable ids. [See AIR-2.4 in the full index →](https://readinessindex.io/tests#c-AIR-2.4) AIR-2.5 Alt text on content images, empty alt on decorative 98 of 1017 images carry appropriate alt text: 757 have no alt attribute, 5 use the filename. PROBLEM +1 What's wrong 98 of 1017 images carry appropriate alt text: 757 have no alt attribute, 5 use the filename. [See AIR-2.5 in the full index →](https://readinessindex.io/tests#c-AIR-2.5) AIR-2.6 Key facts exist as HTML text, not only in images or PDFs 23 of 32 sampled pages are thin relative to their images or lead with a document download. PROBLEM +1 What's wrong 23 of 32 sampled pages are thin relative to their images or lead with a document download. [See AIR-2.6 in the full index →](https://readinessindex.io/tests#c-AIR-2.6) AIR-3.1 JSON-LD is generated from mapped fields, not hardcoded 3 of 3 templates repeat identical schema literals across pages whose visible content differs. PROBLEM +2 What's wrong 3 of 3 templates repeat identical schema literals across pages whose visible content differs. [See AIR-3.1 in the full index →](https://readinessindex.io/tests#c-AIR-3.1) AIR-3.2 BreadcrumbList on every page below the homepage 0% of pages below the homepage carry a BreadcrumbList with at least two steps. PROBLEM +2 What's wrong 0% of pages below the homepage carry a BreadcrumbList with at least two steps. [See AIR-3.2 in the full index →](https://readinessindex.io/tests#c-AIR-3.2) AIR-3.3 Vertical-specific schema types NOT SCORED — AIR-3.4 FAQPage and QAPage on genuine question-and-answer content 0 pages carry FAQ or QA markup; 5 pages show visible question-and-answer content. PROBLEM +2 What's wrong 0 pages carry FAQ or QA markup; 5 pages show visible question-and-answer content. [See AIR-3.4 in the full index →](https://readinessindex.io/tests#c-AIR-3.4) AIR-3.5 isAccessibleForFree, about, and mentions with entity references 0 of 29 substantive pages declare isAccessibleForFree; 0 reference subject entities by identifier. PROBLEM +1 What's wrong 0 of 29 substantive pages declare isAccessibleForFree; 0 reference subject entities by identifier. [See AIR-3.5 in the full index →](https://readinessindex.io/tests#c-AIR-3.5) AIR-3.6 Product, Offer, and Service with real prices NOT SCORED — AIR-3.7 SearchAction on the WebSite node NOT SCORED — AIR-3.8 Schema validation of the structured data on the page PASS 2 pt Why we test this 29 nodes across 29 pages parse, carry what their types require, and hold well-formed values. AIR-4.1 RSL licensing document published and referenced NOT SCORED — AIR-4.2 RSL terms propagated to feeds and schema NOT SCORED — AIR-4.3 Web Bot Auth verification configured NOT SCORED — AIR-4.4 Correct X-Robots-Tag on non-HTML resources 0 of 25 non-HTML resources carry an X-Robots-Tag. PROBLEM +1 What's wrong 0 of 25 non-HTML resources carry an X-Robots-Tag. [See AIR-4.4 in the full index →](https://readinessindex.io/tests#c-AIR-4.4) AIR-4.5 Missing pages return 404 or 410 PASS 1 pt Why we test this 0 of 6 deliberately invalid URLs returned HTTP 200. AIR-4.6 Redirects resolve in a single hop PASS 1 pt Why we test this 1 of 32 sampled URLs redirect. AIR-4.7 Faceted, calendar, and parameterized URLs are controlled PASS 2 pt Why we test this 3 of 4 parameterized URLs are held in check by noindex or a canonical back to the unfiltered listing. AIR-4.8 Sitemap lastmod reflects real content changes PASS 2 pt Why we test this 22933 of 22933 sitemap URLs carry a lastmod across 322 distinct dates; 15% share 2026-09-19. AIR-4.9 Sitemap index split by type, with media sitemaps An index with 185 child sitemaps covering 22933 URLs, with no image or video sitemap. PROBLEM +1 What's wrong An index with 185 child sitemaps covering 22933 URLs, with no image or video sitemap. [See AIR-4.9 in the full index →](https://readinessindex.io/tests#c-AIR-4.9) AIR-4.10 Paginated series are coherently signaled NOT SCORED — AIR-5.1 Author entity pages with credentials No Person entities appear anywhere in the sample. PROBLEM +2 What's wrong No Person entities appear anywhere in the sample. [See AIR-5.1 in the full index →](https://readinessindex.io/tests#c-AIR-5.1) AIR-5.2 Bylines linked to author entities 0 of 22 substantive pages reference an author by @id; 0 carry a bare string; 22 are unsigned. PROBLEM +2 What's wrong 0 of 22 substantive pages reference an author by @id; 0 carry a bare string; 22 are unsigned. [See AIR-5.2 in the full index →](https://readinessindex.io/tests#c-AIR-5.2) AIR-5.3 reviewedBy on YMYL content NOT SCORED — AIR-5.4 datePublished and dateModified are accurate 0 of 32 pages carry a publication or modification date across 0 distinct dateModified values. PROBLEM +2 What's wrong 0 of 32 pages carry a publication or modification date across 0 distinct dateModified values. [See AIR-5.4 in the full index →](https://readinessindex.io/tests#c-AIR-5.4) AIR-5.5 citation markup on primary-source references NOT SCORED — AIR-5.6 C2PA Content Credentials on original assets NOT SCORED — AIR-6.1 OpenAPI specification for public APIs NOT SCORED — AIR-6.2 /.well-known/ discovery entries for agent capabilities NOT SCORED — AIR-6.3 Form fields carry label, name, and autocomplete 67 of 162 form fields carry an accessible name, a meaningful name attribute and a valid autocomplete token where one applies. NEEDS WORK +1 What's half-done 67 of 162 form fields carry an accessible name, a meaningful name attribute and a valid autocomplete token where one applies. [See AIR-6.3 in the full index →](https://readinessindex.io/tests#c-AIR-6.3) AIR-6.4 No captchas on browse, search, or filter interactions PASS 2 pt Why we test this No search or filter surface in the sample returned a challenge. AIR-7.1 Markdown companion for every canonical page 0 of 23 sampled pages have a Markdown companion at {path}.md returning a Markdown content type. PROBLEM +2 What's wrong 0 of 23 sampled pages have a Markdown companion at {path}.md returning a Markdown content type. [See AIR-7.1 in the full index →](https://readinessindex.io/tests#c-AIR-7.1) AIR-7.2 link rel=alternate advertises the Markdown version NOT SCORED — AIR-7.3 Accept: text/markdown content negotiation 0 of 25 URLs serve Markdown for Accept: text/markdown. PROBLEM +2 What's wrong 0 of 25 URLs serve Markdown for Accept: text/markdown. [See AIR-7.3 in the full index →](https://readinessindex.io/tests#c-AIR-7.3) AIR-7.4 Alternate representations are edge-cached 2 of 4 generated representations show evidence of an edge cache hit on a repeat request. NEEDS WORK +1 What's half-done 2 of 4 generated representations show evidence of an edge cache hit on a repeat request. [See AIR-7.4 in the full index →](https://readinessindex.io/tests#c-AIR-7.4) LI-1 HowTo on procedural content 0 of 3 procedural pages carry HowTo with ordered HowToStep. NOT SCORED — What's wrong 0 of 3 procedural pages carry HowTo with ordered HowToStep. [See LI-1 in the full index →](https://readinessindex.io/tests#c-LI-1) LI-2 speakable on summaries and ledes No speakable specification found on any sampled page. NOT SCORED — What's wrong No speakable specification found on any sampled page. [See LI-2 in the full index →](https://readinessindex.io/tests#c-LI-2) LI-3 IndexNow fires on publish and update No IndexNow key file was discoverable. The file is named after the key, which is not published, so this is 'not discoverable' rather than proof of absence. NOT SCORED — What's wrong No IndexNow key file was discoverable. The file is named after the key, which is not published, so this is 'not discoverable' rather than proof of absence. [See LI-3 in the full index →](https://readinessindex.io/tests#c-LI-3) LI-4 Editorial policy page referenced via publishingPrinciples 0 of 29 Organization nodes reference publishingPrinciples. NOT SCORED — What's wrong 0 of 29 Organization nodes reference publishingPrinciples. [See LI-4 in the full index →](https://readinessindex.io/tests#c-LI-4) LI-5 NLWeb endpoint exposed as an MCP server with an ask method No NLWeb endpoint was discoverable. NOT SCORED — What's wrong No NLWeb endpoint was discoverable. [See LI-5 in the full index →](https://readinessindex.io/tests#c-LI-5) LI-6 Domain MCP server over real content APIs No domain MCP server or tool descriptor was discoverable. NOT SCORED — What's wrong No domain MCP server or tool descriptor was discoverable. [See LI-6 in the full index →](https://readinessindex.io/tests#c-LI-6) LI-7 /llms-full.txt where full-text inclusion is appropriate NOT SCORED — BP-1 Critical flows complete without JS-only interactions NOT SCORED — BP-2 Stable selectors on critical-flow elements NOT SCORED — BP-3 GA4 channel group for AI assistant referrers Whether a channel group exists for AI assistant referrers is not visible from outside. Analytics presence is; the grouping is not. NOT SCORED — What we're measuring Whether a channel group exists for AI assistant referrers is not visible from outside. Analytics presence is; the grouping is not. [See BP-3 in the full index →](https://readinessindex.io/tests#c-BP-3) BP-4 Server-side tagging captures stripped referrers Reconciliation between server-side and client-side numbers has to be attested. NOT SCORED — What we're measuring Reconciliation between server-side and client-side numbers has to be attested. [See BP-4 in the full index →](https://readinessindex.io/tests#c-BP-4) BP-5 Access log retention with a queryable store Log retention and queryability are not observable from outside the site. NOT SCORED — What we're measuring Log retention and queryability are not observable from outside the site. [See BP-5 in the full index →](https://readinessindex.io/tests#c-BP-5) BP-6 Scheduled AI crawler activity report NOT SCORED — BP-7 Fixed prompt panel run monthly across models Answer-share tracking happens outside the site and must be attested. NOT SCORED — What we're measuring Answer-share tracking happens outside the site and must be attested. [See BP-7 in the full index →](https://readinessindex.io/tests#c-BP-7) BP-8 Extraction-fidelity baseline captured No extraction-fidelity baseline is captured by this version of the scanner, which makes no live model calls. NOT SCORED — What we're measuring No extraction-fidelity baseline is captured by this version of the scanner, which makes no live model calls. [See BP-8 in the full index →](https://readinessindex.io/tests#c-BP-8) BP-9 Search Console and Bing Webmaster Tools verified Neither Search Console nor Bing Webmaster Tools verification was found. NOT SCORED — What's wrong Neither Search Console nor Bing Webmaster Tools verification was found. [See BP-9 in the full index →](https://readinessindex.io/tests#c-BP-9) Not applicable — 22 tests answered with a dash, excluded from the score: AIR-3.3, AIR-3.6, AIR-3.7, AIR-4.1, AIR-4.2, AIR-4.3, AIR-4.10, AIR-5.3, AIR-5.5, AIR-5.6, AIR-6.1, AIR-6.2, AIR-7.2, LI-7, BP-1, BP-2, BP-3, BP-4, BP-5, BP-6, BP-7, BP-8. By dimension Where Sandisk's 43 came from. Open a line to see its tests, worst first. Dimension Share earned Earned Score 1 · Primary Indicators 17 57 Scored zero — 5 problems AIR-1.4 Have you stated what AI may do with your content? No Content-Signal line in robots.txt. Missing: search, ai-input, ai-train. PROBLEM What's wrong No Content-Signal line in robots.txt. Missing: search, ai-input, ai-train. There is now a machine-readable way to say whether AI may search, quote or train on your material. Having a position — any position — is the point. [See AIR-1.4 in the full index →](https://readinessindex.io/tests#c-AIR-1.4) AIR-1.5 Can a person read your AI policy? robots.txt carries no human-readable policy statement. PROBLEM What's wrong robots.txt carries no human-readable policy statement. A few plain sentences in robots.txt saying what you permit. Journalists and lawyers read this file, and right now most sites say nothing. [See AIR-1.5 in the full index →](https://readinessindex.io/tests#c-AIR-1.5) AIR-1.8 Is your page structured so a machine can follow it? 0% of sampled pages carry one main element, a wrapping article or section, and a nav. 29 exceed 12 divs per semantic element. PROBLEM What's wrong 0% of sampled pages carry one main element, a wrapping article or section, and a nav. 29 exceed 12 divs per semantic element. Meaningful sections rather than an undifferentiated wall of containers. It is the difference between a document and a soup of boxes. [See AIR-1.8 in the full index →](https://readinessindex.io/tests#c-AIR-1.8) AIR-1.12 Can a machine be certain it is you? No sameAs links were found on Organization or Person nodes. PROBLEM What's wrong No sameAs links were found on Organization or Person nodes. Links from your markup to authoritative records like Wikidata or ROR. Without one, an assistant is guessing which organization of your name it has found. [See AIR-1.12 in the full index →](https://readinessindex.io/tests#c-AIR-1.12) AIR-1.13 Can a machine find out who you are? 1 of 7 organizational facts are present in the Organization markup: description. PROBLEM What's wrong 1 of 7 organizational facts are present in the Organization markup: description. Founding date, leadership, address, contact details, legal identifiers. Thin About pages are the most common weakness we see. [See AIR-1.13 in the full index →](https://readinessindex.io/tests#c-AIR-1.13) Partly scored — 3 need work AIR-1.9 Do your headings tell a clear story? 55% of sampled pages have exactly one non-empty h1 and no skipped heading levels. 4 have no h1; 10 have several NEEDS WORK What's half-done 55% of sampled pages have exactly one non-empty h1 and no skipped heading levels. 4 have no h1; 10 have several One main heading, then sub-headings in order. Assistants use headings to work out what a page is about and which part answers a question. [See AIR-1.9 in the full index →](https://readinessindex.io/tests#c-AIR-1.9) AIR-1.10 Do you publish a guide for AI assistants? /llms.txt lists 290 links across 10 sections, covering 0% of the sitemap. NEEDS WORK What's half-done /llms.txt lists 290 links across 10 sections, covering 0% of the sitemap. A file at /llms.txt listing your most important pages. It is early and cheap, and it forces a useful conversation about what actually matters on your site. [See AIR-1.10 in the full index →](https://readinessindex.io/tests#c-AIR-1.10) AIR-1.11 Can a machine tell what your organization is? 1 of 1 entity nodes carry an @id (100%). The WebPage to WebSite to Organization chain is broken at WebPage->WebSite, WebSite->Organization. NEEDS WORK What's half-done 1 of 1 entity nodes carry an @id (100%). The WebPage to WebSite to Organization chain is broken at WebPage->WebSite, WebSite->Organization. Structured data that links together — your organization, your site, this page — rather than a scattering of disconnected labels. [See AIR-1.11 in the full index →](https://readinessindex.io/tests#c-AIR-1.11) Full marks — 5 pass AIR-1.1 Can AI crawlers reach your site? PASS Why we test this All 10 AI agents may fetch content paths. Your robots.txt file tells crawlers what they may read. A line left behind by a previous site or a copied template can quietly shut out the assistants people now use to find you. AIR-1.2 Does your CDN let AI crawlers through? PASS Why we test this All 8 AI user-agents receive full content. Even when robots.txt says yes, a firewall or bot-protection rule can turn assistants away before they reach your pages. We sent a request as each one and recorded what came back. AIR-1.3 Is your page readable without a security challenge? PASS Why we test this No interactive challenges on 32 sampled read-only pages. A CAPTCHA or bot check on an ordinary page stops an assistant at the door. These belong on forms and logins, not on pages anyone can read. AIR-1.6 Are you allowing assistants to quote you? PASS Why we test this No noarchive, nosnippet or max-snippet:0 directives found. Some sites carry old settings that tell search engines not to show excerpts. Those same settings stop an assistant quoting your page in an answer. AIR-1.7 Does this page declare its real address? PASS Why we test this 91% of sampled pages emit a valid, self-consistent canonical. 3 have problems. A canonical link tells a machine which URL is the true one. Without it the same content can be treated as several competing pages. 2 · Rendering and Extraction 6 40 Scored zero — 5 problems AIR-2.2 Progressive disclosure content ships in the initial HTML 0 of 29 pages ship every disclosure panel populated in the raw HTML. PROBLEM What's wrong 0 of 29 pages ship every disclosure panel populated in the raw HTML. [See AIR-2.2 in the full index →](https://readinessindex.io/tests#c-AIR-2.2) AIR-2.3 Real data tables with header cells 24 tables: 0 complete, 2 without scope on header cells, 0 with no header cells, 20 used for layout. PROBLEM What's wrong 24 tables: 0 complete, 2 without scope on header cells, 0 with no header cells, 20 used for layout. [See AIR-2.3 in the full index →](https://readinessindex.io/tests#c-AIR-2.3) AIR-2.4 Stable, human-readable anchor IDs on section headings 0 of 864 subheadings carry a slug-like id (0%); 0 have generated or unstable ids. PROBLEM What's wrong 0 of 864 subheadings carry a slug-like id (0%); 0 have generated or unstable ids. [See AIR-2.4 in the full index →](https://readinessindex.io/tests#c-AIR-2.4) AIR-2.5 Alt text on content images, empty alt on decorative 98 of 1017 images carry appropriate alt text: 757 have no alt attribute, 5 use the filename. PROBLEM What's wrong 98 of 1017 images carry appropriate alt text: 757 have no alt attribute, 5 use the filename. [See AIR-2.5 in the full index →](https://readinessindex.io/tests#c-AIR-2.5) AIR-2.6 Key facts exist as HTML text, not only in images or PDFs 23 of 32 sampled pages are thin relative to their images or lead with a document download. PROBLEM What's wrong 23 of 32 sampled pages are thin relative to their images or lead with a document download. [See AIR-2.6 in the full index →](https://readinessindex.io/tests#c-AIR-2.6) Full marks — 1 pass AIR-2.1 Primary content is present without JavaScript PASS Why we test this Raw HTML contains 88% of rendered text on average across 32 URLs. The worst template is /tools/*: 8% across 3 pages. 3 · Structured Data and the Entity Graph 2 13 Scored zero — 4 problems AIR-3.1 JSON-LD is generated from mapped fields, not hardcoded 3 of 3 templates repeat identical schema literals across pages whose visible content differs. PROBLEM What's wrong 3 of 3 templates repeat identical schema literals across pages whose visible content differs. [See AIR-3.1 in the full index →](https://readinessindex.io/tests#c-AIR-3.1) AIR-3.2 BreadcrumbList on every page below the homepage 0% of pages below the homepage carry a BreadcrumbList with at least two steps. PROBLEM What's wrong 0% of pages below the homepage carry a BreadcrumbList with at least two steps. [See AIR-3.2 in the full index →](https://readinessindex.io/tests#c-AIR-3.2) AIR-3.4 FAQPage and QAPage on genuine question-and-answer content 0 pages carry FAQ or QA markup; 5 pages show visible question-and-answer content. PROBLEM What's wrong 0 pages carry FAQ or QA markup; 5 pages show visible question-and-answer content. [See AIR-3.4 in the full index →](https://readinessindex.io/tests#c-AIR-3.4) AIR-3.5 isAccessibleForFree, about, and mentions with entity references 0 of 29 substantive pages declare isAccessibleForFree; 0 reference subject entities by identifier. PROBLEM What's wrong 0 of 29 substantive pages declare isAccessibleForFree; 0 reference subject entities by identifier. [See AIR-3.5 in the full index →](https://readinessindex.io/tests#c-AIR-3.5) Full marks — 1 pass AIR-3.8 Schema validation of the structured data on the page PASS Why we test this 29 nodes across 29 pages parse, carry what their types require, and hold well-formed values. 4 · Crawl, Index and Licensing Hygiene 5 42 Scored zero — 2 problems AIR-4.4 Correct X-Robots-Tag on non-HTML resources 0 of 25 non-HTML resources carry an X-Robots-Tag. PROBLEM What's wrong 0 of 25 non-HTML resources carry an X-Robots-Tag. [See AIR-4.4 in the full index →](https://readinessindex.io/tests#c-AIR-4.4) AIR-4.9 Sitemap index split by type, with media sitemaps An index with 185 child sitemaps covering 22933 URLs, with no image or video sitemap. PROBLEM What's wrong An index with 185 child sitemaps covering 22933 URLs, with no image or video sitemap. [See AIR-4.9 in the full index →](https://readinessindex.io/tests#c-AIR-4.9) Full marks — 4 pass AIR-4.5 Missing pages return 404 or 410 PASS Why we test this 0 of 6 deliberately invalid URLs returned HTTP 200. AIR-4.6 Redirects resolve in a single hop PASS Why we test this 1 of 32 sampled URLs redirect. AIR-4.7 Faceted, calendar, and parameterized URLs are controlled PASS Why we test this 3 of 4 parameterized URLs are held in check by noindex or a canonical back to the unfiltered listing. AIR-4.8 Sitemap lastmod reflects real content changes PASS Why we test this 22933 of 22933 sitemap URLs carry a lastmod across 322 distinct dates; 15% share 2026-09-19. 5 · Authorship, Provenance, Freshness 0 0 Scored zero — 3 problems AIR-5.1 Author entity pages with credentials No Person entities appear anywhere in the sample. PROBLEM What's wrong No Person entities appear anywhere in the sample. [See AIR-5.1 in the full index →](https://readinessindex.io/tests#c-AIR-5.1) AIR-5.2 Bylines linked to author entities 0 of 22 substantive pages reference an author by @id; 0 carry a bare string; 22 are unsigned. PROBLEM What's wrong 0 of 22 substantive pages reference an author by @id; 0 carry a bare string; 22 are unsigned. [See AIR-5.2 in the full index →](https://readinessindex.io/tests#c-AIR-5.2) AIR-5.4 datePublished and dateModified are accurate 0 of 32 pages carry a publication or modification date across 0 distinct dateModified values. PROBLEM What's wrong 0 of 32 pages carry a publication or modification date across 0 distinct dateModified values. [See AIR-5.4 in the full index →](https://readinessindex.io/tests#c-AIR-5.4) 6 · Agent Interfaces 3 38 Partly scored — 1 needs work AIR-6.3 Form fields carry label, name, and autocomplete 67 of 162 form fields carry an accessible name, a meaningful name attribute and a valid autocomplete token where one applies. NEEDS WORK What's half-done 67 of 162 form fields carry an accessible name, a meaningful name attribute and a valid autocomplete token where one applies. [See AIR-6.3 in the full index →](https://readinessindex.io/tests#c-AIR-6.3) Full marks — 1 pass AIR-6.4 No captchas on browse, search, or filter interactions PASS Why we test this No search or filter surface in the sample returned a challenge. 7 · Alternate Representations 1 12 Scored zero — 2 problems AIR-7.1 Markdown companion for every canonical page 0 of 23 sampled pages have a Markdown companion at {path}.md returning a Markdown content type. PROBLEM What's wrong 0 of 23 sampled pages have a Markdown companion at {path}.md returning a Markdown content type. [See AIR-7.1 in the full index →](https://readinessindex.io/tests#c-AIR-7.1) AIR-7.3 Accept: text/markdown content negotiation 0 of 25 URLs serve Markdown for Accept: text/markdown. PROBLEM What's wrong 0 of 25 URLs serve Markdown for Accept: text/markdown. [See AIR-7.3 in the full index →](https://readinessindex.io/tests#c-AIR-7.3) Partly scored — 1 needs work AIR-7.4 Alternate representations are edge-cached 2 of 4 generated representations show evidence of an edge cache hit on a repeat request. NEEDS WORK What's half-done 2 of 4 generated representations show evidence of an edge cache hit on a repeat request. [See AIR-7.4 in the full index →](https://readinessindex.io/tests#c-AIR-7.4) What was read 32 pages, sampled from this site's own sitemap and internal links. The cap is 32 — a ceiling, not a certainty: a site with fewer reachable pages yields fewer. 503 https://www.sandisk.com/tools/product-compare?ids=SDSP71500GAN-000E0:sandisk-optimus-gx-7100-internal-nvme-ssd,SDSNS2500GAB-000G0:sandisk-nas-600-sata-ssd,SDSP82100TAH-000E0:sandisk-optimus-gx-pro-8100-internal-nvme-ssd,SDSP81100TAH-000E0:sandisk-optimus-gx-pro-850x-internal-nvme-ssd Answered 503. no response https://www.sandisk.com/solutions/what-is-nvme-ssd No response. 503 https://www.sandisk.com/tools/laptop-pc-ssd-finder Answered 503. 29 other pages, all 200, by template 2× / https://sandisk.com/ 3× /product-portfolio/ssd/* https://www.sandisk.com/product-portfolio/ssd/internal-ssd 2× /product-portfolio/* https://www.sandisk.com/product-portfolio/ssd 2× /solutions/gaming/* https://www.sandisk.com/solutions/gaming/desktop-laptop-gaming-storage-drives 10× /solutions/* https://www.sandisk.com/solutions/digital-photography 1× /solutions/backups/* https://www.sandisk.com/solutions/backups/computer-backup-with-ssds 2× /support/* https://www.sandisk.com/support/category-selection?cat=solid-state-drives-ssd 1× /topics/* https://www.sandisk.com/topics/ssd 3× /product-portfolio/memory-cards/* https://www.sandisk.com/product-portfolio/memory-cards/sd-cards 1× /tools/* https://www.sandisk.com/tools/product-compare?ids=SDSQXFN-512G-GN4NN:sandisk-microsd-express-memory-card,SDSQXAV-512G-GN6MA:extreme-uhs-i-microsd,SDSQXCD-512G-GN6MA:extreme-pro-uhs-i-microsd,SDSQUAC-512G-GN6MA:ultra-uhs-i-microsd-150-mbps 2× /solutions/memory-cards/* https://www.sandisk.com/solutions/memory-cards/specialty The receipt **Cohort** sp500 **Source** List of S&P 500 companies (Wikipedia contributors, 2026-09-08) **Index** 11.0, in effect 2026-09-24 **Scanner** 0.1.0 **Scanned** 2026-09-20T04:50:13.645636+00:00 **Result hash** b9a51df883eb92dd5b7bc87599e6bedd3d8f20a7cf2b07d9f3d297f8906be659 **Basis** public-interest census: a declared bot with a published policy at https://readinessindex.io/bot, honoring robots.txt addressed to AIRBot, reading public pages only. No per-site permission was sought or given. The hash is the SHA-256 of the full `result.json`, recorded when the scan finished rather than computed now. The raw evidence behind every line above — every response, cached — is retained and is a median 1.5 MB per site, so it is not served from here. [Ask us for it](mailto:hello@readinessindex.io) if you want to check a number against the bytes it came from. Think this is wrong? It might be. Tell us at [hello@readinessindex.io](mailto:hello@readinessindex.io) and we will look, correct it if it is, and say so publicly either way. **About these numbers.** Points are whole numbers everywhere on this page. The arithmetic behind them is not — a test scores its weight times its band divided by four, so a row can earn 1.5 points and print as 2. Scores are computed from the exact figures and rounded once, at the end, never from the rounded rows. That means adding the points column up will not give you the score exactly. The rule is published in [the standard](https://readinessindex.io/tests#rounding).