Can agents find your site and its capabilities?
The page registers no tools via the WebMCP browser API (navigator.modelContext).
Fix: Expose your actions to AI agents with the WebMCP browser API: register tools via navigator.modelContext.registerTool. Optionally also publish a /.well-known/webmcp.json tool catalog as a discovery signpost.
Crawled 12 of 12 discovered pages beyond the homepage.
Could not identify a known website platform (custom stack or unrecognised).
Can agents understand your content?
Only 0 of 1 images have alt attributes (0%).
Fix: Add alt text to every <img>. Screen readers and AI vision models both rely on it to caption images.
No links found on the homepage.
Fix: Add navigation links so AI crawlers can find the rest of your content. A bare landing page is invisible to anything that doesn't already know where to look.
No semantic landmark elements (main, header, footer, nav) detected on the homepage.
Fix: Wrap your page structure in semantic landmarks. AI structural extractors rely on them to separate navigation from content from boilerplate.
No <h1> tag found on the homepage.
Fix: Add exactly one <h1> that names the page. AI summarisers use it as the document title.
Homepage ignored Accept: text/markdown and returned HTML.
Fix: Serve a markdown version of high-value pages when the client asks for text/markdown. AI summarisers, chatbots and IDE agents prefer markdown — fewer tokens, no DOM noise.
Homepage server response contains only 32 words of visible text. AI agents that don't execute JavaScript may see an empty page.
Fix: Consider pre-rendering or server-rendering the homepage so AI crawlers (which typically don't run JS) can see the content. Frameworks: Next.js (Server Components), Nuxt SSR, Astro, or Vite SSG.
Only 0/1 images have width+height — large CLS risk.
Fix: Set width and height on every <img> so the browser reserves space before the image loads. A layout that shifts while loading makes an AI agent mis-click the element it targeted.
12 of 12 pages are missing <title> and/or <h1>: /, /en/us/account/preferences, /en/us/account, /en/us/baggage-calculator/any-flights, /en/us/baggage-tracing, /en/us/book-flight/united-award-travel, /en/us/book-flight/united-multicity, /en/us/book-flight/united-reservations, /en/us/checkin, /en/us/customercare, /en/us/destination-map, /en/us/flightstatus.
Fix: Make sure every page sets a unique <title> and exactly one <h1>. The title is how an AI agent confirms it landed on the right page after navigating.
12 of 12 pages return <80 words of visible text — agents without JavaScript see an empty page: / (32w), /en/us/account/preferences (32w), /en/us/account (32w), /en/us/baggage-calculator/any-flights (32w), /en/us/baggage-tracing (32w), /en/us/book-flight/united-award-travel (32w), /en/us/book-flight/united-multicity (32w), /en/us/book-flight/united-reservations (32w), /en/us/checkin (32w), /en/us/customercare (32w), /en/us/destination-map (32w), /en/us/flightstatus (32w).
Fix: Pre-render or server-render these pages so AI crawlers (which usually don't execute JS) can read them. Frameworks: Next.js Server Components, Nuxt SSR, Astro, or build-time prerendering.
Homepage contains ~49 elements.
Language declared as "en".
Can agents actually operate the page?
Lighthouse flagged this audit — agents may be unable to perceive or operate the affected elements.
Fix: Fix invalid values on aria-* attributes.
0.420 (field data from CrUX) — poor.
Fix: A layout that shifts while loading makes an AI agent mis-click the element it targeted. Eliminate CLS by setting explicit width/height on images and embeds, avoiding inserted content above existing content, and reserving space for ad slots.
The page registers no tools via the navigator.modelContext browser API, so an AI agent has no structured way to operate it.
Fix: Expose your site’s actions to AI agents with the WebMCP browser API: call navigator.modelContext.registerTool({ name, description, inputSchema, execute }) from your page so an agent can invoke them. Implement it directly, or with a library like the @mcp-b polyfill (https://mcp-b.ai). Spec: https://github.com/webmachinelearning/webmcp.
1 of 15 agent-critical accessibility audits failed (`[aria-*]` attributes do not have valid values) — an agent may be unable to identify or operate the affected elements.
Fix: Fix the failing agent-accessibility audits listed below (accessible names on controls, valid ARIA roles/relationships, nothing interactive hidden from the tree).
`[aria-*]` attributes match their roles passed.
Uses ARIA roles only on compatible elements passed.
`button`, `link`, and `menuitem` elements have accessible names passed.
`[aria-hidden="true"]` is not present on the document `<body>` passed.
`[aria-hidden="true"]` elements do not contain focusable descendents passed.
`[role]`s have all required `[aria-*]` attributes passed.
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children. passed.
`[role]`s are contained by their required parent element passed.
`[role]` values are valid passed.
`[aria-*]` attributes are valid and not misspelled passed.
Buttons have an accessible name passed.
Document has a `<title>` element passed.
Input buttons have discernible text. passed.
Links have a discernible name passed.
Lighthouse accessibility score: 96/100. Agents read the page through its accessibility tree, so this is a proxy for how navigable your site is to an AI agent.
652ms (field data from CrUX) — good.
No tool catalog was found at /.well-known/webmcp.json (or /.well-known/webmcp). The catalog is a community convention, not part of the WebMCP standard, so this does not affect WebMCP presence.
Fix: Consider also publishing a tool catalog at /.well-known/webmcp.json: a JSON document with a "spec" of "webmcp/0.1" and a "tools" array, where each tool declares a name and a clear description. It is a community convention (optional, not part of the WebMCP standard) that lets crawlers and agents discover your tools without executing JavaScript.
Can agents safely transact?
/.well-known/oauth-authorization-server returned 404.
Fix: Publish /.well-known/oauth-authorization-server so AI agents discovering your OAuth setup can negotiate flows automatically. Required if your site offers an authenticated API.
/.well-known/oauth-protected-resource returned 404.
Fix: Publish /.well-known/oauth-protected-resource so AI agents discovering your OAuth setup can negotiate flows automatically. Required if your site offers an authenticated API.
No Web Bot Auth signature headers — sites can't verify agent identity.
Fix: Web Bot Auth (IETF HTTP Message Signatures over Signature / Signature-Input) lets you cryptographically verify which agent is hitting you. Several CDNs offer turn-key support; otherwise skip until vendor support matures.
No Content-Security-Policy header on the homepage.
Fix: Add a Content-Security-Policy. Even a strict default-src directive cuts XSS blast radius dramatically. Start in report-only mode to find violations.
No Referrer-Policy header on the homepage.
Fix: Add `Referrer-Policy: strict-origin-when-cross-origin` so outbound links don't leak full URLs (including query strings) to third parties.
No `X-Content-Type-Options: nosniff` header.
Fix: Add `X-Content-Type-Options: nosniff` to prevent browsers (and some agents) from re-interpreting your responses as a different content type.
x-akamai-transformed: 9l 72915 0 pmb=mRUM,3 (Akamai); Server: AkamaiNetStorage
max-age=15768000, includeSubDomains=true, preload=true.
Homepage scheme is https:.
http://united.com → https://www.united.com/ (2 hops).
No stack-trace markers in the first 5KB.
Homepage HTML references no http:// resources.
Valid for 140 more days (Dec 8 23:59:59 2026 GMT, issuer: GeoTrust TLS RSA CA G1).
Server / X-Powered-By headers don't leak product version.
X-Frame-Options: SAMEORIGIN.