Invisible. Agents can't meaningfully engage with this storefront.

Walmart.com scored 25 out of 97 and sits squarely in the Invisible band, which is a striking result for the largest retailer in the country. The store publishes a permissive robots.txt and 34 sitemaps, then slams the door shut with PerimeterX at the edge, blocking 59% of fetches and returning a CAPTCHA on the homepage, cart, checkout, returns, and every sampled product page. An agent that follows the welcome mat straight into a verification wall cannot read prices, parse specs, or complete a transaction.

Where the points went

The evidence

• PerimeterX blocks 59% of fetches (0/6): Challenge pages logged at walmart.com/, /cart, /checkout, /returns, /sitemap.xml, /llms.txt, and all 9 sampled product URLs, all from provider perimeterx. Check 4.3 recorded a 90.5% block rate and could not even evaluate rate limiting.
• Zero structured product data across the sample (0/6): All 9 sampled URLs returned hasProduct: false, hasOffer: false, dialects: ["none"]. The sitemap at walmart.com/sitemap.xml reports total_locs: 0 and has_product_urls: false.
• Price is invisible in HTML (0/8): raw_hits: 0, rendered_hits: 0 across all 9 products. Rendered fetches returned status 0, meaning the headless browser was blocked before paint.
• Content signals collapse behind the wall (0/11 across 6.1 to 6.4): Classifier notes read "Page content not accessible, robot/human verification barrier prevents data extraction" and "only legal footer text visible." Nothing to summarize.
• Fake urgency flagged (1/2): The phrase "Get as soon as 13 mins" was detected as fake_urgency, with no legitimate counterpart.

What already works

• Crawler posture is fully permissive: ChatGPT-User, OAI-SearchBot, Claude-User, PerplexityBot, and Amazonbot are all allowed in robots.txt.
• llms.txt is published at walmart.com/llms.txt (though it too returns a PerimeterX challenge).
• PayPal is exposed as a machine-native wallet on cart and homepage.

Fix first

1. Allowlist verified agent user-agents at the PerimeterX layer for read paths (product, cart, returns, sitemap): recovers ~10 points and unlocks every content check.
2. Emit Product plus Offer JSON-LD with price, availability, and shippingDetails on PDPs: recovers ~14 points across 1.2, 2.1, 2.2, 2.3.
3. Publish a machine-readable returns policy and delivery ETA copy on PDPs: recovers ~5 points.

The single biggest lever is the edge: every other fix is invisible until agents can actually reach the page.