Mixed signal. Discovery holds up, but content falls short.

Casper is a well-instrumented Shopify storefront that agents can read but cannot fully transact against. The discoverability and machine-readability fundamentals are solid (open crawler policy, JSON-LD offers on 8 of 9 products, prices in raw HTML), but transactability collapses at the cart with CAPTCHA gates, invisible shipping and tax, and a checkout that 403s on inspection. Score of 58 is a fair reflection: readable catalog, hostile checkout.

Where the points went

The evidence

• CAPTCHA on transactional surfaces (0/4). Both reCAPTCHA and hCaptcha detected on /cart and homepage, with transaction_blocking: true. This is the single biggest agent blocker on the site.
• Price transparency fails (0/4). Classifier on the cart page: "no shipping cost information, shipping calculator, or tax information visible on the cart page before checkout." Agents cannot compute a landed price.
• Checkout unreachable (2/6 on flow, 2/6 on guest). https://casper.com/checkout returned 403 during the scan, and the cart requires initialization to render steps. Guest availability could not be confirmed; account nav is prominent instead.
• Sitemap is a stub (2/4). sitemap.xml returned only 5 locs with has_product_urls: false and no lastmod. Agents crawling for the catalog get nothing useful from it.
• One product page is a black hole. flannel-duvet-cover has no Product schema, no offer, no attributes, no price, no description signal. It drags every sampled dimension down.
• No stated agent policy (0/2). Terms and privacy are silent on automated access. Ambiguity defaults to caution for well-behaved agents.

What already works

• Crawler posture is fully open: all 8 tracked agents (ChatGPT-User, Claude-User, PerplexityBot, etc.) allowed in robots.txt, plus a live llms.txt.
• Payment rails and cart API are agent-grade: Shop Pay detected alongside Apple Pay and PayPal, with Shopify's /cart endpoint accessible.
• Returns policy is machine-readable end to end: window, conditions, and process all extractable from /returns, including the 100-night mattress trial.

Fix first

1. Remove or scope CAPTCHA off /cart and homepage; gate only on suspicious signals. (+4)
2. Surface shipping and tax estimates on the cart before auth, even as a ZIP-based estimator. (+4)
3. Publish a stated agent policy in terms and add product URLs with lastmod to the sitemap. (+4)

The biggest unlock is the cart: an agent that can read every Casper price but cannot get past a CAPTCHA to quote a total is an agent that recommends a competitor.