Can crawlers and agents actually use your site?

Same twelve checks we ship in open source — free, no sign-in to start. One scan per domain. Enter a full URL starting with https:// and run the scan to see your score out of twelve.

The scan measures discoverability (robots.txt, sitemap.xml, llms.txt), machine-readable signals (FAQ at /faq, blueprint.txt, MCP, CLI), and PWA basics (manifest, iOS meta, service worker, viewport). Each check maps to code in our public GitHub repo.

What the twelve checks cover

Discoverability: site reachable, robots.txt, sitemap.xml, llms.txt. Machine signals: FAQ page, Blueprint Protocol, MCP, CLI install patterns. PWA / mobile: Android manifest, iOS web-app meta, service worker, viewport meta.

Sign in free to see exactly which checks fail and how to fix them. Cleared the crawl baseline? List on The Stackhouse for free for human review and public proof when live-approved.

Learn the checks

Read our scanner-accurate guides: guides index, llms.txt, /faq, and CLI & Silver tier. For operational details, see llms.txt and blueprint.txt.