Reference

What we check, and what each one means

19 signals across three groups. Each one has a page explaining what it is, why an agent cares, and exactly how to fix it.

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Readable

Can an agent get your content and understand it.

Content in the HTML
Whether your words survive a request that never runs JavaScript.
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AI crawler access
Which assistants your robots.txt lets in — and the difference between two very different blocks.
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Structured data
JSON-LD is how you state facts about yourself instead of hoping they're inferred.
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Basic metadata
The title, description and canonical tag: the few lines that describe a page before anyone reads it.
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llms.txt
A one-file map that tells an agent which of your pages are worth reading.
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Sitemap
Discovery for the pages nothing links to.
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Semantic structure
Landmarks are how an extractor tells your content from your chrome.
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Key facts
Name, description, pricing, contact — the four things an agent needs to represent you.
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Actionable

Can an agent do something on your site without a human.

Bot access
Whether a non-browser client gets your page or a challenge screen.
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Contact reachability
An address an agent can act on, not a widget it can only look at.
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Form submittability
Whether your enquiry form works without a browser running it.
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Booking path
The conversion moment, and whether software can reach it.
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API surface
The difference between an agent describing you and an agent using you.
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MCP endpoint
How an agent operates your product instead of reading about it.
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Agent manifest
Where you tell an agent what it may do, before it guesses.
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Trusted

Is the response clean enough to rely on.

HTTPS
The floor. Everything else assumes it.
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Verifiable identity
Whether a model can corroborate that you are who you say you are.
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Response hygiene
Headers that stop a parser from guessing.
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Page weight
Agents read on a budget, and the bottom of the page is what gets cut.
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See where your own site stands

All 19 checks against your URL, in about twenty seconds.