SecondDoor

Human door and agent door, scored separately

Your website has two front doors. You have only ever tested one.

We walk your site twice. Once as a person, once as a machine buying on someone's behalf. Both are scored out of 100. The difference between them is your Door Gap, and it is usually the number nobody in the building has seen.

Sign up and scan your domain

One free scan a month. No card, no trial clock.

Takes about thirty seconds once you are in./Already have an account?

llms.txtSteps to first valueRobots allows agent user agentsRequired fieldsSitemap declared in robots.txtschema.org markupAnything visible before an account existsOpenAPI specCredential issuance documentedSignup form fieldsSign-up without a browserPricing without JavaScriptSingle sign-on offeredTiers that route to a sales callPricing as structured dataVerification wallsMCP manifestai-plugin.jsonApproval standing between signup and useWeb Bot Auth signalsAgentic commerce discovery filePayment details demanded up frontsecurity.txtTerms fetchable as textA route forward when something goes wrongHomepage answers an automated fetchCheckout reachable over APIInline validation the browser can enforceA total computable from published prices37 checks across 10 dimensions

The same page, walked twice

A worked example. A person lands on this storefront's homepage, and this is what they meet.

Human doorchrome, javascript on
The Example Store homepage in a browser: a nav of four categories, a winter hero with a Shop the collection button, and three best sellers with prices and stock state.
Agent doorhttp fetch, no javascript
  1. 01GET / 200 OK text/html 212 kB
  2. 02title: Example Store
  3. 03h1: (none found)
  4. 04nav: 4 links, no catalogue feed
  5. 05product: Cutter 154 all-mountain
  6. 06price: (rendered client side)
  7. 07availability: (not stated)
  8. 08add to cart: <button onclick=...>
  9. 09llms.txt: 404
  10. 10robots.txt: disallow GPTBot
  11. 11returns policy: pdf, no text layer
The storefront is intact. The machine-readable one has no price, no stock state, and no way to begin a purchase. Nothing here is broken. It was simply never written for the other visitor.

In this example the human door scores 79 and the agent door 22. The gap is 57, and the storefront looks fine from the front.

What you get back

A number, the evidence behind it, and the three things to fix first.

Ten dimensions, six on the machine's side and four on the visitor's. Anything we could not reach is recorded as not measured. It is never counted as zero.

Read the methodology

35s

A score you can act on

Two funnels, ten dimensions, one composite. Free on any domain you own.

3

Fixes, in priority order

Each with the evidence that raised it and a file you can serve as it is.

10

Dimensions, scored separately

Six on the machine's side, four on the visitor's.

1 day

From a release to an alert

Watched domains are rescanned on a schedule and flagged the day a score drops.

Find out what the machine sees.

Sign up with an email, confirm it, and scan your domain. One free scan a month.

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