# [The Rebilder scanner: a free AI visibility checker for any URL](https://rebilder.com/scan)

> Scan any public https URL for free, with no account: the scanner fetches it the way an agent does and the way a browser does, then scores the difference against the published Agent Readability Spec, showing every check and its evidence.

- **Description:** A free AI visibility checker: see what an AI agent receives from any public URL, scored against the open Agent Readability Spec. No account needed.
- **Organization:** Rebilder

## What is an AI visibility checker?

An AI visibility checker fetches a page the way an AI assistant does and reports what came back. This one requests your URL as an agent and as a browser, compares the two responses, and scores the difference against the published Agent Readability Spec, so you can see which facts an assistant could reach and which it could not.

## Is the scan free, and do I need an account?

It is free and there is no account. Paste any public https URL and the result renders in the browser you ran it from.

## What does the score actually measure?

One hundred points across seven dimensions: retrievability, machine representation, fact coverage, fact position, structured data, contract and discovery, and evidence density. The same dimensions apply to every kind of page; only the expected facts change. Measured checks and heuristic ones are labelled separately wherever they appear.

## Can I scan a site I do not own?

Yes, and the result page for an unclaimed domain stays noindex. No domain enters the index, a ranking or a badge without verified owner opt-in, and removal stays free, self-serve and permanent. Our own comparison pages are the one surface that prints a scan of a named site without its opt-in, and every number there carries its scan date, its ruleset and a link where you can run the same scan yourself.

## How does the scanner identify itself?

It identifies as `rebilder-ars/0.2`, obeys `robots.txt`, keeps to a published request budget and never wears another crawler’s name. The full crawler policy and the opt-out are at [/bots](/bots).

## What do I do with a low score?

Review the evidence and suggested fix for each failed check. Prioritize the gaps that affect your business information, then repeat the scan after making the changes.

## How it scores

One hundred points across seven dimensions — retrievability, machine representation, fact coverage, fact position, structured data, contract & discovery, and evidence density. The same dimensions apply to every page; only the expected facts change by page kind. Measured and heuristic checks are labeled as such wherever they appear.

## What scanning is not

Scanning is not publication. Nothing about a domain without verified owner opt-in is listed, ranked, badged, or indexed, and result pages for unclaimed domains carry noindex. The scanner identifies as rebilder-ars/0.2, obeys robots.txt, and never wears another crawler’s name.

## Related

- [The ARS specification](https://rebilder.com/spec/ars)
- [Crawler policy](https://rebilder.com/bots)