Atlas, Outseen’s own research engine for SEO and GEO, investigates a website in four steps: fetching public sources, testing them against fixed technical checks, recording the evidence behind every finding and checking again after a change. Atlas reads the code and technical signals a website returns. The technical core of Atlas works without a language model.
What does Atlas do in each step?
Atlas works in the same order every time. That is what lets you compare two measurements of the same page.
The four steps of an Atlas investigation
- Collect sourcesAtlas fetches the public pages and technical instructions that belong to the investigation: the HTML, the server’s HTTP responses and the site’s robots rules.
- TestEach check asks the source one question, with a fixed criterion. May this page appear in search results? Which URL is given as the preferred version?
- Record the evidenceFor every outcome, Atlas records what it found, in which source, at which URL and when. If information is missing, that is stated too.
- Check againAfter a change, Atlas investigates the same page again, so you can see whether the technical issue has been resolved.
The last step is called a recheck. It only makes sense because the earlier measurement was recorded: you compare the same check on the same URL before and after the change.
What does Atlas investigate?
| Area | What Atlas investigates | What it tells you |
|---|---|---|
| Page structure | Titles, descriptions, language, headings and link text in the HTML | You see missing or duplicate titles and descriptions, and empty headings or link text |
| Access and indexing | HTTP responses, robots rules and indexing instructions in code and headers | You know whether a technical setting restricts access or indexing |
| Preferred URLs | Canonicals and what their target page actually returns | You find canonicals that point to an error page, a redirect or a noindex |
| Internal structure | Links and language references between the fetched pages | You find links to unreachable addresses and conflicting language references |
| Structured data | Readability and supported fields of JSON-LD, such as product and breadcrumb | You see technical errors or missing fields in that data |
| Evidence | Source and time of measurement behind every finding | You can trace what a piece of advice rests on and recheck in a targeted way after a change |
A general list of technical points is in the technical SEO checklist.
What does a finding look like?
A technical finding in Atlas always has the same fields. This is a real Atlas check on Outseen’s own test site.
| Field | Value |
|---|---|
| Check | May this page appear in search results? |
| Check type | Indexing instructions |
| Page | https://atlas-fixture-staging.outseen.io/ |
| Source | HTTP header X-Robots-Tag |
| Observed | noindex |
| Outcome | Needs attention |
| Measured | 11 November 2026, 10:14 (UTC) |
| Engine | atlas-engine/0.3.12 |
| Next step | The specialist checks whether this page belongs in search results. If the block is unintended, we remove it and let Atlas measure again. |
A noindex in the X-Robots-Tag header asks search engines not to include a page, just like the same instruction in a meta tag in the HTML. Google explains both forms in Block search indexing with noindex. You cannot see a header like this on the page itself, only in the server’s response. Simplified, it looks like this:
HTTP/1.1 200 OK
Content-Type: text/html; charset=utf-8
X-Robots-Tag: noindexSo the page loads normally for a visitor, while search engines are asked not to include it. A header like this can be left behind after a test period, for example, or come from a setting at your hosting provider. Why a page can be missing for this and other reasons is covered in Why is my page not showing in Google?
Because the source is part of the finding, you can trace it yourself:
Tracing a finding yourself
- Open the URL from the finding in your browser
- Open the developer tools and choose the Network tab
- Reload the page and click the first request
- Look for X-Robots-Tag among the response headers
- Also view the page source and search for
name="robots" - Compare the result with URL Inspection in Google Search Console
This check says something about indexing. It says nothing about your position in Google or about mentions in AI answers, and it proves nothing about the quality of the rest of the website.
Is Atlas an AI model?
No. Atlas is a research engine with defined checks: its technical core fetches sources, runs checks and links every finding to its source. That needs no language model. Outseen uses AI as a work aid, for example when working up existing information. Text generated by AI never counts as evidence of a measurement. How that works in practice is described in how we use AI. Like other software, an engine can have limited coverage or errors; that is why Atlas records what each outcome rests on, so it can be checked.
What does the specialist do?
Atlas collects and tests. The Outseen specialist assesses the findings and decides what happens next. Not every finding is a mistake: a noindex on a thank-you page is often exactly what was intended. The specialist takes your offer, your customers and your priorities into account and is responsible for the advice and the work on your website.
What does Atlas not investigate?
Atlas works with what a website returns publicly. Anything beyond that falls outside the investigation.
Inside and outside an Atlas investigation
| Atlas investigates | Atlas does not investigate | |
|---|---|---|
| Code | What your server returns | Private server code |
| Markup | The HTML a page delivers | The original templates of your theme or CMS |
| JavaScript | The HTML as the server sends it | Content that only appears after JavaScript |
| Scope | The pages that belong to the agreed investigation | The entire website |
| Outcome | Technical signals with source and time of measurement | Rankings in Google and mentions in AI answers |
On JavaScript: Google recommends making important content available without JavaScript too, because not every bot can run JavaScript (JavaScript SEO basics). More on this in Can AI crawlers read your website? Outseen checks AI answers separately, by hand, with agreed questions, environment and time of measurement.
Website check or audit?
Atlas is used in both, at a different scale.
| Website check | Audit | |
|---|---|---|
| Scope | Your homepage and at most two other pages, plus a short AI result (six questions to ChatGPT and Gemini) | Agreed pages and topics |
| Who assesses | Atlas returns the available findings | Atlas investigates the technical side, and specialists also assess content and structure |
| What you get | A first impression, with the results by email | An assessment of the content and a plan with priorities |
Run the website check for a first impression, or read what an audit covers.
A dedicated development team works on the engine around the clock; more on that in the team behind Atlas. The team follows official documentation from Google, Bing, OpenAI and Anthropic and tests new checks before they are put to use. Outseen has no partnership with those companies and no knowledge of secret algorithms. The team works with what the providers publish themselves.
What does this mean for your business?
You can check an Atlas finding yourself, because the source, the URL and the time of measurement are part of it. Ask of every piece of technical advice, from whoever it comes, what it rests on: which page, which source, which moment. Advice without those details cannot be traced, and cannot be measured again after a change.
Know too what a technical check does not tell you. A page without findings can still rank low in Google or appear in no AI answer at all. Atlas shows whether the technical side is holding a page back; whether the content persuades customers is something a specialist assesses separately.