Why is your site missing an llms.txt file?

Your site returns a 404 error when checking for llms.txt. This file helps AI systems understand how to interact with your content appropriately. You should create one to guide AI crawlers and improve your site's discoverability in AI-powered search results.

What does missing opening content mean for your website?

Your site lacks clear opening content that directly answers what visitors are looking for. This makes it harder for search engines to understand your main purpose. You need introductory text that immediately explains what your site offers.

Why can't search engines access your robots.txt file?

Your robots.txt file returns a 404 error, meaning it's missing or inaccessible. Search engines rely on this file for crawling instructions. You should create a proper robots.txt file to guide how search engines index your content.

How do missing date signals affect your search rankings?

Your content has no publication or update dates visible to search engines. This makes it impossible to determine content freshness, which impacts rankings. You should add clear timestamps to show when content was created or last updated.

Why is content freshness critical for your site's performance?

Search engines can't determine when your content was last updated because there are no date indicators. Fresh content ranks better in search results. You need to add publication dates and update timestamps to improve your visibility.

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Arc Prize SEO & AI Visibility Audit

ARC Prize is a non-profit foundation that creates benchmarks to guide AI research toward artificial general intelligence. It runs annual competitions with cash prizes, challenging researchers and teams to build reasoning systems that solve novel problems and advance measurable progress in AGI development.

arcprize.org

SEO + AEO + E-E-A-T combined

Audited March 06, 2026 · 13 pages analyzed

Overall Scores

Area	Score	Grade
SEO	68%	C
AEO (AI Visibility)	2%	F
E-E-A-T	50%	F
Combined	35%	—

Fastest way to fix your site is to use our Custom Connector for Claude Desktop, or other IDEs.

E-E-A-T Breakdown

Signal	Score	Issue
Trustworthiness	76%	6 security headers missing
Expertise	67%	All checks passing
Authoritativeness	20%	No Organization JSON-LD schema found, No JSON-LD schema types detected, No third-party review or trust signals detected
Experience	9%	No social proof signals detected, Freshness issues, Found 20 headings, Found

Stobo finds what's broken and generates the fixes

Claude Desktop MCP integration settings showing how to add a custom MCP server

Try these in Claude Desktop

stobo my site: arcprize.org

stobo this article: arcprize.org/blog/my-article

Generate a robots.txt for arcprize.org

stobo my blog: arcprize.org/blog

Recommendations

No opening content found AEO
Add a direct answer in the first 40-60 words of the page. AI engines pull from the opening paragraph.
```
stobo this site: arcprize.org
```
Freshness issues: no date signals found AEO
Add date markup (datePublished, dateModified) so AI engines know content is current. Stobo generates the JSON-LD.
```
Generate freshness code for arcprize.org
```
robots.txt not accessible (HTTP 404) AEO
Update robots.txt to allow AI crawlers like GPTBot and ClaudeBot. Stobo generates an AI-friendly version.
```
Generate a robots.txt for arcprize.org
```

Track your score over time

We'll re-audit your site in 7 days and email you what changed. Free, automatic.

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Frequently asked questions

Why is your site missing an llms.txt file?: Your site returns a 404 error when checking for llms.txt. This file helps AI systems understand how to interact with your content appropriately. You should create one to guide AI crawlers and improve your site's discoverability in AI-powered search results.
What does missing opening content mean for your website?: Your site lacks clear opening content that directly answers what visitors are looking for. This makes it harder for search engines to understand your main purpose. You need introductory text that immediately explains what your site offers.
Why can't search engines access your robots.txt file?: Your robots.txt file returns a 404 error, meaning it's missing or inaccessible. Search engines rely on this file for crawling instructions. You should create a proper robots.txt file to guide how search engines index your content.
How do missing date signals affect your search rankings?: Your content has no publication or update dates visible to search engines. This makes it impossible to determine content freshness, which impacts rankings. You should add clear timestamps to show when content was created or last updated.
Why is content freshness critical for your site's performance?: Search engines can't determine when your content was last updated because there are no date indicators. Fresh content ranks better in search results. You need to add publication dates and update timestamps to improve your visibility.

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