Why can't search engines find your site's llms.txt file?

Your site returns a 404 error when search engines look for llms.txt. This file helps AI systems understand how to interact with your content. Without it, AI crawlers can't access important guidelines about your site's content usage policies.

What does missing opening content mean for your site's search visibility?

Your pages lack clear opening content that directly answers user queries. Search engines rely on this content to understand what your page is about. Missing opening content makes it harder for your site to appear in direct answer results.

How does an inaccessible robots.txt file affect your site's crawling?

Your robots.txt file returns a 404 error, preventing search engines from reading your crawling instructions. This creates uncertainty about which pages should be crawled. Search engines may crawl pages you don't want indexed or skip important content.

Why are date signals important for your website's content freshness?

Your content lacks publication or update dates, making it impossible for search engines to assess freshness. Date signals help search engines understand when content was created or last modified. This affects how your content ranks for time-sensitive queries.

How do missing date signals impact your site's search engine rankings?

Search engines can't determine when your content was published or updated without date signals. This hurts your rankings for topics where freshness matters. Users also can't tell if your information is current, reducing trust and click-through rates.

‹ See all YC W26 audits

Mantis SEO & AI Visibility Audit

mantisbiotech.com

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

Audited March 06, 2026 · 0 pages analyzed

Overall Scores

Area	Score	Grade
SEO	62%	D
AEO (AI Visibility)	2%	F
E-E-A-T	20%	F
Combined	32%	—

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	27%	HTTPS properly configured, No about/team page, social profiles, or LinkedIn links detected, No privacy policy link detected, 6 security headers missing, No terms of service link detected, No contact transparency signals detected
Expertise	13%	54 words, 0 headings, 0 outbound links
Authoritativeness	20%	No Organization JSON-LD schema found, No JSON-LD schema types detected, No third-party review or trust signals detected
Experience	0%	No social proof signals detected, Freshness issues, No headings found on page, No first-hand experience signals detected

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: mantisbiotech.com

stobo this article: mantisbiotech.com/blog/my-article

Generate a robots.txt for mantisbiotech.com

stobo my blog: mantisbiotech.com/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: mantisbiotech.com
```
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 mantisbiotech.com
```
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 mantisbiotech.com
```

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Frequently asked questions

Why can't search engines find your site's llms.txt file?: Your site returns a 404 error when search engines look for llms.txt. This file helps AI systems understand how to interact with your content. Without it, AI crawlers can't access important guidelines about your site's content usage policies.
What does missing opening content mean for your site's search visibility?: Your pages lack clear opening content that directly answers user queries. Search engines rely on this content to understand what your page is about. Missing opening content makes it harder for your site to appear in direct answer results.
How does an inaccessible robots.txt file affect your site's crawling?: Your robots.txt file returns a 404 error, preventing search engines from reading your crawling instructions. This creates uncertainty about which pages should be crawled. Search engines may crawl pages you don't want indexed or skip important content.
Why are date signals important for your website's content freshness?: Your content lacks publication or update dates, making it impossible for search engines to assess freshness. Date signals help search engines understand when content was created or last modified. This affects how your content ranks for time-sensitive queries.
How do missing date signals impact your site's search engine rankings?: Search engines can't determine when your content was published or updated without date signals. This hurts your rankings for topics where freshness matters. Users also can't tell if your information is current, reducing trust and click-through rates.

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