Check your llms.txt against the llmstxt.org format
llms.txt is a Markdown file at the root of a site that gives AI assistants a curated map of it. Citewren fetches /llms.txt and /llms-full.txt and checks what the llmstxt.org format asks for: a # title as the first heading, a > summary line and - [Page](url) link lists. It also catches a common mistake: a site that answers /llms.txt with its HTML home page or 404 page. Pro builds a ready llms.txt draft from your sitemap.
llms.txt problems Citewren reports, word for word
| Problem | Message shown |
|---|---|
| No file | No /llms.txt: AI assistants have no curated map of your site. |
| HTML catch-all | /llms.txt answers with an HTML page (probably a catch-all), not a Markdown file. |
| No title | llms.txt has no "# Title" first heading (required by the llmstxt.org format). |
| No summary | llms.txt has no "> summary" line under the title. |
| No links | llms.txt lists no "- [Page](url)" links. |
Source: Issue messages copied from checkLlms() in products/citewren/worker/src/audit.js.
Citewren vs the alternatives
Published prices, each checked on the date shown; prices change, so confirm on each site.
| Product | Price | Free | Checked |
|---|---|---|---|
| Citewren | Report pass $19 once (30 days); Monitor $9/month | 3 checks a day | live |
| Lumind | GEO Report $19; SEO + GEO Report $49; Premium $99 (one-time) | free AI visibility audit | 2026-10-10 |
| AppearAI | $250 one-time audit | free scanner preview | 2026-10-10 |
Why teams pick Citewren
- Checks the three parts of the llmstxt.org format and reports each missing one in plain words.
- Catches the HTML catch-all: many sites answer every unknown path with a page, so /llms.txt looks present but is not a Markdown file.
- Also checks /llms-full.txt, robots.txt AI crawler rules and structured data in the same run.
- Pro writes the draft: title, summary from your meta description and a page list from your sitemap.
How it works
- Open Citewren and type your site's address.
- Look at the llms.txt line: valid, has problems or missing, with the link count.
- Fix the listed problems, or use the Pro draft, then re-check.
FAQ
Do AI assistants read llms.txt?
llms.txt is a proposed format (llmstxt.org). Support varies by tool; publishing a valid file is cheap and gives assistants a clean map of your site.
Why not just eyeball the file?
You can for the format. Citewren also catches the HTML catch-all case and checks robots.txt, which decides whether AI crawlers can fetch the file at all.
Why not AppearAI?
AppearAI sells a $250 one-time audit of AI visibility. If you need a format check and a draft llms.txt, Citewren is free for 3 checks a day and $19 for a 30-day pass.