Check your llms.txt and the pages it points to
The Proofsource llms.txt checker finds your llms.txt file, lists the links it gives AI engines and flags the key pages it leaves out, such as pricing. For marketing and web teams who want engines like ChatGPT, Perplexity and Claude to read the right pages, it pairs the check with on-demand page health and content diff audits.
- Found at driffle.ai/llms.txt
- 12 links listed
- Missing: pricing
- Missing: Driffle vs Otter comparison
- 1 link returns a redirect: /features/old-recorder
llms.txt checker, in short
The facts, ready to quote.
- What it checks
- Whether /llms.txt exists, which links it lists and which key pages are missing
- Other audits
- Page health and content diff, run on demand
- Who it is for
- Marketing, SEO and web teams working on AI search
- Fix path
- A Fix llms.txt action turns the gaps into a change you can ship
- Where it runs
- In the Proofsource app and through the API
- Billing
- Charged in credits, only for checks that ran
llms.txt check. Finds your llms.txt, lists the links it gives AI engines and names key pages it leaves out. A Fix llms.txt action turns the gaps into a change.
On-demand site audit checks. Run an llms.txt audit, a content diff or a page health check on demand, in the app or through the API.
What is an llms.txt checker?
llms.txt is a plain text file at the root of a website, like robots.txt, that gives large language models a short, curated map of the site: what the company does and which pages hold the facts worth reading. It is a proposed convention, not a ranking signal any engine has promised to use, but it costs little to publish and it gives AI tools a clean starting point instead of a crawl through navigation menus and scripts.
An llms.txt checker confirms the file is there, reads it the way a model would, and compares it with the pages that matter to buyers. The common problems are a missing file, a file that lists old or broken links, and a file that skips the pages engines get asked about most, such as pricing, product and comparison pages.
Proofsource checks your llms.txt on demand, lists the links it found and names the important pages it misses. The same audit set runs a page health check and a content diff, so you can see whether a page is reachable and readable, and what changed on it since the last read.
How it works
Check your llms.txt file, see which key pages it leaves out, and run page health and content diff audits on demand.
Find the file
Proofsource looks for llms.txt at the root of your domain and reports whether it is there.
Read the links
It lists every link the file gives AI engines and counts them.
Name the gaps
Key pages buyers ask about, like pricing, are flagged when the file leaves them out.
Check page health
Run a page health audit and a content diff on any page to see whether it is readable and what changed.
Fix and recheck
Use Fix llms.txt to draft the change, ship it, then run the check again.
See it in the product
Screens from the Proofsource app, drawn with sample data for an example brand.
| Page | Status | Readable text | Last read |
|---|---|---|---|
| /pricing | 200 OK | Yes | Today |
| /integrations | 200 OK | Partly | Today |
| /blog/meeting-notes-guide | 301 to /guides | Yes | Yesterday |
| /compare/fireflies | 404 | No | Today |
- Added: Free plan includes 300 transcription minutes
- Changed: Pro plan now lists team folders
- Removed: Old FAQ about Zoom recording limits
POST /audit/llms-txt
{"url":"https://driffle.ai"}
200 OK
{
"llms_txt": "found",
"links": 12,
"missing": ["/pricing", "/compare/otter"]
}Who it is for
Ship a correct llms.txt
Publish the file once, then confirm it lists the pages that matter and no dead links.
Add AI checks to the release routine
Run the llms.txt and page health audits after each site release, through the app or the API.
See what changed on key pages
Use the content diff to confirm a pricing or product edit went live before you wait for engines to notice.
Give clients a quick technical win
Show a client the missing pages in their llms.txt and hand over the fix in the same meeting.
Why it matters
A clean map for AI tools
A complete llms.txt points models at your best pages instead of leaving them to guess.
Gaps named, not just scored
You see the exact pages the file leaves out, so the fix is obvious.
On demand, when you change things
Run the checks right after a release instead of waiting for a weekly crawl.
Part of a fix loop
The check sits next to Proofsource answer tracking, so you can see whether fixes move what engines say.
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llms.txt checker: Proofsource and other tools
Several AI visibility and SEO tools now check llms.txt and AI readiness; here is how their public pages describe it next to Proofsource.
| Capability | Proofsource | Peec AI | Semrush | Scrunch | SE Ranking |
|---|---|---|---|---|---|
| llms.txt check | YesFinds the file, lists its links and names missing key pages | YesSitemap, llms.txt and robots.txt crawlability historySource | YesAI Search Health widget checks llms.txtSource | Not listed | Not listed |
| Page health audit | YesOn-demand status, readability and last read per page | RelatedPage-level AI bot crawling, citations and trafficSource | YesAI-readiness site audit, including content length and headersSource | YesAudits flag access controls, JavaScript rendering issues and content gapsSource | YesWebsite audit with 115+ metrics on a scheduleSource |
| Content diff between reads | YesShows what was added, changed or removed on a page | Not listed | Not listed | Not listed | RelatedCompare audits over timeSource |
| Checks tied to AI answer tracking | YesAudits sit next to answers, citations and fixes for the same brand | YesSite checks alongside visibility, sources and actionsSource | YesSite Audit sits in the AI Visibility ToolkitSource | YesSite audit next to presence, citations and sentimentSource | Not listed |
| Fix action from the gaps | YesA Fix llms.txt action turns the gaps into a change you can ship | Not listed | Not listed | RelatedDetects AI bot crawl failures, with fixesSource | Not listed |
| Audit through an API | YesRun the checks in the app or through the API | Not listed | RelatedA Semrush API for its dataSource | Not listed | YesHealth scores, error breakdowns and page listsSource |
| Charged only for checks that ran | YesBilled in credits, only for checks that ran | Not listed | Not listed | Not listed | Not listed |
Where each of them shines
Peec keeps a history of sitemap, llms.txt and robots.txt checks, which is handy for spotting when access changed. Compare in full
Semrush brings a mature site audit with an AI Search Health view and a free tier for AI readiness checks. Compare in full
Scrunch goes deep on rendering and access issues and can serve a machine-readable version of pages to AI agents. Compare in full
SE Ranking runs a site audit of 115+ metrics with scheduled runs, comparisons and exports.
Questions about llms.txt checker
What is llms.txt?
llms.txt is a plain text file at the root of a site that gives AI models a short map of the company and its most useful pages. It is a proposed convention, similar in spirit to robots.txt, and it helps tools that read it start from the right pages.
Do AI engines read llms.txt?
No engine has promised to use llms.txt as a ranking signal. It is cheap to publish and some AI tools and agents read it, so Proofsource treats it as a hygiene check and measures the real effect through what the AI engines you track actually say about you.
What does the Proofsource llms.txt checker report?
It reports whether the file exists, how many links it lists, which links redirect or fail, and which key pages, such as pricing or comparison pages, the file leaves out.
What are the page health and content diff audits?
Page health checks whether a page responds and has readable text. Content diff compares two reads of the same page and lists what was added, changed or removed, so you know an edit is live.
Can I run the checks through the API?
Yes. The llms.txt audit and the other site checks can be triggered through the Proofsource API, so you can run them after each deploy.
How is this different from the Semrush or SE Ranking site audit?
Semrush and SE Ranking run broad site audits across many technical metrics, and Semrush includes an llms.txt check. Proofsource keeps a small set of AI-focused checks next to your answer tracking, so a fix to llms.txt or a page can be tied to what engines say afterward.
Does a missing llms.txt hurt my AI visibility?
Not on its own. Engines mostly read your pages and the sites that cite you. A good llms.txt is a small, low-effort improvement, while clear and crawlable pages matter far more.
How is the check billed?
Checks are charged in credits, and only for checks that ran. A check that does not run is free.
Keep exploring
Try it on your own brand.
Proofsource is live: scan your brand and see llms.txt checker at work with your own answers, competitors and sources.
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