llms.txt and AI Crawler Setup
llms.txt is a plain-text file at your site root that indexes your key pages with short descriptions, built specifically so AI crawlers can parse your site's structure quickly instead of crawling everything blind. We write yours, and we configure robots.txt to name every AI crawler that actually matters, since a missing or default-blocking rule silently keeps entire engines from citing you at all.
Key Facts
- Focus
- llms.txt setup
- Category
- GTM Stack
- Defined outputs
- 5 deliverables
- Regions served
- India · United States · United Kingdom · UAE · Singapore
- Last reviewed
- 2026-09-10
Your robots.txt Was Last Touched Before These Crawlers Existed
Most robots.txt files on the web were written for search engine and scraper management years before GPTBot, ClaudeBot or PerplexityBot existed. A broad disallow rule written to stop generic scrapers often blocks these crawlers by accident, with nobody noticing because there is no error message, the crawler just quietly gets nothing. llms.txt is newer still and is not yet an enforced standard, there is no official body ratifying it as of 2026, but major sites are adopting it as a practical convention because it gives an AI crawler a fast, structured map instead of forcing it to guess your site's architecture.
There is no visible failure mode when a crawler is blocked. Your site keeps working normally for human visitors and for Googlebot, so a robots.txt mistake here can sit unnoticed for years.
llms.txt is not a technical standard with a validator or a governing spec yet, it is a convention, which means the file has to be genuinely useful, an accurate index with real descriptions, not a token gesture that nothing actually reads carefully.
Crawler names are specific and easy to get wrong. GPTBot and OAI-SearchBot are both OpenAI's but serve different purposes; Claude-User, ClaudeBot and Claude-SearchBot are three separate Anthropic crawlers with different roles. Allowing one and assuming it covers the others is a common mistake.
What We Set Up
Full Named-Crawler Audit of robots.txt
We check your existing robots.txt against the full current list: GPTBot, OAI-SearchBot and ChatGPT-User for OpenAI, ClaudeBot, Claude-User and Claude-SearchBot and anthropic-ai for Anthropic, PerplexityBot and Perplexity-User for Perplexity, Google-Extended for Google's AI training crawler, Applebot-Extended for Apple Intelligence, plus Bingbot, meta-externalagent and Amazonbot. We correct any rule that blocks these, intentionally or by accident, and rewrite the file to allow each one explicitly.
Build an llms.txt That Is Actually Useful
We index your genuinely important pages, not every URL on the site, with a short, accurate description of each. A model deciding whether to crawl further reads this file first; a padded or generic version wastes that first impression.
Wire It Into Your Build Process
For sites that publish new pages regularly, a hand-maintained llms.txt goes stale fast. We set up generation as part of your existing build or CMS process where possible, so new key pages get added automatically instead of depending on someone remembering.
Verify Access, Not Just Configuration
A correct robots.txt on paper is not the same as confirmed access. We check server logs or use available crawler-verification tools where possible to confirm these bots are actually reaching the site after the change, not just theoretically allowed to.
Deliverables
- A corrected robots.txt with every named AI crawler explicitly allowed or intentionally excluded
- A generated llms.txt file indexing your key pages with accurate, specific descriptions
- Build or CMS integration so llms.txt stays current as you publish new pages, where your stack supports it
- A verification pass confirming crawler access post-change
- Documentation of what was changed and why, so a future update does not accidentally revert it
Is This You?
Strong fit
- You have a robots.txt file that predates 2023 and has not been reviewed since, which describes most sites we look at.
- You publish content regularly and want AI crawler access and llms.txt maintenance handled as part of your build process rather than manually.
- You already know you want AI citations and just need the underlying access and configuration done correctly once.
Not a fit yet
- You actively do not want your content used to train AI models. That is a legitimate position, and the right move is deliberately keeping training-oriented crawlers like GPTBot and Google-Extended disallowed, which we can also help configure correctly.
- You have no site yet. This is a configuration service for an existing, publicly reachable site.
Get Every Crawler Named Correctly, Once
Send us your current robots.txt and we will tell you exactly which AI crawlers are blocked, intentionally or not, before we touch anything.
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Common Questions
Is llms.txt actually required for AI citations?
No engine currently requires it, and it is not an official W3C or IETF standard as of 2026, it is a de facto convention. What it does is give a crawler a fast, structured map of your important pages instead of forcing a full crawl to figure out your site's architecture. We implement it on our own site for exactly this reason, alongside the crawler allow rules, since it costs little and the adoption trend among major sites is toward including one.
What is the actual difference between GPTBot and OAI-SearchBot?
GPTBot is OpenAI's general-purpose crawler, used mainly to collect content, historically associated with model training data collection. OAI-SearchBot is tied more specifically to live search and browsing features inside ChatGPT. Blocking one and not the other has a real, different effect, so both need explicit rules rather than a single combined assumption.
Will allowing these crawlers let AI models train on our content for free?
Some of them, yes, that is what a crawler like GPTBot or Google-Extended is generally for, separate from the search-oriented crawlers. If you want citation and search visibility without opting into training data collection, you can allow the search-specific crawlers, OAI-SearchBot, Perplexity-User, and disallow the training-oriented ones. We set this up according to your actual preference rather than a blanket allow-all.
Does this replace ongoing AEO work, or is it a one-time fix?
It is a one-time technical fix: once robots.txt and llms.txt are correct, they generally stay correct unless something else in your infrastructure changes them. If you want the broader, ongoing work, content structure, schema, monitoring citations over time, that is what our AEO and GEO service line covers, separate from this setup.
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