LLMs.txt Validator Report for openai.com
AI discoverability, crawler accessibility, llms.txt structure, and LLM readiness signals for openai.com.
Report Summary
Source checked: https://openai.com/llms.txt
Checked at 2026-06-04T21:00:23.818Z.
Parsed Preview
Title, sections, documentation links, API references, and resources extracted from llms.txt.
No parsed content yet.
Improve AI Discoverability
Turn llms.txt into infrastructure for AI assistants, AI search engines, and LLM-powered crawlers.
AI Readiness Score
Recommendations
Prioritized fixes for AI search visibility, crawler accessibility, and LLM readiness.
Slow response time
AvailabilityKeep llms.txt lightweight and cacheable for crawlers.
Content-Type is not plain text
FormatServe llms.txt as text/plain; charset=utf-8.
About section missing
StructureAdd a ## About section to help AI systems navigate your site.
Documentation section missing
StructureAdd a ## Documentation section to help AI systems navigate your site.
APIs section missing
StructureAdd a ## APIs section to help AI systems navigate your site.
Resources section missing
StructureAdd a ## Resources section to help AI systems navigate your site.
Validation Results
Availability, format, structure, links, discoverability, and AI readiness checks.
Errors
2Missing llms.txt file
Availabilityhttp.statusThe expected llms.txt endpoint returned HTTP 404.
Suggested fix: Publish llms.txt at the site root, such as https://example.com/llms.txt.
Missing title
Structure# titlellms.txt should start with a single # Title heading.
Suggested fix: Add a top-level heading such as # Example Company.
Warnings
9Slow response time
Availabilityhttp.responseTimeMsThe endpoint took 2711ms to respond.
Suggested fix: Keep llms.txt lightweight and cacheable for crawlers.
Content-Type is not plain text
Formathttp.contentTypeContent-Type is text/html; charset=utf-8.
Suggested fix: Serve llms.txt as text/plain; charset=utf-8.
About section missing
Structure## AboutThe recommended ## About section was not found.
Suggested fix: Add a ## About section to help AI systems navigate your site.
Documentation section missing
Structure## DocumentationThe recommended ## Documentation section was not found.
Suggested fix: Add a ## Documentation section to help AI systems navigate your site.
APIs section missing
Structure## APIsThe recommended ## APIs section was not found.
Suggested fix: Add a ## APIs section to help AI systems navigate your site.
Resources section missing
Structure## ResourcesThe recommended ## Resources section was not found.
Suggested fix: Add a ## Resources section to help AI systems navigate your site.
No links found
LinksAI systems need documentation, API, resource, and support links to understand your site.
Suggested fix: Add HTTPS links to important docs, APIs, resources, and support pages.
Company or product context is thin
AI DiscoverabilityAI assistants need a concise explanation of who you are and what the product does.
Suggested fix: Use ## About to describe the company, product, audience, and key use cases.
No documentation links found
AI DiscoverabilityThe file does not clearly point to documentation pages.
Suggested fix: Add documentation, guides, or reference links under ## Documentation.
Recommendations
7Contact section missing
Structure## ContactThe recommended ## Contact section was not found.
Suggested fix: Add a ## Contact section to help AI systems navigate your site.
API references missing
AI DiscoverabilityNo API, OpenAPI, Swagger, GraphQL, or developer links were detected.
Suggested fix: Add API documentation or OpenAPI schema references under ## APIs.
Support resources missing
AI DiscoverabilityResource links help agents find changelogs, status pages, examples, and support material.
Suggested fix: Add useful support, status, examples, or resource links under ## Resources.
Contact information missing
AI DiscoverabilityAI systems and developers benefit from a support or contact path.
Suggested fix: Add a support URL or contact email under ## Contact.
JSON-LD not detected
AI ReadinessNo structured metadata was detected on the homepage.
Suggested fix: Add JSON-LD Organization, WebSite, SoftwareApplication, or Product metadata.
Agent Card not detected
AI ReadinessNo Agent Card discovery file was detected.
Suggested fix: Publish /.well-known/agent-card.json for agent-native discovery.
OpenAPI schema not detected
AI ReadinessNo OpenAPI or Swagger schema was found in llms.txt or common schema paths.
Suggested fix: Add an OpenAPI schema URL under ## APIs.
Success checks
8llms.txt URL checked
AvailabilitysourceUrlChecked https://openai.com/llms.txt.
HTTPS enabled
AvailabilitysourceUrlThe llms.txt endpoint is served over HTTPS.
No redirect required
Availabilityhttp.redirectCountThe llms.txt endpoint was reached directly.
UTF-8 compatible
FormatencodingThe file is readable as UTF-8 text.
Reasonable file size
Formatfile.sizeThe file size is within the recommended 256KB envelope.
Line endings are valid
FormatlineEndingsLine endings are consistent and parser-friendly.
robots.txt detected
AI Readinessrobots.txt is available as an additional readiness signal.
sitemap.xml detected
AI Readinesssitemap.xml is available as an additional readiness signal.