> ## Documentation Index
> Fetch the complete documentation index at: https://learn.orbexa.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Custom-built site AI agent setup guide

> Minimum requirements for making custom-built e-commerce sites discoverable by AI agents — structured data, llms.txt, and trust signals.

# Custom-Built Site Setup

If you operate a custom-built e-commerce site (not on Shopify or WooCommerce), here are the minimum requirements for AI agent readiness.

## 5 Must-Have Items

* [ ] **Schema.org Product markup**: Every product page must have JSON-LD format Product markup
* [ ] **llms.txt file**: Place an `llms.txt` file in your website's root directory with a concise description of your brand and products
* [ ] **Sitemap**: An XML Sitemap that includes all product pages, submitted to Google Search Console
* [ ] **SSL certificate**: HTTPS is non-negotiable. AI agents will not trust a site without SSL
* [ ] **robots.txt allows AI crawlers**: Confirm that ChatGPT-User, Claude-Web, and other AI crawlers are not blocked

## 3 Recommended Items

* [ ] **DMARC/SPF/DKIM**: The email authentication trio -- boosts your S dimension trust score
* [ ] **Privacy policy and return policy**: Clear, thorough content. Do not use generic templates
* [ ] **agent.json**: Declare the AI agent capabilities your site supports

## Verification

After completing the configuration above, visit [orbexa.io/verify](https://orbexa.io/verify), enter your domain, and check for score changes.

-> Detailed implementation guides for each item are in [SEO for AI](/en/book-6/index)

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**Next chapter**: [Real-World Case Studies](/en/book-1/ch8-case-studies) -- trust score improvement paths from real domains