> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.bigcommerce.com/developer/learn/courses/b2b-buyer-portal/custom/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.bigcommerce.com/_mcp/server.

# Module 3: Your Custom Portal

> Build amazing commerce solutions powered by the BigCommerce platform

## Docs

- [The Open Source Buyer Portal](https://docs.bigcommerce.com/developer/learn/courses/b2b-buyer-portal/custom/the-open-source-buyer-portal.md)
- [Lab - Set Up a Custom Buyer Portal](https://docs.bigcommerce.com/developer/learn/courses/b2b-buyer-portal/custom/lab-set-up-a-custom-buyer-portal.md)