> 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-core/purchasing/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.bigcommerce.com/_mcp/server.

# Module 4: Purchasing Workflow

> Build amazing commerce solutions powered by the BigCommerce platform

## Docs

- [Purchasing Entities and Relationships](https://docs.bigcommerce.com/developer/learn/courses/b2b-core/purchasing/purchasing-entities.md)
- [REST API - Shopping Lists and Quotes](https://docs.bigcommerce.com/developer/learn/courses/b2b-core/purchasing/rest-lists-quotes.md)
- [REST API - Orders, Invoices, and Payments](https://docs.bigcommerce.com/developer/learn/courses/b2b-core/purchasing/rest-orders-payments.md)
- [Lab - Postman Quote and Order Workflow](https://docs.bigcommerce.com/developer/learn/courses/b2b-core/purchasing/lab-quote-order.md)
- [Lab - Postman Invoices and Payments Workflow](https://docs.bigcommerce.com/developer/learn/courses/b2b-core/purchasing/lab-invoices-payments.md)