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

# Module 2: Authentication

> Build amazing commerce solutions powered by the BigCommerce platform

## Docs

- [Authentication](https://docs.bigcommerce.com/developer/learn/courses/graphql-storefront-api/auth/authentication.md)
- [Querying Within a BigCommerce Storefront](https://docs.bigcommerce.com/developer/learn/courses/graphql-storefront-api/auth/bigcommerce-storefront.md)
- [Querying From External Systems](https://docs.bigcommerce.com/developer/learn/courses/graphql-storefront-api/auth/external-systems.md)
- [Lab - Authentication and Postman Setup](https://docs.bigcommerce.com/developer/learn/courses/graphql-storefront-api/auth/lab-setup.md)