> For the complete documentation index, see [llms.txt](https://docs.digitalriver.com/commerce-api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.digitalriver.com/commerce-api/shopper-apis/oauth.md).

# OAuth

- [Authentication](https://docs.digitalriver.com/commerce-api/shopper-apis/oauth/authentication.md): Learn how Commerce API authenticates requests.
- [OAuth 2.0 APIs](https://docs.digitalriver.com/commerce-api/shopper-apis/oauth/oauth-2.0-apis.md): Understand OAuth 2.0 APIs.
- [Token](https://docs.digitalriver.com/commerce-api/shopper-apis/oauth/tokens.md): Learn how to create authenticated shopper tokens.
- [Access tokens](https://docs.digitalriver.com/commerce-api/shopper-apis/oauth/access-tokens.md): Learn how to manage access tokens.
- [Session-aware access tokens](https://docs.digitalriver.com/commerce-api/shopper-apis/oauth/session-aware-access-tokens.md): Learn how to create session-aware access tokens.
- [Authorizing a shopper](https://docs.digitalriver.com/commerce-api/shopper-apis/oauth/authorizing-a-shopper.md): Learn how to authorize a shopper.