> For the complete documentation index, see [llms.txt](https://klearstack.gitbook.io/klearstack-api-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://klearstack.gitbook.io/klearstack-api-documentation/authentication-and-user-details.md).

# Authentication and User Details

- [Get Access Token](https://klearstack.gitbook.io/klearstack-api-documentation/authentication-and-user-details/get-access-token.md)
- [Get User ID](https://klearstack.gitbook.io/klearstack-api-documentation/authentication-and-user-details/get-user-id.md)
- [Get Access Token From UserID](https://klearstack.gitbook.io/klearstack-api-documentation/authentication-and-user-details/get-access-token-from-userid.md)
- [Get New Access Token Using Existing Refresh Token](https://klearstack.gitbook.io/klearstack-api-documentation/authentication-and-user-details/get-new-access-token-using-existing-refresh-token.md)