> For the complete documentation index, see [llms.txt](https://docs.caf.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.caf.io/caf-api/smart-auth-api/available-resources/authentications.md).

# Authentications

An authentication process may encompass all the validations carried out according to the policy established when the SDK was initialized. These validations and their analyses can include data on the contexts in which the user was situated at the time of the request. Subsequently, based on the defined policy and validation rules, the status of the authentication is determined.

{% hint style="warning" %}
All calls to the API are authenticated and must have the token next to `Bearer` prefix in the `Authorization` header of the request. Calls with a missing or invalid access token will return status code **401** ("Unauthorized").
{% endhint %}

The token used to make requests to the API is the **access token** [generated according to these instructions.](/caf-api/smart-auth-api/authentication.md).

{% openapi src="/files/H5dTTDnxZOlo66R8r7Ar" path="/authentications/{attemptId}" method="get" %}
[authentications-get-one.yaml](https://3218940882-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FbVxCOSyBojfSIE5fcpfH%2Fuploads%2Fgit-blob-67ff1c24e029cba9af68bcc0bea1fd260f525448%2Fauthentications-get-one.yaml?alt=media)
{% endopenapi %}


---

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