> For the complete documentation index, see [llms.txt](https://docs.ggwp.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ggwp.com/identity-and-access-management-iam/api-docs-scim/authentication.md).

# Authentication

### Overview

All SCIM APIs are secured using **Bearer Token authentication**. Each request must include a valid access token in the `Authorization` header.

#### Authentication Method

Header Format

`Authorization: Bearer <API_KEY>`

Example Request Header

`Authorization: Bearer apJwejfwrluo450435hfcCI6IkpXVCJ9...`

### Notes

* Tokens must be included in every request
* Unauthorized requests will return `401 Unauthorized`

### Error Responses

#### 401 Unauthorized

Returned when:

* Token is missing
* Token is invalid