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authentik/website/docs/add-secure-apps/providers/oauth2/device_code.md
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Co-authored-by: Dominic R <dominic@sdko.org>
2026-04-16 17:35:38 +00:00

77 lines
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Markdown

---
title: Device code flow
---
The device code flow is also known as _device flow_ or _device authorization grant flow_. This type of authentication flow is useful for devices with limited input capabilities and/or devices without browsers. The Request for Comments (RFC) 8628) abstract for this flow states:
> The OAuth 2.0 device authorization grant is designed for Internet-connected devices that either lack a browser to perform a user-agent-based authorization or are input constrained to the extent that requiring the user to input text in order to authenticate during the authorization flow is impractical. It enables OAuth clients on such devices (like smart TVs, media consoles, digital picture frames, and printers) to obtain user authorization to access protected resources by using a user agent on a separate device.
### Requirements
This device flow is only possible if the active [brand](../../../sys-mgmt/brands/index.md) has a device code flow configured. This flow is run _after_ the user logs in, and before the user authenticates.
authentik does not include a default flow for this use case, so it is necessary to create a new one with a **Designation** of `Stage Configuration`.
### Device flow initiation
The flow is initiated by sending a POST request to the device authorization endpoint, `/application/o/device/`, with the following contents:
```http
POST /application/o/device/ HTTP/1.1
Host: authentik.company
Content-Type: application/x-www-form-urlencoded
client_id=application_client_id&
scope=openid email my-other-scope
```
Alternatively the client id may be sent via the HTTP Authorization header:
```http
POST /application/o/device/ HTTP/1.1
Host: authentik.company
Content-Type: application/x-www-form-urlencoded
Authorization: Bearer YXBwbGljYXRpb25fY2xpZW50X2lkOg==
scope=openid email my-other-scope
```
The response contains the following fields:
- `device_code`: Device code, which is the code kept on the device
- `verification_uri`: The URL to be shown to the enduser to input the code
- `verification_uri_complete`: The same URL as above except the code will be prefilled
- `user_code`: The raw code for the enduser to input
- `expires_in`: The total seconds after which this token will expire
- `interval`: The interval in seconds for how often the device should check the token status
With this response, the device can start checking the status of the token by sending requests to the token endpoint like this:
```http
POST /application/o/token/ HTTP/1.1
Host: authentik.company
Content-Type: application/x-www-form-urlencoded
grant_type=urn:ietf:params:oauth:grant-type:device_code&
client_id=application_client_id&
device_code=device_code_from_above
```
If the user has not opened the link above yet, or has not finished the authentication and authorization yet, the response will contain an `error` element set to `authorization_pending`. The device should re-send the request in the interval set above.
If the user _has_ finished the authentication and authorization, the response will be similar to any other generic OAuth2 Token request, containing `access_token` and `id_token`.
### Create and apply a device code flow
1. Log in to authentik as an administrator and open the authentik Admin interface.
2. Navigate to **Flows and Stages** > **Flows** and click **New Flow**.
3. Set the following required configurations:
- **Name**: provide a name (e.g. `default-device-code-flow`)
- **Title**: provide a title (e.g. `Device code flow`)
- **Slug**: provide a slug (e.g `default-device-code-flow`)
- **Designation**: `Stage Configuration`
- **Authentication**: `Require authentication`
4. Click **Create**.
5. Navigate to **System** > **Brands** and click the **Edit** icon on the default brand.
6. Set **Default code flow** to the newly created device code flow and click **Update**.