OAuth 2 Device Authorization Flow

Authorization Token Retrieval Method for Applications Without HTTP or Deep Link Callbacks

This method is ideal for applications that can't process HTTP or deep link callbacks. It involves multiple stages:

1. Obtain the authorization URL for the user.

2. Open the browser for the user, or instruct them to open it using the provided link.

3. While the user is granting access, the application should poll for the token in the background.

4. After the user grants access, the application will receive the OAuth token.

This approach is effective for games, mods, and other applications that cannot handle deep link redirects.

Initiate Device Authorization Session

To get an access token, send an HTTP POST request to https://pulsoid.net/oauth2/device_authorization. Set the following x-www-form-urlencoded parameters:

• client_id equals to your application's client id

• scope equals to desired comma separate scope.

Example request

curl --request POST \
  --url https://pulsoid.net/oauth2/device_authorization \
  --header 'content-type: application/x-www-form-urlencoded' \
  --data client_id=ad9e3778-347f-4aec-9ec6-98b0d353f6f9 \
  --data 'scope="data:heart_rate:read"'

Example response

{
  "device_code": "2c169147-c761-4691-accd-00c702cf3b60",
  "user_code": "32761c50-bc77-422d-b1d8-dadae4b9ef37",
  "verification_uri": "https://pulsoid.net/oauth2/device_authorization_consent",
  "verification_uri_complete": "https://pulsoid.net/oauth2/device_authorization_consent?user_code=32761c50-bc77-422d-b1d8-dadae4b9ef37",
  "expires_in": 600,
  "interval": 3
}

Your application should open the URL located in verification_uri_complete or prompt the user to open this URL. On this page, the user will be able to grant or deny access.

Concurrently, the application should run a background process that attempts to obtain an access token using the device_code at the specified interval(in seconds), continuing until the expires_in(in seconds) duration has elapsed.

Obtain Token

To obtain an access token, the application should execute an HTTP POST request to https://pulsoid.net/oauth2/token. Set the following x-www-form-urlencoded parameters:

• grant_type equals urn:ietf:params:oauth:grant-type:device_code

• device_code equals the one from the previous step

• client_id equals your application's client ID

Example Request

curl --request POST \
  --url https://pulsoid.net/oauth2/token \
  --header 'content-type: application/x-www-form-urlencoded' \
  --data 'grant_type="urn:ietf:params:oauth:grant-type:device_code"' \
  --data device_code=2c169147-c761-4691-accd-00c702cf3b60 \
  --data client_id=ad9e3778-347f-4aec-9ec6-98b0d353f6f9

Result to this request will describe what to do next

200 OK response means that granting is successful

Example of response

{
  "access_token": "02a61b22-1c7e-477d-98ed-96f4aef7d5ad",
  "expires_in": 1261440000,
  "token_type": "bearer"
}

400 Bad Request

The response in this case will be a json in the following format

{
  "error": "some error",
  "error_description": null
}

The most important fields here are the error fields, which signal the next step. These fields can be one of the following:

• authorization_pending: This means your application should keep trying to obtain a token.

• invalid_grant (with error_description: user didn't grant access): This indicates that the user didn't grant access to your application, and the polling process should be stopped.

• invalid_grant (with error_description: access token already issued): This means that a token was already obtained for the given device_code, and the polling process should be stopped.

• expired_token: This means the device_code has expired, and the polling process should be stopped.