These are special promotions that are applicable to cart and catalog items - promotion engine. This category contains APIs to manage and retrieve cart and catalog promotions.
To use cart promotions, you need to first generate an authentication token as an admin using the /arya API and then use the BearerToken authentication to make API calls.
You can also pass the token as header. For example, access token is xyz, then pass the header AUTH-COOKIE with value Bearer xyz
Note that only admins can make these promotion API calls.