curl --request GET \
  --url https://discord.com/api/v10/applications/{application_id}/guilds/{guild_id}/commands/permissions \
  --header 'Authorization: <api-key>'

[
  {
    "id": "<string>",
    "application_id": "<string>",
    "guild_id": "<string>",
    "permissions": [
      {
        "id": "<string>",
        "type": 123,
        "permission": true
      }
    ]
  }
]