curl --request GET \
  --url https://api.gcore.com/cloud/v1/networks/{project_id}/{region_id}/{network_id}/ports \
  --header 'Authorization: <api-key>'

{
  "count": 1,
  "results": [
    {
      "id": "8e009163-d526-4351-9266-93d9fd8fa8ef",
      "instance_id": "bfc7824b-31b6-4a28-a0c4-7df137139215",
      "instance_name": "instance_1"
    }
  ]
}