curl -X GET https://api.mailofly.com/segments \
  -H "Authorization: Bearer mf_live_your_api_key"

{
  "data": [
    {
      "id": "seg_123",
      "name": "High-Value Customers",
      "type": "dynamic",
      "contactsCount": 142
    },
    {
      "id": "seg_456",
      "name": "Newsletter Subscribers",
      "type": "manual",
      "contactsCount": 850
    }
  ]
}