curl --request GET \
  --url https://api.heffl.com/api/v1/pipelines \
  --header 'x-api-key: <api-key>'

{
  "items": [
    {
      "id": 123,
      "name": "<string>",
      "stages": [
        {
          "id": 123,
          "name": "<string>",
          "position": 123,
          "probability": 123
        }
      ]
    }
  ]
}