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

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