curl --request GET \
  --url https://example.com/api/v1/project/{projectSlug}/{env}/outbound-calls/summary \
  --header 'x-api-key: <api-key>'

{
  "success": true,
  "data": {
    "total": 128,
    "answered": 91,
    "inFlight": 3,
    "machineDetected": 7,
    "byOutcome": {
      "completed": 84,
      "no_answer": 22,
      "busy": 4,
      "canceled": 10,
      "failed": 5,
      "rejected": 2,
      "expired": 1
    }
  }
}

{
  "success": false,
  "error": {
    "code": "<string>",
    "message": "<string>",
    "requestId": "<string>"
  }
}

{
  "success": false,
  "error": {
    "code": "<string>",
    "message": "<string>",
    "requestId": "<string>"
  }
}