const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch('https://api.phaseo.app/v1/batches/{batch_id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "id": "<string>",
  "object": "<string>",
  "endpoint": "<string>",
  "errors": {},
  "input_file_id": "<string>",
  "completion_window": "<string>",
  "status": "<string>",
  "output_file_id": "<string>",
  "error_file_id": "<string>",
  "created_at": 123,
  "in_progress_at": 123,
  "expires_at": 123,
  "finalizing_at": 123,
  "completed_at": 123,
  "failed_at": 123,
  "expired_at": 123,
  "cancelling_at": 123,
  "cancelled_at": 123,
  "request_counts": {
    "total": 123,
    "completed": 123,
    "failed": 123
  },
  "metadata": {},
  "request_id": "<string>",
  "provider": "<string>",
  "session_id": "<string>",
  "webhook": {
    "url": "<string>",
    "secret": "<string>",
    "events": [
      "<string>"
    ]
  },
  "pricing_lines": [
    {}
  ],
  "billing": {
    "billed": true,
    "charged": true,
    "reason": "<string>",
    "cost_nanos": 123,
    "cost_usd": 123,
    "finalized_at": "<string>",
    "pricing_breakdown": {}
  }
}