curl --request POST \
  --url https://api.meetcampfire.com/coa/api/v1/bill/bulk-search \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "bills": [
    {
      "bill_number": "<string>"
    }
  ]
}
'

{}