curl --request POST \
  --url https://api.filexpress.app/api/external/v1/projects/{id}/items \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "type": "sale",
  "ids": [
    "9d1c5a3e-4b7f-4e2a-9c1d-2f6b8a0e7c11",
    "3b8e2f10-7c4d-4a9e-b1f2-5d6c7e8f9a01"
  ]
}
'

const options = {
  method: 'POST',
  headers: {'X-API-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    type: 'sale',
    ids: ['9d1c5a3e-4b7f-4e2a-9c1d-2f6b8a0e7c11', '3b8e2f10-7c4d-4a9e-b1f2-5d6c7e8f9a01']
  })
};

fetch('https://api.filexpress.app/api/external/v1/projects/{id}/items', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.filexpress.app/api/external/v1/projects/{id}/items"

payload = {
    "type": "sale",
    "ids": ["9d1c5a3e-4b7f-4e2a-9c1d-2f6b8a0e7c11", "3b8e2f10-7c4d-4a9e-b1f2-5d6c7e8f9a01"]
}
headers = {
    "X-API-Key": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.filexpress.app/api/external/v1/projects/{id}/items",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'type' => 'sale',
    'ids' => [
        '9d1c5a3e-4b7f-4e2a-9c1d-2f6b8a0e7c11',
        '3b8e2f10-7c4d-4a9e-b1f2-5d6c7e8f9a01'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-API-Key: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

{
  "status": true,
  "data": {
    "linked": 2,
    "rejected_ids": [
      "3b8e2f10-7c4d-4a9e-b1f2-5d6c7e8f9a01"
    ],
    "summary": {
      "total_sales": 12000,
      "total_expenses": 6500,
      "total_payroll": 2100,
      "total_work_orders": 400,
      "total_costs": 9000,
      "profit": 3000,
      "margin_percent": 25,
      "budget": 25000,
      "budget_used_percent": 36,
      "counts": {
        "sales": 3,
        "expenses": 8,
        "payrolls": 2,
        "work_orders": 1
      }
    }
  }
}

{
  "status": false,
  "message": "Invalid API Key."
}

{
  "status": false,
  "message": "This integration does not have the 'hr.employees' permission.",
  "required_scope": "hr.employees"
}

{
  "status": false,
  "message": "Project not found"
}

{
  "status": false,
  "message": "Validation errors",
  "errors": {
    "type": [
      "The selected type is invalid."
    ]
  }
}

{
  "status": false,
  "message": "Rate limit exceeded. Please try again later.",
  "rate_limit": 100
}