curl --request PUT \
  --url https://api.filexpress.app/api/external/v1/treasury/petty-cashes/{id} \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "observations": "Responsable: gerencia"
}
'

const options = {
  method: 'PUT',
  headers: {'X-API-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({observations: 'Responsable: gerencia'})
};

fetch('https://api.filexpress.app/api/external/v1/treasury/petty-cashes/{id}', 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/treasury/petty-cashes/{id}"

payload = { "observations": "Responsable: gerencia" }
headers = {
    "X-API-Key": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.put(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/treasury/petty-cashes/{id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PUT",
  CURLOPT_POSTFIELDS => json_encode([
    'observations' => 'Responsable: gerencia'
  ]),
  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": {
    "id": "9d1c5a3e-4b7f-4e2a-9c1d-2f6b8a0e7c11",
    "name": "Caja chica Sucursal Centro",
    "balance": 250,
    "account_id": "3b8e2f10-7c4d-4a9e-b1f2-5d6c7e8f9a01",
    "observations": "Administración"
  }
}

{
  "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": "Petty cash not found"
}

{
  "status": false,
  "message": "Validation errors",
  "errors": {
    "account_id": "La cuenta 1101 tiene subcuentas; use una cuenta de movimiento."
  }
}

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