curl --request PUT \
  --url https://api.qint.ch/api/v1/merchant/account-currency \
  --header 'Content-Type: application/json' \
  --cookie qint_session= \
  --data '
{
  "currency": "EUR"
}
'

const options = {
  method: 'PUT',
  headers: {cookie: 'qint_session=', 'Content-Type': 'application/json'},
  body: JSON.stringify({currency: 'EUR'})
};

fetch('https://api.qint.ch/api/v1/merchant/account-currency', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.qint.ch/api/v1/merchant/account-currency",
  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([
    'currency' => 'EUR'
  ]),
  CURLOPT_COOKIE => "qint_session=",
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

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

curl_close($curl);

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

import requests

url = "https://api.qint.ch/api/v1/merchant/account-currency"

payload = { "currency": "EUR" }
headers = {
    "cookie": "qint_session=",
    "Content-Type": "application/json"
}

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

print(response.text)

{
  "currency": "EUR",
  "setBy": "merchant",
  "setAt": "2026-10-20T13:05:00Z",
  "changeable": true,
  "changeBlocker": null,
  "currencies": [
    "CHF",
    "EUR",
    "USD",
    "GBP"
  ]
}

{
  "title": "An error occurred while processing your request.",
  "status": 400,
  "detail": "GBP is currently disabled on Qint. accountCurrency must be one of: CHF, EUR, USD.",
  "code": "invalid_account_currency"
}

{
  "type": "https://tools.ietf.org/html/rfc9110#section-15.5.1",
  "title": "An error occurred while processing your request.",
  "status": 400,
  "detail": "currency must be one of: CHF, EUR, USD, GBP.",
  "traceId": "00-4bf92f3577b34da6a3ce929d0e0e4736-00f067aa0ba902b7-00"
}

{
  "type": "https://tools.ietf.org/html/rfc9110#section-15.5.1",
  "title": "An error occurred while processing your request.",
  "status": 400,
  "detail": "currency must be one of: CHF, EUR, USD, GBP.",
  "traceId": "00-4bf92f3577b34da6a3ce929d0e0e4736-00f067aa0ba902b7-00"
}