curl --request POST \
  --url https://api.business-os.de/v2/banking/connect \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "email": "info@mustermann.de",
  "return_to": "https://app.business-os.de/close",
  "scopes": [
    "accounts",
    "holder_info",
    "transactions"
  ],
  "custom_fields": {}
}
'

import requests

url = "https://api.business-os.de/v2/banking/connect"

payload = {
    "email": "info@mustermann.de",
    "return_to": "https://app.business-os.de/close",
    "scopes": ["accounts", "holder_info", "transactions"],
    "custom_fields": {}
}
headers = {
    "x-api-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    email: 'info@mustermann.de',
    return_to: 'https://app.business-os.de/close',
    scopes: ['accounts', 'holder_info', 'transactions'],
    custom_fields: {}
  })
};

fetch('https://api.business-os.de/v2/banking/connect', 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.business-os.de/v2/banking/connect",
  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([
    'email' => 'info@mustermann.de',
    'return_to' => 'https://app.business-os.de/close',
    'scopes' => [
        'accounts',
        'holder_info',
        'transactions'
    ],
    'custom_fields' => [
        
    ]
  ]),
  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;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.business-os.de/v2/banking/connect"

	payload := strings.NewReader("{\n  \"email\": \"info@mustermann.de\",\n  \"return_to\": \"https://app.business-os.de/close\",\n  \"scopes\": [\n    \"accounts\",\n    \"holder_info\",\n    \"transactions\"\n  ],\n  \"custom_fields\": {}\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("x-api-key", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.business-os.de/v2/banking/connect")
  .header("x-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"email\": \"info@mustermann.de\",\n  \"return_to\": \"https://app.business-os.de/close\",\n  \"scopes\": [\n    \"accounts\",\n    \"holder_info\",\n    \"transactions\"\n  ],\n  \"custom_fields\": {}\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.business-os.de/v2/banking/connect")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"email\": \"info@mustermann.de\",\n  \"return_to\": \"https://app.business-os.de/close\",\n  \"scopes\": [\n    \"accounts\",\n    \"holder_info\",\n    \"transactions\"\n  ],\n  \"custom_fields\": {}\n}"

response = http.request(request)
puts response.read_body

{
  "connect_url": "https://psd2.business-os.de/connect?token=xxx",
  "expires_at": "2026-03-24T12:44:03Z",
  "owner_user_id": "d90f20ae-f6c1-46da-a080-3d4c86329bf6",
  "pending_token": "8c4a8b18-9b7c-4f9d-9a3e-1a2b3c4d5e6f"
}