curl --request POST \
  --url https://api.sandbox.finsei.com/v2/beneficiary \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "currency": "EUR",
  "iban": "NL13RABO4448094871",
  "entity_type": "company",
  "uuid": "<string>",
  "name": "Aliaksandr",
  "bank_country": "LT",
  "bic_swift": "AGBLLT2X",
  "account_number": 123,
  "sort_code": 123,
  "street": "Gagarina street",
  "house": 22,
  "city": "London",
  "country_id": "GB",
  "postal_code": 10001,
  "company_name": "Finsei Ltd.",
  "first_name": "Aliaksandr",
  "last_name": "Lastname"
}
'

import requests

url = "https://api.sandbox.finsei.com/v2/beneficiary"

payload = {
    "currency": "EUR",
    "iban": "NL13RABO4448094871",
    "entity_type": "company",
    "uuid": "<string>",
    "name": "Aliaksandr",
    "bank_country": "LT",
    "bic_swift": "AGBLLT2X",
    "account_number": 123,
    "sort_code": 123,
    "street": "Gagarina street",
    "house": 22,
    "city": "London",
    "country_id": "GB",
    "postal_code": 10001,
    "company_name": "Finsei Ltd.",
    "first_name": "Aliaksandr",
    "last_name": "Lastname"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    currency: 'EUR',
    iban: 'NL13RABO4448094871',
    entity_type: 'company',
    uuid: '<string>',
    name: 'Aliaksandr',
    bank_country: 'LT',
    bic_swift: 'AGBLLT2X',
    account_number: 123,
    sort_code: 123,
    street: 'Gagarina street',
    house: 22,
    city: 'London',
    country_id: 'GB',
    postal_code: 10001,
    company_name: 'Finsei Ltd.',
    first_name: 'Aliaksandr',
    last_name: 'Lastname'
  })
};

fetch('https://api.sandbox.finsei.com/v2/beneficiary', 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.sandbox.finsei.com/v2/beneficiary",
  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([
    'currency' => 'EUR',
    'iban' => 'NL13RABO4448094871',
    'entity_type' => 'company',
    'uuid' => '<string>',
    'name' => 'Aliaksandr',
    'bank_country' => 'LT',
    'bic_swift' => 'AGBLLT2X',
    'account_number' => 123,
    'sort_code' => 123,
    'street' => 'Gagarina street',
    'house' => 22,
    'city' => 'London',
    'country_id' => 'GB',
    'postal_code' => 10001,
    'company_name' => 'Finsei Ltd.',
    'first_name' => 'Aliaksandr',
    'last_name' => 'Lastname'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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.sandbox.finsei.com/v2/beneficiary"

	payload := strings.NewReader("{\n  \"currency\": \"EUR\",\n  \"iban\": \"NL13RABO4448094871\",\n  \"entity_type\": \"company\",\n  \"uuid\": \"<string>\",\n  \"name\": \"Aliaksandr\",\n  \"bank_country\": \"LT\",\n  \"bic_swift\": \"AGBLLT2X\",\n  \"account_number\": 123,\n  \"sort_code\": 123,\n  \"street\": \"Gagarina street\",\n  \"house\": 22,\n  \"city\": \"London\",\n  \"country_id\": \"GB\",\n  \"postal_code\": 10001,\n  \"company_name\": \"Finsei Ltd.\",\n  \"first_name\": \"Aliaksandr\",\n  \"last_name\": \"Lastname\"\n}")

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

	req.Header.Add("Authorization", "Bearer <token>")
	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.sandbox.finsei.com/v2/beneficiary")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"currency\": \"EUR\",\n  \"iban\": \"NL13RABO4448094871\",\n  \"entity_type\": \"company\",\n  \"uuid\": \"<string>\",\n  \"name\": \"Aliaksandr\",\n  \"bank_country\": \"LT\",\n  \"bic_swift\": \"AGBLLT2X\",\n  \"account_number\": 123,\n  \"sort_code\": 123,\n  \"street\": \"Gagarina street\",\n  \"house\": 22,\n  \"city\": \"London\",\n  \"country_id\": \"GB\",\n  \"postal_code\": 10001,\n  \"company_name\": \"Finsei Ltd.\",\n  \"first_name\": \"Aliaksandr\",\n  \"last_name\": \"Lastname\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.sandbox.finsei.com/v2/beneficiary")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"currency\": \"EUR\",\n  \"iban\": \"NL13RABO4448094871\",\n  \"entity_type\": \"company\",\n  \"uuid\": \"<string>\",\n  \"name\": \"Aliaksandr\",\n  \"bank_country\": \"LT\",\n  \"bic_swift\": \"AGBLLT2X\",\n  \"account_number\": 123,\n  \"sort_code\": 123,\n  \"street\": \"Gagarina street\",\n  \"house\": 22,\n  \"city\": \"London\",\n  \"country_id\": \"GB\",\n  \"postal_code\": 10001,\n  \"company_name\": \"Finsei Ltd.\",\n  \"first_name\": \"Aliaksandr\",\n  \"last_name\": \"Lastname\"\n}"

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

{
  "errors": [],
  "notice": [],
  "data": {
    "id": 84,
    "uuid": "019ce5b3-6a71-724a-8a44-267480d63534"
  }
}

{
  "name": "Unauthorized",
  "message": "Your request was made with invalid credentials.",
  "status": 401
}

{
  "name": "Forbidden",
  "message": "String",
  "status": 403
}