curl --request POST \
  --url https://openapi.pluuug.com/v1/settlement \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --header 'X-Signature: <api-key>' \
  --data '
{
  "title": "<string>",
  "amount": 1,
  "additionalAmount": 1,
  "vat": 1,
  "contract": {
    "id": 123
  },
  "type": {
    "id": 123
  },
  "settlementRound": 2,
  "dueDate": "2023-12-25",
  "settledDate": "2023-12-25",
  "isTaxInvoiceIssued": false,
  "isTaxInvoiceNeeded": false,
  "taxInvoiceIssuedDate": "2023-12-25",
  "taxInvoiceIssueDueDate": "2023-12-25",
  "inChargeSet": [
    {
      "id": 123
    }
  ]
}
'

import requests

url = "https://openapi.pluuug.com/v1/settlement"

payload = {
    "title": "<string>",
    "amount": 1,
    "additionalAmount": 1,
    "vat": 1,
    "contract": { "id": 123 },
    "type": { "id": 123 },
    "settlementRound": 2,
    "dueDate": "2023-12-25",
    "settledDate": "2023-12-25",
    "isTaxInvoiceIssued": False,
    "isTaxInvoiceNeeded": False,
    "taxInvoiceIssuedDate": "2023-12-25",
    "taxInvoiceIssueDueDate": "2023-12-25",
    "inChargeSet": [{ "id": 123 }]
}
headers = {
    "X-API-Key": "<api-key>",
    "X-Signature": "<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>',
    'X-Signature': '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    title: '<string>',
    amount: 1,
    additionalAmount: 1,
    vat: 1,
    contract: {id: 123},
    type: {id: 123},
    settlementRound: 2,
    dueDate: '2023-12-25',
    settledDate: '2023-12-25',
    isTaxInvoiceIssued: false,
    isTaxInvoiceNeeded: false,
    taxInvoiceIssuedDate: '2023-12-25',
    taxInvoiceIssueDueDate: '2023-12-25',
    inChargeSet: [{id: 123}]
  })
};

fetch('https://openapi.pluuug.com/v1/settlement', 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://openapi.pluuug.com/v1/settlement",
  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([
    'title' => '<string>',
    'amount' => 1,
    'additionalAmount' => 1,
    'vat' => 1,
    'contract' => [
        'id' => 123
    ],
    'type' => [
        'id' => 123
    ],
    'settlementRound' => 2,
    'dueDate' => '2023-12-25',
    'settledDate' => '2023-12-25',
    'isTaxInvoiceIssued' => false,
    'isTaxInvoiceNeeded' => false,
    'taxInvoiceIssuedDate' => '2023-12-25',
    'taxInvoiceIssueDueDate' => '2023-12-25',
    'inChargeSet' => [
        [
                'id' => 123
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-API-Key: <api-key>",
    "X-Signature: <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://openapi.pluuug.com/v1/settlement"

	payload := strings.NewReader("{\n  \"title\": \"<string>\",\n  \"amount\": 1,\n  \"additionalAmount\": 1,\n  \"vat\": 1,\n  \"contract\": {\n    \"id\": 123\n  },\n  \"type\": {\n    \"id\": 123\n  },\n  \"settlementRound\": 2,\n  \"dueDate\": \"2023-12-25\",\n  \"settledDate\": \"2023-12-25\",\n  \"isTaxInvoiceIssued\": false,\n  \"isTaxInvoiceNeeded\": false,\n  \"taxInvoiceIssuedDate\": \"2023-12-25\",\n  \"taxInvoiceIssueDueDate\": \"2023-12-25\",\n  \"inChargeSet\": [\n    {\n      \"id\": 123\n    }\n  ]\n}")

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

	req.Header.Add("X-API-Key", "<api-key>")
	req.Header.Add("X-Signature", "<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://openapi.pluuug.com/v1/settlement")
  .header("X-API-Key", "<api-key>")
  .header("X-Signature", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"title\": \"<string>\",\n  \"amount\": 1,\n  \"additionalAmount\": 1,\n  \"vat\": 1,\n  \"contract\": {\n    \"id\": 123\n  },\n  \"type\": {\n    \"id\": 123\n  },\n  \"settlementRound\": 2,\n  \"dueDate\": \"2023-12-25\",\n  \"settledDate\": \"2023-12-25\",\n  \"isTaxInvoiceIssued\": false,\n  \"isTaxInvoiceNeeded\": false,\n  \"taxInvoiceIssuedDate\": \"2023-12-25\",\n  \"taxInvoiceIssueDueDate\": \"2023-12-25\",\n  \"inChargeSet\": [\n    {\n      \"id\": 123\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://openapi.pluuug.com/v1/settlement")

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["X-Signature"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"title\": \"<string>\",\n  \"amount\": 1,\n  \"additionalAmount\": 1,\n  \"vat\": 1,\n  \"contract\": {\n    \"id\": 123\n  },\n  \"type\": {\n    \"id\": 123\n  },\n  \"settlementRound\": 2,\n  \"dueDate\": \"2023-12-25\",\n  \"settledDate\": \"2023-12-25\",\n  \"isTaxInvoiceIssued\": false,\n  \"isTaxInvoiceNeeded\": false,\n  \"taxInvoiceIssuedDate\": \"2023-12-25\",\n  \"taxInvoiceIssueDueDate\": \"2023-12-25\",\n  \"inChargeSet\": [\n    {\n      \"id\": 123\n    }\n  ]\n}"

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

{
  "id": 123,
  "title": "<string>",
  "amount": 1,
  "additionalAmount": 1,
  "vat": 1,
  "typeAlias": "<string>",
  "created": "2023-11-07T05:31:56Z",
  "contract": {
    "id": 123,
    "title": "<string>",
    "amount": 123,
    "startDate": "2023-12-25",
    "endDate": "2023-12-25"
  },
  "dueDate": "2023-12-25",
  "settledDate": "2023-12-25"
}

{
  "nonField": [
    "<string>"
  ],
  "title": [
    "<string>"
  ],
  "amount": [
    "<string>"
  ],
  "additionalAmount": [
    "<string>"
  ],
  "vat": [
    "<string>"
  ],
  "settlementRound": [
    "<string>"
  ],
  "dueDate": [
    "<string>"
  ],
  "settledDate": [
    "<string>"
  ],
  "isTaxInvoiceIssued": [
    "<string>"
  ],
  "isTaxInvoiceNeeded": [
    "<string>"
  ],
  "taxInvoiceIssuedDate": [
    "<string>"
  ],
  "taxInvoiceIssueDueDate": [
    "<string>"
  ],
  "contract": {
    "id": [
      "<string>"
    ]
  },
  "type": {
    "id": [
      "<string>"
    ]
  },
  "inChargeSet": [
    "<string>"
  ]
}