curl --request POST \
  --url https://api.dualentry.com/public/v2/vendor-payments/{record_number}/attachments/ \
  --header 'Content-Type: multipart/form-data' \
  --header 'X-API-KEY: <api-key>' \
  --form 'files=<string>' \
  --form files.items='@example-file'

import requests

url = "https://api.dualentry.com/public/v2/vendor-payments/{record_number}/attachments/"

files = { "files.items": ("example-file", open("example-file", "rb")) }
payload = { "files": "<string>" }
headers = {"X-API-KEY": "<api-key>"}

response = requests.post(url, data=payload, files=files, headers=headers)

print(response.text)

const form = new FormData();
form.append('files', '<string>');
form.append('files.items', '{
  "fileName": "example-file"
}');

const options = {method: 'POST', headers: {'X-API-KEY': '<api-key>'}};

options.body = form;

fetch('https://api.dualentry.com/public/v2/vendor-payments/{record_number}/attachments/', 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.dualentry.com/public/v2/vendor-payments/{record_number}/attachments/",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"files\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"files.items\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n{\r\n  \"fileName\": \"example-file\"\r\n}\r\n-----011000010111000001101001--",
  CURLOPT_HTTPHEADER => [
    "Content-Type: multipart/form-data",
    "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.dualentry.com/public/v2/vendor-payments/{record_number}/attachments/"

	payload := strings.NewReader("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"files\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"files.items\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n{\r\n  \"fileName\": \"example-file\"\r\n}\r\n-----011000010111000001101001--")

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

	req.Header.Add("X-API-KEY", "<api-key>")

	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.dualentry.com/public/v2/vendor-payments/{record_number}/attachments/")
  .header("X-API-KEY", "<api-key>")
  .body("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"files\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"files.items\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n{\r\n  \"fileName\": \"example-file\"\r\n}\r\n-----011000010111000001101001--")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.dualentry.com/public/v2/vendor-payments/{record_number}/attachments/")

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.body = "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"files\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"files.items\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n{\r\n  \"fileName\": \"example-file\"\r\n}\r\n-----011000010111000001101001--"

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

{
  "transaction_ids": [
    123
  ],
  "internal_id": 123,
  "number": 123,
  "account_number": 123,
  "items": [
    {
      "amount": "<string>",
      "position": 123,
      "bank_or_credit_card_amount": "<string>",
      "bill_number": 123,
      "vendor_credit_number": 123,
      "journal_entry_line_id": 123,
      "intercompany_journal_entry_line_id": 123
    }
  ],
  "company_id": 123,
  "company_name": "<string>",
  "company_currency": "<string>",
  "memo": "<string>",
  "check_number": "<string>",
  "date": "2023-12-25",
  "transaction_date": "2023-12-25",
  "currency_iso_4217_code": "AED",
  "exchange_rate": "<string>",
  "bank_or_credit_card_amount": "<string>",
  "amount": "<string>",
  "record_status": "draft",
  "paper_check_status": "printed",
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "custom_fields": [],
  "integration_remote_records": [],
  "attachments": [],
  "classifications": [],
  "created_by": {
    "actor_type": "<string>",
    "email": "<string>",
    "first_name": "<string>",
    "last_name": "<string>",
    "timestamp": "2023-11-07T05:31:56Z"
  },
  "updated_by": {
    "actor_type": "<string>",
    "email": "<string>",
    "first_name": "<string>",
    "last_name": "<string>",
    "timestamp": "2023-11-07T05:31:56Z"
  },
  "code": "<string>",
  "vendor_id": 123,
  "vendor_name": "<string>",
  "payment_method_id": 123,
  "source": "manual"
}

{
  "errors": {},
  "success": false,
  "error_code": "<string>",
  "error_reason": "<string>"
}

{
  "errors": {},
  "success": false,
  "error_code": "<string>",
  "error_reason": "<string>"
}

{
  "errors": {},
  "success": false,
  "error_code": "<string>",
  "error_reason": "<string>"
}