curl --request POST \
  --url https://api-sandbox.finogates.com/v1/platform/payments/document-mailing \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --form 'payload=<string>' \
  --form document='@example-file' \
  --form attachments.items='@example-file'

import requests

url = "https://api-sandbox.finogates.com/v1/platform/payments/document-mailing"

files = {
    "document": ("example-file", open("example-file", "rb")),
    "attachments.items": ("example-file", open("example-file", "rb"))
}
payload = { "payload": "<string>" }
headers = {"Authorization": "Bearer <token>"}

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

print(response.text)

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

const options = {method: 'POST', headers: {Authorization: 'Bearer <token>'}};

options.body = form;

fetch('https://api-sandbox.finogates.com/v1/platform/payments/document-mailing', 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.finogates.com/v1/platform/payments/document-mailing",
  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=\"payload\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"document\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"attachments.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 => [
    "Authorization: Bearer <token>",
    "Content-Type: multipart/form-data"
  ],
]);

$response = curl_exec($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.finogates.com/v1/platform/payments/document-mailing"

	payload := strings.NewReader("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"payload\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"document\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"attachments.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("Authorization", "Bearer <token>")

	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.finogates.com/v1/platform/payments/document-mailing")
  .header("Authorization", "Bearer <token>")
  .body("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"payload\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"document\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"attachments.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-sandbox.finogates.com/v1/platform/payments/document-mailing")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request.body = "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"payload\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"document\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"attachments.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

{
  "status_code": 201,
  "data": {
    "document_shipping_id": "9b1e6c2a-4f3d-4a8b-9c7e-2d5f1a6b3c4d",
    "payment_id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
    "status": "pending",
    "mail_type": "usps_ground_advantage",
    "amount": 0,
    "fee_amount": 12.35,
    "total_amount": 12.35,
    "currency": "USD",
    "recipient": {
      "name": "Dana Reed",
      "phone": "+13035550188",
      "line_1": "456 Oak Ave",
      "line_2": "Suite 200",
      "city": "Denver",
      "state": "CO",
      "zip": "80202",
      "country": "US"
    },
    "description": "Q3 invoice packet",
    "invoice_number": "INV-10432",
    "intent_status": "pending_review",
    "created_at": "2026-08-24T14:30:00Z",
    "updated_at": "2026-08-24T14:30:00Z",
    "attachments": [
      {
        "id": "7c4d2e1a-8b3f-4d6c-9a1e-5f2b3c4d5e6f",
        "file_name": "remittance_advice.pdf",
        "page_count": 2,
        "byte_size": 184320,
        "ordinal": 0
      }
    ],
    "attachment_page_count": 2,
    "attachment_fee": 0.5,
    "document_page_count": 10,
    "document_fee": 4.9,
    "shipping_fee": 6.95,
    "carrier_cost": 5.2,
    "markup": 1.75
  },
  "query_generated_time": 1712847600000
}

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>"
    }
  ]
}