curl --request POST \
  --url https://api.cakto.com.br/public_api/disputes/{id}/defense/ \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --form files=@example-file \
  --form 'letter=<string>' \
  --form confirmed=true

import requests

url = "https://api.cakto.com.br/public_api/disputes/{id}/defense/"

files = { "files": ("example-file", open("example-file", "rb")) }
payload = {
    "letter": "<string>",
    "confirmed": "true"
}
headers = {"Authorization": "Bearer <token>"}

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

print(response.text)

const form = new FormData();
form.append('files', '<string>');
form.append('letter', '<string>');
form.append('confirmed', 'true');

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

options.body = form;

fetch('https://api.cakto.com.br/public_api/disputes/{id}/defense/', 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.cakto.com.br/public_api/disputes/{id}/defense/",
  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\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"letter\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"confirmed\"\r\n\r\ntrue\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;
}

require 'uri'
require 'net/http'

url = URI("https://api.cakto.com.br/public_api/disputes/{id}/defense/")

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=\"files\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"letter\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"confirmed\"\r\n\r\ntrue\r\n-----011000010111000001101001--"

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

HttpResponse<String> response = Unirest.post("https://api.cakto.com.br/public_api/disputes/{id}/defense/")
  .header("Authorization", "Bearer <token>")
  .body("-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"files\"; filename=\"example-file\"\r\nContent-Type: application/octet-stream\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"letter\"\r\n\r\n<string>\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"confirmed\"\r\n\r\ntrue\r\n-----011000010111000001101001--")
  .asString();

using RestSharp;


var options = new RestClientOptions("https://api.cakto.com.br/public_api/disputes/{id}/defense/");
var client = new RestClient(options);
var request = new RestRequest("");
request.AlwaysMultipartFormData = true;
request.AddHeader("Authorization", "Bearer <token>");
request.FormBoundary = "---011000010111000001101001";
request.AddFile("files", "example-file");
request.AddParameter("letter", "<string>");
request.AddParameter("confirmed", "true");
var response = await client.PostAsync(request);

Console.WriteLine("{0}", response.Content);

{
  "paymentId": "0c9d4e7a-1b2f-4a6e-8d35-7f1e2a9c4b60",
  "kind": "chargeback",
  "status": "submitted",
  "statusLabel": "Em análise pela Cakto",
  "canSubmit": false,
  "canComplement": false,
  "openedAt": "2026-10-19T10:12:40.118302-03:00",
  "deadline": "2026-10-25T23:59:59-03:00",
  "reason": null,
  "amount": "197.00",
  "currency": "BRL",
  "submittedAt": "2026-10-20T09:41:22.873610-03:00",
  "sentAt": null,
  "decidedAt": null,
  "rules": {
    "maxFiles": 10,
    "maxFileSizeBytes": 1900000,
    "acceptedTypes": [
      "application/pdf"
    ],
    "letterMaxLength": 5000,
    "letterMinLength": 300,
    "messageMaxLength": 2000
  },
  "guideUrl": "https://ajuda.cakto.com.br/pt-br/articles/73-chargeback-pre-chargeback-e-med",
  "defense": {
    "status": "submitted",
    "submittedAt": "2026-10-20T09:41:22.873610-03:00",
    "letter": "Prezado banco, a compradora Maria Souza adquiriu o Curso de Exemplo em 02/10/2026 e acessou as aulas em 03/10 e 05/10, como mostra o registro de acesso anexo...",
    "documents": [
      {
        "id": 912,
        "name": "registro-de-acesso.pdf",
        "sizeBytes": 184213,
        "origin": "seller",
        "uploadedAt": "2026-10-20T09:41:22.873610-03:00"
      }
    ],
    "infoRequest": null,
    "declineReason": null,
    "sentAt": null,
    "decidedAt": null,
    "timeline": [
      {
        "at": "2026-10-19T10:12:40.118302-03:00",
        "label": "Chargeback registrado na sua conta",
        "detail": null,
        "state": "done"
      },
      {
        "at": "2026-10-20T09:41:22.873610-03:00",
        "label": "Defesa enviada por você",
        "detail": "1 arquivo",
        "state": "done"
      },
      {
        "at": null,
        "label": "Conferência da Cakto",
        "detail": null,
        "state": "current"
      }
    ]
  },
  "refId": "Q7W2k9P",
  "orderId": "5f2a1c3e-8b7d-4e21-9f10-3c6d7a2b9e41",
  "order": {
    "productName": "Curso de Exemplo",
    "amount": "197.00",
    "formattedAmount": "R$ 197,00",
    "paymentMethod": "credit_card",
    "paymentMethodLabel": "Cartão de Crédito",
    "installments": 1,
    "createdAt": "2026-10-02T14:03:11.204871-03:00",
    "paidAt": "2026-10-02T14:03:15.664021-03:00",
    "customerName": "Maria Souza",
    "customerEmail": "maria.souza@example.com"
  }
}

{
  "detail": "Revise os campos destacados.",
  "errors": {
    "letter": [
      "Escreva a carta com pelo menos 300 caracteres. Ela vai ao banco como está: ..."
    ],
    "files": [
      "contrato.pdf: não é um PDF."
    ]
  }
}

{
  "detail": "As credenciais de autenticação não foram fornecidas."
}

{
  "detail": "Não encontrado."
}

{
  "detail": "A defesa deste pedido já foi enviada."
}

{
  "detail": "O prazo para contestar terminou em 25/10/2026."
}

{
  "detail": "Não foi possível falar com o serviço de pagamentos. Tente de novo em instantes."
}