curl --request POST \
  --url https://api.banking.v2.portao3.com.br/realms/{realmId}/organizations/{organizationId}/accounts/{accountId}/wallets/{walletId}/boleto/{boletoId}/request \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "customFields": "<unknown>"
}
'

import requests

url = "https://api.banking.v2.portao3.com.br/realms/{realmId}/organizations/{organizationId}/accounts/{accountId}/wallets/{walletId}/boleto/{boletoId}/request"

payload = { "customFields": "<unknown>" }
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({customFields: '<unknown>'})
};

fetch('https://api.banking.v2.portao3.com.br/realms/{realmId}/organizations/{organizationId}/accounts/{accountId}/wallets/{walletId}/boleto/{boletoId}/request', 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.banking.v2.portao3.com.br/realms/{realmId}/organizations/{organizationId}/accounts/{accountId}/wallets/{walletId}/boleto/{boletoId}/request",
  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([
    'customFields' => '<unknown>'
  ]),
  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.banking.v2.portao3.com.br/realms/{realmId}/organizations/{organizationId}/accounts/{accountId}/wallets/{walletId}/boleto/{boletoId}/request"

	payload := strings.NewReader("{\n  \"customFields\": \"<unknown>\"\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.banking.v2.portao3.com.br/realms/{realmId}/organizations/{organizationId}/accounts/{accountId}/wallets/{walletId}/boleto/{boletoId}/request")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"customFields\": \"<unknown>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.banking.v2.portao3.com.br/realms/{realmId}/organizations/{organizationId}/accounts/{accountId}/wallets/{walletId}/boleto/{boletoId}/request")

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  \"customFields\": \"<unknown>\"\n}"

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

{
  "_id": "<string>",
  "environment": "LIVE",
  "realmId": "<string>",
  "organizationId": "<string>",
  "accountId": "<string>",
  "walletId": "<string>",
  "barcode": "<string>",
  "status": "REQUESTED",
  "txnCurrency": "784",
  "txnMaxAmount": 123,
  "txnMinAmount": 123,
  "txnOriginalAmount": 123,
  "txnDiscountAmount": 123,
  "txnFineAmount": 123,
  "txnInterestAmount": 123,
  "txnUpdatedAmount": 123,
  "issuer": "<string>",
  "payee": "<string>",
  "payeeDocument": "<string>",
  "payer": "<string>",
  "payerDocument": "<string>",
  "type": "GENERIC",
  "external": {
    "boletoId": "<string>"
  },
  "processingType": "INSTANT",
  "policyRequest": {
    "id": "<string>",
    "realmId": "<string>",
    "organizationId": "<string>",
    "accountId": "<string>",
    "walletId": "<string>",
    "context": "PAYMENT",
    "subjectType": "<string>",
    "subjectId": "<string>",
    "requester": {
      "userId": "<string>",
      "name": "<string>",
      "email": "<string>"
    },
    "body": {},
    "policyId": "<string>",
    "status": "REQUESTED",
    "executionStatus": "WAITING",
    "approvalDeadline": "<string>",
    "approvalHierarchy": true,
    "approvals": [
      {
        "type": "USER",
        "id": "<string>",
        "name": "<string>",
        "status": "WAITING",
        "users": [
          {
            "userId": "<string>",
            "userName": "<string>",
            "userEmail": "<string>",
            "status": "WAITING"
          }
        ],
        "createdAt": "<string>",
        "requestedAt": "<string>",
        "decisionAt": "<string>",
        "decisionReason": "<string>"
      }
    ],
    "walletName": "<string>",
    "denialReason": "<string>",
    "resolution": "AUTO",
    "executionMode": "MOVE_BALANCE_ONLY",
    "executionFailReason": "<string>",
    "executionMoveBalance": {
      "addBalance": true,
      "fromAccountId": "<string>",
      "fromWalletId": "<string>"
    },
    "createdAt": "<string>",
    "updatedAt": "<string>"
  },
  "receipt": {
    "authentication": "<string>",
    "authenticationApi": "<string>",
    "receipt": "<string>"
  },
  "confirmedAt": "<string>",
  "confirmedAmount": 123,
  "confirmedBalanceCategory": "FLEX_NATIONAL",
  "dueDate": "<string>",
  "expiresAt": "<string>",
  "canceledAt": "<string>",
  "settlesAt": "<string>",
  "refundedAt": "<string>",
  "scheduledAt": "<string>",
  "scheduledTimeZone": "<string>",
  "scheduleId": "<string>",
  "policyRequestId": "<string>",
  "autoResolutionRequestedAt": "<string>",
  "autoResolutionInFlightUntil": "<string>",
  "approvalExpiresAt": "<string>",
  "pendingConfirmation": {
    "amount": 123,
    "category": "FLEX_NATIONAL",
    "description": "<string>"
  },
  "requester": {
    "userId": "<string>",
    "name": "<string>",
    "email": "<string>"
  },
  "customFields": {},
  "createdAt": "<string>",
  "updatedAt": "<string>"
}