curl --request PUT \
  --url https://int-api.mx.com/users/{user_guid}/managed_members/{member_guid}/accounts/{account_guid} \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "account": {
    "account_number": "5366",
    "apr": 1,
    "apy": 1,
    "available_balance": 1000,
    "available_credit": 1000,
    "balance": 1000,
    "cash_surrender_value": 1000,
    "credit_limit": 100,
    "currency_code": "USD",
    "day_payment_is_due": 20,
    "death_benefit": 1000,
    "id": "1040434698",
    "interest_rate": 1,
    "is_closed": false,
    "is_hidden": false,
    "last_payment": 100,
    "last_payment_at": "2015-10-13T17:57:37.000Z",
    "loan_amount": 1000,
    "matures_on": "2015-10-13T17:57:37.000Z",
    "metadata": "some metadata",
    "minimum_balance": 100,
    "minimum_payment": 10,
    "name": "Test account 2",
    "nickname": "Swiss Account",
    "original_balance": 10,
    "payment_due_at": "2015-10-13T17:57:37.000Z",
    "payoff_balance": 10,
    "routing_number": "68899990000000",
    "started_on": "2015-10-13T17:57:37.000Z",
    "subtype": "NONE",
    "type": "SAVINGS"
  }
}
'

import requests

url = "https://int-api.mx.com/users/{user_guid}/managed_members/{member_guid}/accounts/{account_guid}"

payload = { "account": {
        "account_number": "5366",
        "apr": 1,
        "apy": 1,
        "available_balance": 1000,
        "available_credit": 1000,
        "balance": 1000,
        "cash_surrender_value": 1000,
        "credit_limit": 100,
        "currency_code": "USD",
        "day_payment_is_due": 20,
        "death_benefit": 1000,
        "id": "1040434698",
        "interest_rate": 1,
        "is_closed": False,
        "is_hidden": False,
        "last_payment": 100,
        "last_payment_at": "2015-10-13T17:57:37.000Z",
        "loan_amount": 1000,
        "matures_on": "2015-10-13T17:57:37.000Z",
        "metadata": "some metadata",
        "minimum_balance": 100,
        "minimum_payment": 10,
        "name": "Test account 2",
        "nickname": "Swiss Account",
        "original_balance": 10,
        "payment_due_at": "2015-10-13T17:57:37.000Z",
        "payoff_balance": 10,
        "routing_number": "68899990000000",
        "started_on": "2015-10-13T17:57:37.000Z",
        "subtype": "NONE",
        "type": "SAVINGS"
    } }
headers = {
    "Authorization": "Basic <encoded-value>",
    "Content-Type": "application/json"
}

response = requests.put(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'PUT',
  headers: {Authorization: 'Basic <encoded-value>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    account: {
      account_number: '5366',
      apr: 1,
      apy: 1,
      available_balance: 1000,
      available_credit: 1000,
      balance: 1000,
      cash_surrender_value: 1000,
      credit_limit: 100,
      currency_code: 'USD',
      day_payment_is_due: 20,
      death_benefit: 1000,
      id: '1040434698',
      interest_rate: 1,
      is_closed: false,
      is_hidden: false,
      last_payment: 100,
      last_payment_at: '2015-10-13T17:57:37.000Z',
      loan_amount: 1000,
      matures_on: '2015-10-13T17:57:37.000Z',
      metadata: 'some metadata',
      minimum_balance: 100,
      minimum_payment: 10,
      name: 'Test account 2',
      nickname: 'Swiss Account',
      original_balance: 10,
      payment_due_at: '2015-10-13T17:57:37.000Z',
      payoff_balance: 10,
      routing_number: '68899990000000',
      started_on: '2015-10-13T17:57:37.000Z',
      subtype: 'NONE',
      type: 'SAVINGS'
    }
  })
};

fetch('https://int-api.mx.com/users/{user_guid}/managed_members/{member_guid}/accounts/{account_guid}', 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://int-api.mx.com/users/{user_guid}/managed_members/{member_guid}/accounts/{account_guid}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PUT",
  CURLOPT_POSTFIELDS => json_encode([
    'account' => [
        'account_number' => '5366',
        'apr' => 1,
        'apy' => 1,
        'available_balance' => 1000,
        'available_credit' => 1000,
        'balance' => 1000,
        'cash_surrender_value' => 1000,
        'credit_limit' => 100,
        'currency_code' => 'USD',
        'day_payment_is_due' => 20,
        'death_benefit' => 1000,
        'id' => '1040434698',
        'interest_rate' => 1,
        'is_closed' => false,
        'is_hidden' => false,
        'last_payment' => 100,
        'last_payment_at' => '2015-10-13T17:57:37.000Z',
        'loan_amount' => 1000,
        'matures_on' => '2015-10-13T17:57:37.000Z',
        'metadata' => 'some metadata',
        'minimum_balance' => 100,
        'minimum_payment' => 10,
        'name' => 'Test account 2',
        'nickname' => 'Swiss Account',
        'original_balance' => 10,
        'payment_due_at' => '2015-10-13T17:57:37.000Z',
        'payoff_balance' => 10,
        'routing_number' => '68899990000000',
        'started_on' => '2015-10-13T17:57:37.000Z',
        'subtype' => 'NONE',
        'type' => 'SAVINGS'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Basic <encoded-value>",
    "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://int-api.mx.com/users/{user_guid}/managed_members/{member_guid}/accounts/{account_guid}"

	payload := strings.NewReader("{\n  \"account\": {\n    \"account_number\": \"5366\",\n    \"apr\": 1,\n    \"apy\": 1,\n    \"available_balance\": 1000,\n    \"available_credit\": 1000,\n    \"balance\": 1000,\n    \"cash_surrender_value\": 1000,\n    \"credit_limit\": 100,\n    \"currency_code\": \"USD\",\n    \"day_payment_is_due\": 20,\n    \"death_benefit\": 1000,\n    \"id\": \"1040434698\",\n    \"interest_rate\": 1,\n    \"is_closed\": false,\n    \"is_hidden\": false,\n    \"last_payment\": 100,\n    \"last_payment_at\": \"2015-10-13T17:57:37.000Z\",\n    \"loan_amount\": 1000,\n    \"matures_on\": \"2015-10-13T17:57:37.000Z\",\n    \"metadata\": \"some metadata\",\n    \"minimum_balance\": 100,\n    \"minimum_payment\": 10,\n    \"name\": \"Test account 2\",\n    \"nickname\": \"Swiss Account\",\n    \"original_balance\": 10,\n    \"payment_due_at\": \"2015-10-13T17:57:37.000Z\",\n    \"payoff_balance\": 10,\n    \"routing_number\": \"68899990000000\",\n    \"started_on\": \"2015-10-13T17:57:37.000Z\",\n    \"subtype\": \"NONE\",\n    \"type\": \"SAVINGS\"\n  }\n}")

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

	req.Header.Add("Authorization", "Basic <encoded-value>")
	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.put("https://int-api.mx.com/users/{user_guid}/managed_members/{member_guid}/accounts/{account_guid}")
  .header("Authorization", "Basic <encoded-value>")
  .header("Content-Type", "application/json")
  .body("{\n  \"account\": {\n    \"account_number\": \"5366\",\n    \"apr\": 1,\n    \"apy\": 1,\n    \"available_balance\": 1000,\n    \"available_credit\": 1000,\n    \"balance\": 1000,\n    \"cash_surrender_value\": 1000,\n    \"credit_limit\": 100,\n    \"currency_code\": \"USD\",\n    \"day_payment_is_due\": 20,\n    \"death_benefit\": 1000,\n    \"id\": \"1040434698\",\n    \"interest_rate\": 1,\n    \"is_closed\": false,\n    \"is_hidden\": false,\n    \"last_payment\": 100,\n    \"last_payment_at\": \"2015-10-13T17:57:37.000Z\",\n    \"loan_amount\": 1000,\n    \"matures_on\": \"2015-10-13T17:57:37.000Z\",\n    \"metadata\": \"some metadata\",\n    \"minimum_balance\": 100,\n    \"minimum_payment\": 10,\n    \"name\": \"Test account 2\",\n    \"nickname\": \"Swiss Account\",\n    \"original_balance\": 10,\n    \"payment_due_at\": \"2015-10-13T17:57:37.000Z\",\n    \"payoff_balance\": 10,\n    \"routing_number\": \"68899990000000\",\n    \"started_on\": \"2015-10-13T17:57:37.000Z\",\n    \"subtype\": \"NONE\",\n    \"type\": \"SAVINGS\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://int-api.mx.com/users/{user_guid}/managed_members/{member_guid}/accounts/{account_guid}")

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

request = Net::HTTP::Put.new(url)
request["Authorization"] = 'Basic <encoded-value>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"account\": {\n    \"account_number\": \"5366\",\n    \"apr\": 1,\n    \"apy\": 1,\n    \"available_balance\": 1000,\n    \"available_credit\": 1000,\n    \"balance\": 1000,\n    \"cash_surrender_value\": 1000,\n    \"credit_limit\": 100,\n    \"currency_code\": \"USD\",\n    \"day_payment_is_due\": 20,\n    \"death_benefit\": 1000,\n    \"id\": \"1040434698\",\n    \"interest_rate\": 1,\n    \"is_closed\": false,\n    \"is_hidden\": false,\n    \"last_payment\": 100,\n    \"last_payment_at\": \"2015-10-13T17:57:37.000Z\",\n    \"loan_amount\": 1000,\n    \"matures_on\": \"2015-10-13T17:57:37.000Z\",\n    \"metadata\": \"some metadata\",\n    \"minimum_balance\": 100,\n    \"minimum_payment\": 10,\n    \"name\": \"Test account 2\",\n    \"nickname\": \"Swiss Account\",\n    \"original_balance\": 10,\n    \"payment_due_at\": \"2015-10-13T17:57:37.000Z\",\n    \"payoff_balance\": 10,\n    \"routing_number\": \"68899990000000\",\n    \"started_on\": \"2015-10-13T17:57:37.000Z\",\n    \"subtype\": \"NONE\",\n    \"type\": \"SAVINGS\"\n  }\n}"

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

{
  "account": {
    "account_number": "5366",
    "account_number_set_by": 1,
    "account_ownership": "INDIVIDUAL",
    "annuity_policy_to_date": "2016-10-13T17:57:37.000Z",
    "annuity_provider": "Metlife",
    "annuity_term_year": 2048,
    "apr": 1,
    "apr_set_by": 1,
    "apy": 1,
    "apy_set_by": 1,
    "available_balance": 1000,
    "available_balance_set_by": 1,
    "available_credit": 1000,
    "available_credit_set_by": 1,
    "balance": 10000,
    "balance_set_by": 1,
    "calculated_apr": 21.66409,
    "cash_balance": 1000,
    "cash_balance_set_by": 1,
    "cash_surrender_value": 1000,
    "cash_surrender_value_set_by": 1,
    "created_at": "2023-07-25T17:14:46Z",
    "credit_limit": 100,
    "credit_limit_set_by": 1,
    "currency_code": "USD",
    "currency_code_set_by": 1,
    "day_payment_is_due": 20,
    "day_payment_is_due_set_by": 1,
    "death_benefit": 1000,
    "death_benefit_set_by": 1,
    "federal_insurance_status": "INSURED",
    "feed_account_number": "5366",
    "feed_account_subtype": 1,
    "feed_account_type": 1,
    "feed_apr": 1,
    "feed_apy": 1,
    "feed_available_balance": 1000,
    "feed_balance": 1000,
    "feed_cash_balance": 1000,
    "feed_cash_surrender_value": 1000,
    "feed_credit_limit": 100,
    "feed_currency_code": "USD",
    "feed_day_payment_is_due": 20,
    "feed_death_benefit": 1000,
    "feed_holdings_value": 1000,
    "feed_interest_rate": 1,
    "feed_is_closed": false,
    "feed_last_payment": 100,
    "feed_last_payment_at": "2023-07-25T17:14:46Z",
    "feed_loan_amount": 1000,
    "feed_matures_on": "2015-10-13T17:57:37.000Z",
    "feed_minimum_balance": 100,
    "feed_minimum_payment": 10,
    "feed_name": "Test account 2",
    "feed_nickname": "My Checking",
    "feed_original_balance": 10,
    "feed_payment_due_at": "2025-02-13T17:57:37.000Z",
    "feed_payoff_balance": 10,
    "feed_routing_number": "68899990000000",
    "feed_started_on": "2020-10-13T17:57:37.000Z",
    "feed_statement_balance": 100,
    "feed_total_account_value": 100,
    "guid": "ACT-06d7f44b-caae-0f6e-1384-01f52e75dcb1",
    "holdings_value": 1000,
    "holdings_value_set_by": 1,
    "id": "1040434698",
    "imported_at": "2015-10-13T17:57:37.000Z",
    "institution_code": "3af3685e-05d9-7060-359f-008d0755e993",
    "institution_guid": "INS-12a3b-4c5dd6-1349-008d0755e993",
    "insured_name": "Tommy Shelby",
    "interest_rate": 1,
    "interest_rate_set_by": 1,
    "is_closed": false,
    "is_closed_set_by": 1,
    "is_hidden": false,
    "is_manual": false,
    "last_payment": 100,
    "last_payment_set_by": 1,
    "last_payment_at": "2023-07-25T17:14:46Z",
    "last_payment_at_set_by": 1,
    "loan_amount": 1000,
    "loan_amount_set_by": 1,
    "margin_balance": 1000,
    "matures_on": "2015-10-13T17:57:37.000Z",
    "matures_on_set_by": 1,
    "member_guid": "MBR-7c6f361b-e582-15b6-60c0-358f12466b4b",
    "member_id": "member123",
    "member_is_managed_by_user": false,
    "metadata": "some metadata",
    "minimum_balance": 100,
    "minimum_balance_set_by": 1,
    "minimum_payment": 10,
    "minimum_payment_set_by": 1,
    "name": "Test account 2",
    "name_set_by": 1,
    "nickname": "My Checking",
    "nickname_set_by": 1,
    "original_balance": 10,
    "original_balance_set_by": 1,
    "pay_out_amount": 10,
    "payment_due_at": "2015-10-13T17:57:37.000Z",
    "payment_due_at_set_by": 1,
    "payoff_balance": 10,
    "payoff_balance_set_by": 1,
    "premium_amount": 3900,
    "property_type": "VEHICLE",
    "routing_number": "68899990000000",
    "started_on": "2015-10-13T17:57:37.000Z",
    "started_on_set_by": 1,
    "statement_balance": 1000.5,
    "statement_balance_set_by": 1,
    "subtype": "NONE",
    "subtype_set_by": 1,
    "today_ugl_amount": 1000.5,
    "today_ugl_percentage": 6.9,
    "total_account_value": 1,
    "total_account_value_set_by": 1,
    "total_account_value_ugl": 1,
    "type": "SAVINGS",
    "type_set_by": 1,
    "updated_at": "2016-10-13T18:08:00.000Z",
    "user_guid": "USR-fa7537f3-48aa-a683-a02a-b18940482f54",
    "user_id": "user123"
  }
}