curl --request PUT \
  --url https://int-api.mx.com/users/{user_guid}/transactions/{transaction_guid} \
  --header 'Accept-Version: <accept-version>' \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "transaction": {
    "category_guid": "CAT-b6d61a19-30a7-e852-2703-bdfb4072289e",
    "date": "2016-10-06",
    "description": "new description",
    "memo": "This is a memo"
  }
}
'

import requests

url = "https://int-api.mx.com/users/{user_guid}/transactions/{transaction_guid}"

payload = { "transaction": {
        "category_guid": "CAT-b6d61a19-30a7-e852-2703-bdfb4072289e",
        "date": "2016-10-06",
        "description": "new description",
        "memo": "This is a memo"
    } }
headers = {
    "Accept-Version": "<accept-version>",
    "Authorization": "Basic <encoded-value>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PUT',
  headers: {
    'Accept-Version': '<accept-version>',
    Authorization: 'Basic <encoded-value>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    transaction: {
      category_guid: 'CAT-b6d61a19-30a7-e852-2703-bdfb4072289e',
      date: '2016-10-06',
      description: 'new description',
      memo: 'This is a memo'
    }
  })
};

fetch('https://int-api.mx.com/users/{user_guid}/transactions/{transaction_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}/transactions/{transaction_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([
    'transaction' => [
        'category_guid' => 'CAT-b6d61a19-30a7-e852-2703-bdfb4072289e',
        'date' => '2016-10-06',
        'description' => 'new description',
        'memo' => 'This is a memo'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Accept-Version: <accept-version>",
    "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}/transactions/{transaction_guid}"

	payload := strings.NewReader("{\n  \"transaction\": {\n    \"category_guid\": \"CAT-b6d61a19-30a7-e852-2703-bdfb4072289e\",\n    \"date\": \"2016-10-06\",\n    \"description\": \"new description\",\n    \"memo\": \"This is a memo\"\n  }\n}")

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

	req.Header.Add("Accept-Version", "<accept-version>")
	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}/transactions/{transaction_guid}")
  .header("Accept-Version", "<accept-version>")
  .header("Authorization", "Basic <encoded-value>")
  .header("Content-Type", "application/json")
  .body("{\n  \"transaction\": {\n    \"category_guid\": \"CAT-b6d61a19-30a7-e852-2703-bdfb4072289e\",\n    \"date\": \"2016-10-06\",\n    \"description\": \"new description\",\n    \"memo\": \"This is a memo\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://int-api.mx.com/users/{user_guid}/transactions/{transaction_guid}")

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

request = Net::HTTP::Put.new(url)
request["Accept-Version"] = '<accept-version>'
request["Authorization"] = 'Basic <encoded-value>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"transaction\": {\n    \"category_guid\": \"CAT-b6d61a19-30a7-e852-2703-bdfb4072289e\",\n    \"date\": \"2016-10-06\",\n    \"description\": \"new description\",\n    \"memo\": \"This is a memo\"\n  }\n}"

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

{
  "transaction": {
    "amount": 61.11,
    "currency_code": "USD",
    "date": "2024-12-20",
    "description": "MX Technologies Payroll",
    "guid": "TRN-429ad9fe-a1d2-4559-8590-885b2603f0e1",
    "id": "1734681600000-178fa8095c154a55b9172f977b4c5f9a-0",
    "self": "/users/USR-11141024-90b3-1bce-cac9-c06ced52ab4c/transactions/TRN-429ad9fe-a1d2-4559-8590-885b2603f0e1",
    "status": "POSTED",
    "type": "CREDIT",
    "account": {
      "account_number_display": "3331261",
      "subtype": "CHECKING",
      "type": "CHECKING",
      "guid": "ACT-06d7f44b-caae-0f6e-1384-01f52e75dcb1",
      "id": "1040434698",
      "name": "Test account 2",
      "nickname": "Swiss Account",
      "self": "/users/USR-11141024-90b3-1bce-cac9-c06ced52ab4c/accounts/ACT-06d7f44b-caae-0f6e-1384-01f52e75dcb1"
    },
    "member": {
      "guid": "MBR-7c6f361b-e582-15b6-60c0-358f12466b4b",
      "id": "unique_id",
      "metadata": "some metadata",
      "name": "MX Bank",
      "self": "/users/USR-11141024-90b3-1bce-cac9-c06ced52ab4c/members/MBR-7c6f361b-e582-15b6-60c0-358f12466b4b"
    },
    "user": {
      "guid": "USR-11141024-90b3-1bce-cac9-c06ced52ab4c",
      "id": "unique_id",
      "metadata": "some metadata",
      "self": "/users/USR-11141024-90b3-1bce-cac9-c06ced52ab4c"
    },
    "mx_record": {
      "created_at": "2025-05-10T18:08:00Z",
      "updated_at": "2026-02-12T22:48:21Z"
    }
  }
}