curl -H "MicroworkersApiKey:YOUR_API_KEY" -X PUT https://api.microworkers.com/campaign_hg/submit_proof/<campaign_id> -d "proof[]=<proof>&proof[]=<another_proof>&ip=<ip>&user_id=<user_id>&random_key=<random_key>"

<?php

include "includes/RESTClient.php";
define("cAPI_KEY", "YOUR_API_KEY");
define("cAPI_URL", "https://api.microworkers.com");
$client = new RESTClient();
$client->setApiKey(cAPI_KEY);
$client->setUrl(cAPI_URL . "/campaign_hg/submit_proof/e7162dd17b83");
$client->setMethod("PUT");

$client->setData(
  array('proof[]' => 'task complete', 'ip' => '217.77.222.221', 'user_id' => '123456', 'random_key' => '4567890')
);

$client->execute();
$response = $client->getLastResponse();
$client->resetClient();
echo $response;

?>

use MW_API;
use Data::Dumper qw(Dumper);
my $mw_api = MW_API->new('api_key' => 'YOUR_API_KEY');
my $res = $mw_api->do_request('PUT', '/campaign_hg/submit_proof/e7162dd17b83', {'proof[]' => 'task complete', 'ip' => '217.77.222.221', 'user_id' => '123456', 'random_key' => '4567890'});
print Dumper($res);

from pprint import pprint
from MW_API import MW_API
mw_api = MW_API('YOUR_API_KEY')
res = mw_api.do_request('PUT', '/campaign_hg/submit_proof/e7162dd17b83', {'proof': 'task complete', 'ip': '217.77.222.221', 'user_id': '123456', 'random_key': '4567890'})
pprint(res)

using System;
using MWAPI;
using System.Collections.Specialized;

public class Test
{
  public static void Main (string[] args)
  {
    MW_API MW_API_Client = new MW_API ("YOUR_API_KEY");
    NameValueCollection postData = new NameValueCollection();
    postData.Add("proof[]", "task complete");
    postData.Add("ip", "217.77.222.221");
    postData.Add("user_id", "123456");
    postData.Add("random_key", "4567890");
    string body = MW_API_Client.putRequest("/campaign_hg/submit_proof/e7162dd17b83", postData);
    Console.WriteLine (body);
  }
}