Get and accept "trade offers "(Steam Web API)

This API does not provide the ability to accept an incoming exchange offer.

With it, you can only get a list of offers, cancel your own, or reject incoming ones. At the same time, it only works for the account that you have registered the API for naturally.

Example of a request to get a list of offers:

http://api.steampowered.com/IEconService/GetTradeOffers/v1/?key=********&get_sent_offers=1&time_historical_cutoff=100

You substitute the parameters you need, which are described in the manual, and the api key in the place of the asterisks

$url = 'https://steamcommunity.com/tradeoffer/' . $tradeID . '/accept';
$partnerID = '';
$tradeID = '';
 $data = array(
        'sessionid' => $sessionId,
        'serverid' => '1',
        'partner' => $partnerID,
        'tradeofferid' => tradeID,
        'captcha' => ''
    );
    $c = curl_init();
    curl_setopt($c, CURLOPT_HEADER, false);
    curl_setopt($c, CURLOPT_NOBODY, false);
    curl_setopt($c, CURLOPT_URL, $url);
    curl_setopt($c, CURLOPT_SSL_VERIFYHOST, 0);
    curl_setopt($c, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.0.3705; .NET CLR 1.1.4322)");
    curl_setopt($c, CURLOPT_COOKIE, $cookies);
    curl_setopt($c, CURLOPT_POST, 1);
    curl_setopt($c, CURLOPT_POSTFIELDS, http_build_query($data));
    curl_setopt($c, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($c, CURLOPT_HTTPHEADER, array('Referer: https://steamcommunity.com/tradeoffer/' . $tradeID));
    curl_setopt($c, CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($c, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($c, CURLOPT_CUSTOMREQUEST, strtoupper('POST'));
    $response = curl_exec($c);
    curl_close($c);
    echo $response;

$TradeID can be found by sending a Get request to http://api.steampowered.com/IEconService/GetTradeOffers/v1/?key=[API_KEY]&get_received_offers=1&time_historical_cutoff=100 ; We take $SessionID and $cookies from authorization.

This API allows you to get trade offers, as well as their IDs. So you can accept them with a simple Post request to https://steamcommunity.com/tradeoffer/"tradeId"/accept where tradeId is actually the offer ID.

In the header of the submission, you need to specify:

{"sessionid", ...},
{"serverid", ...},
{"tradeofferid", ...},
{"partner", ...},
{"captcha", ...}

The first two parameters must be stored in a container that is collected during authorization. The third and fourth parameters will be obtained via the API you suggested, and the captcha, by default, is string.empty