POST /logistica/rastreamento/notafiscal/{numero}/{serie}

curl    

curl -X POST "https://bling.com.br/Api/v2/logistica/rastreamento/notafiscal/{número}/{série}/json/"
     -G
     -d "apikey={apikey}"
     -d "xml={xml_rastreamentos}"

PHP

$url = 'https://bling.com.br/Api/v2/logistica/rastreamento/notafiscal/12/1/json';
$xml = '...';
$data = array(
   'apikey' => '{apikey}',
   'xml' => rawurlencode($xml)
);
$retorno = executeGetOrder($url, $data);
echo $retorno;
function executeSendTracking($url, $data){
    $curl_handle = curl_init();
    curl_setopt($curl_handle, CURLOPT_URL, $url);
    curl_setopt($curl_handle, CURLOPT_POST, count($data));
    curl_setopt($curl_handle, CURLOPT_POSTFIELDS, $data);
    curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, TRUE);
    $response = curl_exec($curl_handle);
    curl_close($curl_handle);
    return $response;
}

C#

public static void ExecuteSendTracking() {
   HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://bling.com.br/Api/v2/rastreamento/notafiscal/12/1/json");
   ASCIIEncoding encoding = new ASCIIEncoding();
   string postData = "apikey={apiKey}&xml={xml_rastreamentos}";
   byte[] data = encoding.GetBytes(postData);
   request.Method = "POST";
   request.ContentType = "application/x-www-form-urlencoded";
   request.ContentLength = data.Length;
   using (Stream stream = request.GetRequestStream())
       stream.Write(data,0,data.Length);
   HttpWebResponse response = (HttpWebResponse)request.GetResponse();
   string responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();
   Console.Out.WriteLine("Response Body: \r\n {0}", responseString);
}