$data = array(
        'software_info'  => array(
          'version'   => '3.1.10.0'
        ),
        'external_software' =>  array(
          'product'   =>  'QuickBooks Pro 2016'
        ),
        'desktop_info'  =>  array(
          'osversion'   =>  'Microsoft Windows NT 6.1.7601 Service Pack 1'
        )
      );

      $data_string = json_encode($data);

      $ch = curl_init('https://demo.goodfundsgateway.com/api/connection.json/software');
      curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
      curl_setopt($ch, CURLOPT_SSLVERSION, 6);
      curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
      curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
      curl_setopt($ch, CURLOPT_HTTPHEADER, array(
          'Content-Type: application/json',
          'Content-Length: ' . strlen($data_string),
          'svs-api-id: [SVS API ID]',
          'svs-api-key: [SVS API KEY]')
      );                       
                                                                                                                           
      $result = curl_exec($ch);
      $err = curl_error($ch);

      curl_close($ch);

      if ($err) {
        echo "cURL Error #:" . $err;
      } else {
        echo $result;
      }
    

      {
        "status":"success",
        "successMessage":
        {
          "response_code":203,
          "message":
            {
              "account":
              {
                "CreditCardGateway":
                {
                  "gateway_id":"[Gateway ID]",
                  "alias":"Converge Credit Card",
                  "allows_refunds":1,
                  "allows_level3":1
                },
                "ECheckGateway":
                {
                  "gateway_id":"[Gateway ID]",
                  "alias":"Converge ACH",
                  "allows_refunds":0,
                  "allows_level3":1
                },
                "parent_client_id":"[Your Client ID]"
                }
              }
        }
      }