Filtrar texto Delphi - Lazarus

unit Unit1;

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, StdCtrls;

type

  { TForm1 }

  TForm1 = class(TForm)
    Button2: TButton;
    procedure Button2Click(Sender: TObject);
  private
    { private declarations }
  public
    { public declarations }
  end;

var
  Form1: TForm1;
  var status:string;

implementation

uses   fphttpclient, fpjson, jsonparser;

{$R *.lfm}

{ TForm1 }

procedure TForm1.Button2Click(Sender: TObject);

 var
  R: TJSONData;
  J: TJSONObject absolute R;

begin
  R := GetJSON(TFPHTTPClient.SimpleGet('http://site aqui'));
  try
//Aqui defino que o que vir depois de status e for inteiro eu pego de retorno de mostro no message, mas poderia colocar numa variável.
    ShowMessageFmt('%d', [J['status'].AsInteger]);
  finally
    R.Free
  end;
end;

end.