string url = "http://api.multibot.in/in.php";
string IP_PROXY = "";
//IP_PROXY = "";
object obj = new{
    key = "key",
    url = "https://freebitco.in/",
    site_key = "data-sitekey рекапчи",
    method = "recaptcha"
};
string json = Global.ZennoLab.Json.JsonConvert.SerializeObject(obj);
ZennoLab.CommandCenter.CookieContainer cc = new ZennoLab.CommandCenter.CookieContainer();
string post = ZennoPoster.HTTP.Request(
  method: ZennoLab.InterfacesLibrary.Enums.Http.HttpMethod.POST,
  url: url,
  content: json,
  contentPostingType: "application/json;charset=UTF-8",
  proxy: IP_PROXY,
  Encoding: "UTF-8",
  respType:ZennoLab.InterfacesLibrary.Enums.Http.ResponceType.BodyOnly,
  Timeout: 30000,
  Cookies: string.Empty,
  UserAgent: project.Profile.UserAgent,
  UseRedirect: false,
  MaxRedirectCount: 0,
  AdditionalHeaders:new[]{string.Empty},
  DownloadPath: null,
  UseOriginalUrl: true,
  throwExceptionOnError: true,
  cookieContainer: cc
);