Get all the web parts id of particular page using REST API.

The below code used to get the all the web parts id for the particular page.

function GetWebParts() {
    var executor = new SP.RequestExecutor(appweburl);
    var urltest = appweburl + "/_api/SP.AppContextSite(@target)/web/getfilebyserverrelativeurl('/sites/test017/Pages/default.aspx')/getlimitedwebpartmanager(scope=0)/WebParts?@target='" + hostweburl + "'";
    $.ajax({
        url: urltest,
        method: "GET",
        async: false,
        headers: {
            Accept: "application/json; odata=verbose"
        },
        success: function (data) {
            var d = "";
            if (data.d.results.length > 0) {
                for (var i = 0; i < data.d.results.length; i++) {
                    d += "<div>" + data.d.results[i].Id + "</div>"
                }
                $("#appWebLists").html(d);
            }
        },
        error: function (n) {
            SP.UI.Notify.addNotification("<span>Request failed. " + n.status + "\n" + n.statusText + "<\/span>");
        }
    });
}