When a dashboard loads data from a protected JSON endpoint, authentication headers can be attached in the onBeginProcessData event.

Add custom headers before the data request.
var report = Stimulsoft.Report.StiReport.createNewDashboard();

report.onBeginProcessData = function (args) {
    if (args.database === "JSON" && args.command === "GetData" &&
        args.pathData && args.pathData.indexOf("/dashboard/ProtectedDemo.json") >= 0) {
        args.headers.push({ key: "X-Auth-Token", value: "*YOUR TOKEN*" });
    }
};

report.loadFile("../dashboard/DBSsimp.mrt");
viewer.report = report;

How it works. The engine applies the headers to its data request, so the dashboard can read endpoints behind token or session protection.
In the screenshot below you can see the result of the sample code:

Supply Custom Headers for Json Database

Hi. Need any help?