OpenText Rest Api Error

Migrateduser

Error : Access to XMLHttpRequest at 'http:///api/v1/auth' from origin 'http://localhost:3002' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

While calling OpenText Rest Api throwing above error using below code :

var otcsticket = '';
$.ajax({
        // Authenticate is a POST
        type: "POST",
        url: "http:///api/v1/auth",
        data: { username: "user", password: "password" },
        beforeSend: function (xhr) {
            // Set the correct MimeType for the request.
            xhr.overrideMimeType("application/x-www-form-urlencoded")
        }
    }).done(function (data) {
        var val = JSON.parse(data);
        alert("setting otcsticket to: " + val["ticket"]);
        // Store the ticket for later use.
        otcsticket = val["ticket"];
    }).fail( function( error ) {
console.log(error)
alert("Bad thing happened! " + error.statusText);
});

• Any suggestion
• Any server end setting to allow CORS ?