Getting 401 error when hitting search article endpoint.

I started getting 401 error when I make a call to search the articles. I am using oauth token and sending that on the header 'Bearer'. This has worked previously and was able to get results and even tested paging and I see the results in the response. Now I get 401 unauthorized. I even tried regenerating the oauth token.

        $.ajax({
            url: "https://domain.zendesk.com/api/v2/help_center/articles/search.json?query=keyword",
            headers : {
                'Access-Control-Allow-Origin' : "*",
                'Authorization' : "Bearer " + oauth
            },
            data : {
                page : 1,
                per_page : 5,
                scropes: ["read"]
            },
            crossDomain: true,
            dataType: 'jsonp',
            cache: false,
            type: "GET",
            success: function(response) {
                
            },
            error: function(xhr) {
        
            
            }
        });