Ajax returning error msg

I'm trying to access the post api and I'm getting an access error not allowed, follow the error screenshot:

Failed to load http://ws.correios.com.br/calculador/CalcPrecoPrazo.asmx/CalcPrecoPrazo: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://site.com' is therefore not allowed access.

And the code that does ajax:

        var params = {
            'nCdEmpresa': '',
            'sDsSenha': '',
            'nCdServico': '04014',
            'sCepOrigem': '03638010',
            'sCepDestino': '43810040',
            'nVlPeso': '1',
            'nCdFormato': '1',
            'nVlComprimento': '16',
            'nVlAltura': '5',
            'nVlLargura': '15',
            'nVlDiametro': '0',
            'sCdMaoPropria': 'n',
            'nVlValorDeclarado': '0',
            'sCdAvisoRecebimento': 'n',
            'StrRetorno': 'xml',
            'nCdServico': '40010,41106'
        };

        $.ajax({
            type: "POST",
            url: "http://ws.correios.com.br/calculador/CalcPrecoPrazo.asmx/CalcPrecoPrazo",
            data: params,
            contentType: "text/xml; charset=utf-8",
            dataType: "xml",
            success: function (data) {
                console.log(data);
            }
        });