jquery - How to fix Access-Control-Allow-Origin error from a remote site -

i'm trying use service @ http://rate-exchange.appspot.com/currency, the access-control-allow-origin error.

understanding server problem, , http://rate-exchange.appspot.com/currency not service, have no idea how fix problem.

using service this:

$.getjson("http://rate-exchange.appspot.com/currency", { "from": currency.from, "to": currency.to }, function (result) {     if (!result.err) {         currency.rate = result.rate;         $("#footer-output").text("all sales in " + currency.to + " including vat");     }     else {         $("#footer-output").text("all sales in local currency including vat");     } }); 

now trying data directly in browser not problem. there can do, or can fixed on server?

the following work. took liberty of adding currency object code. part defining elsewhere.

plunkr: http://beta.plnkr.co/amvpve9kuppcsd0ma5s3

code:

$(function(){  currency = {};  currency.from = "usd";  currency.to = "pen";  currency.rate= 0;  $.getjson("http://rate-exchange.appspot.com/currency?callback=?", { "from": currency.from, "to": currency.to }, function (result) {     if (!result.err) {         currency.rate = result.rate;         $("#footer-output").text("all sales in " + currency.to + " including vat");     }     else {         $("#footer-output").text("all sales in local currency including vat");     } }); 

adding callback=? url , jquery issue jsonp request. here section docs (halfway down): http://api.jquery.com/jquery.getjson/

jsonp

if url includes string "callback=?" (or similar, defined server-side api), request treated jsonp instead. see discussion of jsonp data type in $.ajax() more details.