Json on the client

[diegojmap]

Can I access a client refuse via json?
   Str: = IdHTTP1.get ('http: // localhost: 8888 / api / sign / certificates');

If I use it on the server, of course, more if I use it on the client it gives the message

Socket Error # 10061

Would there be another way? Using javascript?

[diegojmap]

It works normally in the browser.
But I do not know how to list within the unigui.
I tried using URLFrame and this way
  UniSession.AddJS (
    '$ .get ("http: // localhost: 8888 / api / sign / certificates") .done (function (data) {' +
    'Console.log (data);' +
    ');'
    );

Only I could not play the information for some cotrole