How can I get Authorization OAuth token?

API
15

For Helix you need to send the client ID has a header, it cannot be passed as part of the URL. Most libraries can do that easily though.

jQuery example:

jQuery.ajax({
   type: 'GET',
   url: 'https://api.twitch.tv/helix/streams?user_login=lirik',
   headers: {
     'Client-ID': 'YOUR-CLIENT-ID'
   },
   success: function(c){
      //data array is empty when queried channel is offline
      if (c.data.length > 0) { 
        //Stream is online
      } else {
        //Stream is offline
      }
   }
});