Example of how to use the mirror API to send your glass a url with https://developers.google.com/glass/playground

test.json

{
  "kind": "mirror#timelineItem",
  "id": "51e062f1-0aa7-4eaf-949e-d5fa6e1ade34",
  "created": "2013-08-15T05:47:16.873Z",
  "updated": "2013-08-17T05:48:39.025Z",
  "etag": "\"qrqSPos28fIbIGMRUHRGC7DJpNM/7NN5LvTKra5Wkm2lMw4Z_lDpYNg\"",
  "text": "http://www.google.com",
  "menuItems": [
    {
      "action": "VIEW_WEBSITE",
      "payload": "http://www.google.com"
    }
  ]
}