python -c 'import json, sys, urllib;
  print(json.dumps(json.loads(urllib.urlopen(sys.argv[1]).read()), indent=2))' http://169.254.169.254/openstack/latest/network_data.json 

{
  "services": [
    {
      "type": "dns", 
      "address": "199.204.44.24"
    }, 
    {
      "type": "dns", 
      "address": "199.204.47.54"
    }
  ], 
  "networks": [
    {
      "network_id": "6d6357ac-0f70-4afa-8bd7-c274cc4ea235", 
      "type": "ipv4_dhcp", 
      "link": "tap2ecc7709-b3", 
      "id": "network0"
    }, 
    {
      "network_id": "d227a9b3-6960-4d94-8976-ee5788b44f54", 
      "type": "ipv4_dhcp", 
      "link": "tap2f88d109-5b", 
      "id": "network1"
    }, 
    {
      "network_id": "dab2ba57-cae2-4311-a5ed-010b263891f5", 
      "type": "ipv4_dhcp", 
      "link": "tap1a5382f8-04", 
      "id": "network2"
    }
  ], 
  "links": [
    {
      "type": "ovs", 
      "vif_id": "2ecc7709-b3f7-4448-9580-e1ec32d75bbd", 
      "ethernet_mac_address": "fa:16:3e:69:b0:58", 
      "id": "tap2ecc7709-b3", 
      "mtu": null
    }, 
    {
      "type": "ovs", 
      "vif_id": "2f88d109-5b57-40e6-af32-2472df09dc33", 
      "ethernet_mac_address": "fa:16:3e:d4:57:ad", 
      "id": "tap2f88d109-5b", 
      "mtu": null
    }, 
    {
      "type": "ovs", 
      "vif_id": "1a5382f8-04c5-4d75-ab98-d666c1ef52cc", 
      "ethernet_mac_address": "fa:16:3e:05:30:fe", 
      "id": "tap1a5382f8-04", 
      "mtu": null
    }
  ]
}