Details - HeadDB

Warning: The UUIDs are not real.

Command

/give @p skull 1 3 {display:{Name:"Z",Lore:["Skull from HeadDB.org"]},SkullOwner:{Id:"fb454209-d3db-32fd-a944-e449b5719fbe",Properties:{textures:[{Value:"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvOTA1ODJiOWI1ZDk3OTc0YjExNDYxZDYzZWNlZDg1ZjQzOGEzZWVmNWRjMzI3OWY5YzQ3ZTFlMzhlYTU0YWU4ZCJ9fX0="}]}}}

API Usage

GET https://headdb.org/api/head/fb454209-d3db-32fd-a944-e449b5719fbe

{
  "name": "Z",
  "uuid": "fb454209-d3db-32fd-a944-e449b5719fbe",
  "value": "eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvOTA1ODJiOWI1ZDk3OTc0YjExNDYxZDYzZWNlZDg1ZjQzOGEzZWVmNWRjMzI3OWY5YzQ3ZTFlMzhlYTU0YWU4ZCJ9fX0=",
  "valueDecoded": {
    "textures": {
      "SKIN": {
        "url": "http://textures.minecraft.net/texture/90582b9b5d97974b11461d63eced85f438a3eef5dc3279f9c47e1e38ea54ae8d"
      }
    }
  },
  "command": "/give @p skull 1 3 {display:{Name:\"Z\",Lore:[\"Skull from HeadDB.org\"]},SkullOwner:{Id:\"fb454209-d3db-32fd-a944-e449b5719fbe\",Properties:{textures:[{Value:\"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvOTA1ODJiOWI1ZDk3OTc0YjExNDYxZDYzZWNlZDg1ZjQzOGEzZWVmNWRjMzI3OWY5YzQ3ZTFlMzhlYTU0YWU4ZCJ9fX0=\"}]}}}"
}

Minecraft Head Database

GET https://headdb.org/api/head/fb454209-d3db-32fd-a944-e449b5719fbe