Details - HeadDB

Warning: The UUIDs are not real.

Command

/give @p skull 1 3 {display:{Name:"Y",Lore:["Skull from HeadDB.org"]},SkullOwner:{Id:"04a0cebc-7cfa-3d9c-a193-5aeef65c1091",Properties:{textures:[{Value:"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvYzUyZmIzODhlMzMyMTJhMjQ3OGI1ZTE1YTk2ZjI3YWNhNmM2MmFjNzE5ZTFlNWY4N2ExY2YwZGU3YjE1ZTkxOCJ9fX0="}]}}}

API Usage

GET https://headdb.org/api/head/04a0cebc-7cfa-3d9c-a193-5aeef65c1091

{
  "name": "Y",
  "uuid": "04a0cebc-7cfa-3d9c-a193-5aeef65c1091",
  "value": "eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvYzUyZmIzODhlMzMyMTJhMjQ3OGI1ZTE1YTk2ZjI3YWNhNmM2MmFjNzE5ZTFlNWY4N2ExY2YwZGU3YjE1ZTkxOCJ9fX0=",
  "valueDecoded": {
    "textures": {
      "SKIN": {
        "url": "http://textures.minecraft.net/texture/c52fb388e33212a2478b5e15a96f27aca6c62ac719e1e5f87a1cf0de7b15e918"
      }
    }
  },
  "command": "/give @p skull 1 3 {display:{Name:\"Y\",Lore:[\"Skull from HeadDB.org\"]},SkullOwner:{Id:\"04a0cebc-7cfa-3d9c-a193-5aeef65c1091\",Properties:{textures:[{Value:\"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvYzUyZmIzODhlMzMyMTJhMjQ3OGI1ZTE1YTk2ZjI3YWNhNmM2MmFjNzE5ZTFlNWY4N2ExY2YwZGU3YjE1ZTkxOCJ9fX0=\"}]}}}"
}

Minecraft Head Database

GET https://headdb.org/api/head/04a0cebc-7cfa-3d9c-a193-5aeef65c1091