Details - HeadDB

Warning: The UUIDs are not real.

Command

/give @p skull 1 3 {display:{Name:"G",Lore:["Skull from HeadDB.org"]},SkullOwner:{Id:"1a6b9772-758f-36c6-8a64-9d788451bfa8",Properties:{textures:[{Value:"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvOTk1ODYzYjczNjM3NjA1ZmVhY2JiMTczYjc3ZDVlMTU1ZTY1MjA0Yzc4ZDVjNzkxMWY3MzhmMjhkZWI2MCJ9fX0="}]}}}

API Usage

GET https://headdb.org/api/head/1a6b9772-758f-36c6-8a64-9d788451bfa8

{
  "name": "G",
  "uuid": "1a6b9772-758f-36c6-8a64-9d788451bfa8",
  "value": "eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvOTk1ODYzYjczNjM3NjA1ZmVhY2JiMTczYjc3ZDVlMTU1ZTY1MjA0Yzc4ZDVjNzkxMWY3MzhmMjhkZWI2MCJ9fX0=",
  "valueDecoded": {
    "textures": {
      "SKIN": {
        "url": "http://textures.minecraft.net/texture/995863b73637605feacbb173b77d5e155e65204c78d5c7911f738f28deb60"
      }
    }
  },
  "command": "/give @p skull 1 3 {display:{Name:\"G\",Lore:[\"Skull from HeadDB.org\"]},SkullOwner:{Id:\"1a6b9772-758f-36c6-8a64-9d788451bfa8\",Properties:{textures:[{Value:\"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvOTk1ODYzYjczNjM3NjA1ZmVhY2JiMTczYjc3ZDVlMTU1ZTY1MjA0Yzc4ZDVjNzkxMWY3MzhmMjhkZWI2MCJ9fX0=\"}]}}}"
}

Minecraft Head Database

GET https://headdb.org/api/head/1a6b9772-758f-36c6-8a64-9d788451bfa8