Details - HeadDB

Warning: The UUIDs are not real.

Command

/give @p skull 1 3 {display:{Name:"K",Lore:["Skull from HeadDB.org"]},SkullOwner:{Id:"8aa1cdb9-278c-35fc-a4c4-c3e2155cfcfa",Properties:{textures:[{Value:"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvYWY0OWZiNzA4MzY5ZTdiYzI5NDRhZDcwNjk2M2ZiNmFjNmNlNmQ0YzY3MDgxZGRhZGVjZmU1ZGE1MSJ9fX0="}]}}}

API Usage

GET https://headdb.org/api/head/8aa1cdb9-278c-35fc-a4c4-c3e2155cfcfa

{
  "name": "K",
  "uuid": "8aa1cdb9-278c-35fc-a4c4-c3e2155cfcfa",
  "value": "eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvYWY0OWZiNzA4MzY5ZTdiYzI5NDRhZDcwNjk2M2ZiNmFjNmNlNmQ0YzY3MDgxZGRhZGVjZmU1ZGE1MSJ9fX0=",
  "valueDecoded": {
    "textures": {
      "SKIN": {
        "url": "http://textures.minecraft.net/texture/af49fb708369e7bc2944ad706963fb6ac6ce6d4c67081ddadecfe5da51"
      }
    }
  },
  "command": "/give @p skull 1 3 {display:{Name:\"K\",Lore:[\"Skull from HeadDB.org\"]},SkullOwner:{Id:\"8aa1cdb9-278c-35fc-a4c4-c3e2155cfcfa\",Properties:{textures:[{Value:\"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvYWY0OWZiNzA4MzY5ZTdiYzI5NDRhZDcwNjk2M2ZiNmFjNmNlNmQ0YzY3MDgxZGRhZGVjZmU1ZGE1MSJ9fX0=\"}]}}}"
}

Minecraft Head Database

GET https://headdb.org/api/head/8aa1cdb9-278c-35fc-a4c4-c3e2155cfcfa