Details - HeadDB

Warning: The UUIDs are not real.

Command

/give @p skull 1 3 {display:{Name:"J",Lore:["Skull from HeadDB.org"]},SkullOwner:{Id:"f5ba21fc-2dfd-32bd-ada8-0218f4558db7",Properties:{textures:[{Value:"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvZTM0NDYyYjU1ZDdmNTgyMzY4MGFkMTNmMmFkYmQ3ZDFlZDQ2YmE1MTAxMDE3ZWQ0YjM3YWVlZWI3NzVkIn19fQ=="}]}}}

API Usage

GET https://headdb.org/api/head/f5ba21fc-2dfd-32bd-ada8-0218f4558db7

{
  "name": "J",
  "uuid": "f5ba21fc-2dfd-32bd-ada8-0218f4558db7",
  "value": "eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvZTM0NDYyYjU1ZDdmNTgyMzY4MGFkMTNmMmFkYmQ3ZDFlZDQ2YmE1MTAxMDE3ZWQ0YjM3YWVlZWI3NzVkIn19fQ==",
  "valueDecoded": {
    "textures": {
      "SKIN": {
        "url": "http://textures.minecraft.net/texture/e34462b55d7f5823680ad13f2adbd7d1ed46ba5101017ed4b37aeeeb775d"
      }
    }
  },
  "command": "/give @p skull 1 3 {display:{Name:\"J\",Lore:[\"Skull from HeadDB.org\"]},SkullOwner:{Id:\"f5ba21fc-2dfd-32bd-ada8-0218f4558db7\",Properties:{textures:[{Value:\"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvZTM0NDYyYjU1ZDdmNTgyMzY4MGFkMTNmMmFkYmQ3ZDFlZDQ2YmE1MTAxMDE3ZWQ0YjM3YWVlZWI3NzVkIn19fQ==\"}]}}}"
}

Minecraft Head Database

GET https://headdb.org/api/head/f5ba21fc-2dfd-32bd-ada8-0218f4558db7