Details - HeadDB

Warning: The UUIDs are not real.

Command

/give @p skull 1 3 {display:{Name:"O",Lore:["Skull from HeadDB.org"]},SkullOwner:{Id:"1a9a680e-6bda-39d7-8021-4dd3aad91aa2",Properties:{textures:[{Value:"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvZDExZGUxY2FkYjJhZGU2MTE0OWU1ZGVkMWJkODg1ZWRmMGRmNjI1OTI1NWIzM2I1ODdhOTZmOTgzYjJhMSJ9fX0="}]}}}

API Usage

GET https://headdb.org/api/head/1a9a680e-6bda-39d7-8021-4dd3aad91aa2

{
  "name": "O",
  "uuid": "1a9a680e-6bda-39d7-8021-4dd3aad91aa2",
  "value": "eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvZDExZGUxY2FkYjJhZGU2MTE0OWU1ZGVkMWJkODg1ZWRmMGRmNjI1OTI1NWIzM2I1ODdhOTZmOTgzYjJhMSJ9fX0=",
  "valueDecoded": {
    "textures": {
      "SKIN": {
        "url": "http://textures.minecraft.net/texture/d11de1cadb2ade61149e5ded1bd885edf0df6259255b33b587a96f983b2a1"
      }
    }
  },
  "command": "/give @p skull 1 3 {display:{Name:\"O\",Lore:[\"Skull from HeadDB.org\"]},SkullOwner:{Id:\"1a9a680e-6bda-39d7-8021-4dd3aad91aa2\",Properties:{textures:[{Value:\"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvZDExZGUxY2FkYjJhZGU2MTE0OWU1ZGVkMWJkODg1ZWRmMGRmNjI1OTI1NWIzM2I1ODdhOTZmOTgzYjJhMSJ9fX0=\"}]}}}"
}

Minecraft Head Database

GET https://headdb.org/api/head/1a9a680e-6bda-39d7-8021-4dd3aad91aa2