Details - HeadDB

Warning: The UUIDs are not real.

Command

/give @p skull 1 3 {display:{Name:"H",Lore:["Skull from HeadDB.org"]},SkullOwner:{Id:"85de4a13-f3ed-3fb4-88c3-dfcfe5a1ffb2",Properties:{textures:[{Value:"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvMzFmMzQ2MmE0NzM1NDlmMTQ2OWY4OTdmODRhOGQ0MTE5YmM3MWQ0YTVkODUyZTg1YzI2YjU4OGE1YzBjNzJmIn19fQ=="}]}}}

API Usage

GET https://headdb.org/api/head/85de4a13-f3ed-3fb4-88c3-dfcfe5a1ffb2

{
  "name": "H",
  "uuid": "85de4a13-f3ed-3fb4-88c3-dfcfe5a1ffb2",
  "value": "eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvMzFmMzQ2MmE0NzM1NDlmMTQ2OWY4OTdmODRhOGQ0MTE5YmM3MWQ0YTVkODUyZTg1YzI2YjU4OGE1YzBjNzJmIn19fQ==",
  "valueDecoded": {
    "textures": {
      "SKIN": {
        "url": "http://textures.minecraft.net/texture/31f3462a473549f1469f897f84a8d4119bc71d4a5d852e85c26b588a5c0c72f"
      }
    }
  },
  "command": "/give @p skull 1 3 {display:{Name:\"H\",Lore:[\"Skull from HeadDB.org\"]},SkullOwner:{Id:\"85de4a13-f3ed-3fb4-88c3-dfcfe5a1ffb2\",Properties:{textures:[{Value:\"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvMzFmMzQ2MmE0NzM1NDlmMTQ2OWY4OTdmODRhOGQ0MTE5YmM3MWQ0YTVkODUyZTg1YzI2YjU4OGE1YzBjNzJmIn19fQ==\"}]}}}"
}

Minecraft Head Database

GET https://headdb.org/api/head/85de4a13-f3ed-3fb4-88c3-dfcfe5a1ffb2