Details - HeadDB

Warning: The UUIDs are not real.

Command

/give @p skull 1 3 {display:{Name:"I",Lore:["Skull from HeadDB.org"]},SkullOwner:{Id:"afe0b518-5407-301f-a797-49bafc67b695",Properties:{textures:[{Value:"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvOGYyMjk1ODY1YmRhNGU0Nzk3OWQzNmI4YTg4N2E3NWExM2IwMzRlNjk4OGY3ODY3MGI2NGExZTY0NDJjIn19fQ=="}]}}}

API Usage

GET https://headdb.org/api/head/afe0b518-5407-301f-a797-49bafc67b695

{
  "name": "I",
  "uuid": "afe0b518-5407-301f-a797-49bafc67b695",
  "value": "eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvOGYyMjk1ODY1YmRhNGU0Nzk3OWQzNmI4YTg4N2E3NWExM2IwMzRlNjk4OGY3ODY3MGI2NGExZTY0NDJjIn19fQ==",
  "valueDecoded": {
    "textures": {
      "SKIN": {
        "url": "http://textures.minecraft.net/texture/8f2295865bda4e47979d36b8a887a75a13b034e6988f78670b64a1e6442c"
      }
    }
  },
  "command": "/give @p skull 1 3 {display:{Name:\"I\",Lore:[\"Skull from HeadDB.org\"]},SkullOwner:{Id:\"afe0b518-5407-301f-a797-49bafc67b695\",Properties:{textures:[{Value:\"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvOGYyMjk1ODY1YmRhNGU0Nzk3OWQzNmI4YTg4N2E3NWExM2IwMzRlNjk4OGY3ODY3MGI2NGExZTY0NDJjIn19fQ==\"}]}}}"
}

Minecraft Head Database

GET https://headdb.org/api/head/afe0b518-5407-301f-a797-49bafc67b695