Details - HeadDB

Warning: The UUIDs are not real.

Command

/give @p skull 1 3 {display:{Name:"R",Lore:["Skull from HeadDB.org"]},SkullOwner:{Id:"66f07eaf-0375-36c8-8c09-1b7e1915ffb9",Properties:{textures:[{Value:"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvNjdhMTg4ODA1MTYyY2E1ZGQ0ZjQ2NDljNjYxZDNmNmQyM2M0MjY2MmFlZjAxNjQ1YjFhOTdmNzhiM2YxMzIxOSJ9fX0="}]}}}

API Usage

GET https://headdb.org/api/head/66f07eaf-0375-36c8-8c09-1b7e1915ffb9

{
  "name": "R",
  "uuid": "66f07eaf-0375-36c8-8c09-1b7e1915ffb9",
  "value": "eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvNjdhMTg4ODA1MTYyY2E1ZGQ0ZjQ2NDljNjYxZDNmNmQyM2M0MjY2MmFlZjAxNjQ1YjFhOTdmNzhiM2YxMzIxOSJ9fX0=",
  "valueDecoded": {
    "textures": {
      "SKIN": {
        "url": "http://textures.minecraft.net/texture/67a188805162ca5dd4f4649c661d3f6d23c42662aef01645b1a97f78b3f13219"
      }
    }
  },
  "command": "/give @p skull 1 3 {display:{Name:\"R\",Lore:[\"Skull from HeadDB.org\"]},SkullOwner:{Id:\"66f07eaf-0375-36c8-8c09-1b7e1915ffb9\",Properties:{textures:[{Value:\"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvNjdhMTg4ODA1MTYyY2E1ZGQ0ZjQ2NDljNjYxZDNmNmQyM2M0MjY2MmFlZjAxNjQ1YjFhOTdmNzhiM2YxMzIxOSJ9fX0=\"}]}}}"
}

Minecraft Head Database

GET https://headdb.org/api/head/66f07eaf-0375-36c8-8c09-1b7e1915ffb9