Bukkit

CustomItems c = (CustomItems) Bukkit.getServer().getPluginManager().getPlugin("CustomItems");
API api = (API) c.getAPI();

// api.addItem(name,displayName, ID, permission,color,userecipe,usecustom,lore, abilities,recipe,enchantments);

// Note: ID is minecraft item id

api.addItem("ItemName","Display item name", 276, false,"§1",false,true,lore_ArrayList, abilities_ArrayList,null,null);

api.Reload();

ItemStack item = api.createItem("ItemName");

api.addAbility("AbilityName");

// api.hasAbility(ItemStack, String);
api.hasAbility(itemStack, "AbilityName");

// api.isCustom(ItemStack);
api.isCustom(itemStack);