diff --git a/mods/minetest-3d_armor/api.lua b/mods/minetest-3d_armor/api.lua
new file mode 100644
index 00000000..e460a248
--- /dev/null
+++ b/mods/minetest-3d_armor/api.lua
@@ -0,0 +1,525 @@
+-- support for i18n
+local S = armor_i18n.gettext
+
+local skin_previews = {}
+local use_player_monoids = minetest.global_exists("player_monoids")
+local use_armor_monoid = minetest.global_exists("armor_monoid")
+local use_pova_mod = minetest.get_modpath("pova")
+local armor_def = setmetatable({}, {
+	__index = function()
+		return setmetatable({
+			groups = setmetatable({}, {
+				__index = function()
+					return 0
+				end})
+			}, {
+			__index = function()
+				return 0
+			end
+		})
+	end,
+})
+local armor_textures = setmetatable({}, {
+	__index = function()
+		return setmetatable({}, {
+			__index = function()
+				return "blank.png"
+			end
+		})
+	end
+})
+
+armor = {
+	timer = 0,
+	elements = {"head", "torso", "legs", "feet"},
+	physics = {"jump", "speed", "gravity"},
+	attributes = {"heal", "fire", "water"},
+	formspec = "image[2.5,0;2,4;armor_preview]"..
+		default.gui_bg..
+		default.gui_bg_img..
+		default.gui_slots..
+		default.get_hotbar_bg(0, 4.7)..
+		"list[current_player;main;0,4.7;8,1;]"..
+		"list[current_player;main;0,5.85;8,3;8]",
+	def = armor_def,
+	textures = armor_textures,
+	default_skin = "character",
+	materials = {
+		wood = "group:wood",
+		cactus = "default:cactus",
+		steel = "default:steel_ingot",
+		bronze = "default:bronze_ingot",
+		diamond = "default:diamond",
+		gold = "default:gold_ingot",
+		mithril = "moreores:mithril_ingot",
+		crystal = "ethereal:crystal_ingot",
+	},
+	fire_nodes = {
+		{"default:lava_source",     5, 8},
+		{"default:lava_flowing",    5, 8},
+		{"fire:basic_flame",        3, 4},
+		{"fire:permanent_flame",    3, 4},
+		{"ethereal:crystal_spike",  2, 1},
+		{"ethereal:fire_flower",    2, 1},
+		{"default:torch",           1, 1},
+		{"default:torch_ceiling",   1, 1},
+		{"default:torch_wall",      1, 1},
+	},
+	registered_groups = {["fleshy"]=100},
+	registered_callbacks = {
+		on_update = {},
+		on_equip = {},
+		on_unequip = {},
+		on_damage = {},
+		on_destroy = {},
+	},
+	migrate_old_inventory = true,
+	version = "0.4.13",
+}
+
+armor.config = {
+	init_delay = 2,
+	init_times = 10,
+	bones_delay = 1,
+	update_time = 1,
+	drop = minetest.get_modpath("bones") ~= nil,
+	destroy = false,
+	level_multiplier = 1,
+	heal_multiplier = 1,
+	material_wood = true,
+	material_cactus = true,
+	material_steel = true,
+	material_bronze = true,
+	material_diamond = true,
+	material_gold = true,
+	material_mithril = true,
+	material_crystal = true,
+	water_protect = true,
+	fire_protect = minetest.get_modpath("ethereal") ~= nil,
+	punch_damage = true,
+}
+
+-- Armor Registration
+
+armor.register_armor = function(self, name, def)
+	minetest.register_tool(name, def)
+end
+
+armor.register_armor_group = function(self, group, base)
+	base = base or 100
+	self.registered_groups[group] = base
+	if use_armor_monoid then
+		armor_monoid.register_armor_group(group, base)
+	end
+end
+
+-- Armor callbacks
+
+armor.register_on_update = function(self, func)
+	if type(func) == "function" then
+		table.insert(self.registered_callbacks.on_update, func)
+	end
+end
+
+armor.register_on_equip = function(self, func)
+	if type(func) == "function" then
+		table.insert(self.registered_callbacks.on_equip, func)
+	end
+end
+
+armor.register_on_unequip = function(self, func)
+	if type(func) == "function" then
+		table.insert(self.registered_callbacks.on_unequip, func)
+	end
+end
+
+armor.register_on_damage = function(self, func)
+	if type(func) == "function" then
+		table.insert(self.registered_callbacks.on_damage, func)
+	end
+end
+
+armor.register_on_destroy = function(self, func)
+	if type(func) == "function" then
+		table.insert(self.registered_callbacks.on_destroy, func)
+	end
+end
+
+armor.run_callbacks = function(self, callback, player, index, stack)
+	if stack then
+		local def = stack:get_definition() or {}
+		if type(def[callback]) == "function" then
+			def[callback](player, index, stack)
+		end
+	end
+	local callbacks = self.registered_callbacks[callback]
+	if callbacks then
+		for _, func in pairs(callbacks) do
+			func(player, index, stack)
+		end
+	end
+end
+
+armor.update_player_visuals = function(self, player)
+	if not player then
+		return
+	end
+	local name = player:get_player_name()
+	if self.textures[name] then
+		default.player_set_textures(player, {
+			self.textures[name].skin,
+			self.textures[name].armor,
+			self.textures[name].wielditem,
+		})
+	end
+	self:run_callbacks("on_update", player)
+end
+
+armor.set_player_armor = function(self, player)
+	local name, armor_inv = self:get_valid_player(player, "[set_player_armor]")
+	if not name then
+		return
+	end
+	local state = 0
+	local count = 0
+	local material = {count=1}
+	local preview = armor:get_preview(name)
+	local texture = "3d_armor_trans.png"
+	local textures = {}
+	local physics = {}
+	local attributes = {}
+	local levels = {}
+	local groups = {}
+	local change = {}
+	for _, phys in pairs(self.physics) do
+		physics[phys] = 1
+	end
+	for _, attr in pairs(self.attributes) do
+		attributes[attr] = 0
+	end
+	for group, _ in pairs(self.registered_groups) do
+		change[group] = 1
+		levels[group] = 0
+	end
+	local list = armor_inv:get_list("armor")
+	if type(list) ~= "table" then
+		return
+	end
+	for i, stack in pairs(list) do
+		if stack:get_count() == 1 then
+			local def = stack:get_definition()
+			for _, element in pairs(self.elements) do
+				if def.groups["armor_"..element] then
+					if def.armor_groups then
+						for group, level in pairs(def.armor_groups) do
+							if levels[group] then
+								levels[group] = levels[group] + level
+							end
+						end
+					else
+						local level = def.groups["armor_"..element]
+						levels["fleshy"] = levels["fleshy"] + level
+					end
+					break
+				end
+				-- DEPRECATED, use armor_groups instead
+				if def.groups["armor_radiation"] and levels["radiation"] then
+					levels["radiation"] = def.groups["armor_radiation"]
+				end
+			end
+			local item = stack:get_name()
+			local tex = def.texture or item:gsub("%:", "_")
+			tex = tex:gsub(".png$", "")
+			local prev = def.preview or tex.."_preview"
+			prev = prev:gsub(".png$", "")
+			texture = texture.."^"..tex..".png"
+			preview = preview.."^"..prev..".png"
+			state = state + stack:get_wear()
+			count = count + 1
+			for _, phys in pairs(self.physics) do
+				local value = def.groups["physics_"..phys] or 0
+				physics[phys] = physics[phys] + value
+			end
+			for _, attr in pairs(self.attributes) do
+				local value = def.groups["armor_"..attr] or 0
+				attributes[attr] = attributes[attr] + value
+			end
+			local mat = string.match(item, "%:.+_(.+)$")
+			if material.name then
+				if material.name == mat then
+					material.count = material.count + 1
+				end
+			else
+				material.name = mat
+			end
+		end
+	end
+	for group, level in pairs(levels) do
+		if level > 0 then
+			level = level * armor.config.level_multiplier
+			if material.name and material.count == #self.elements then
+				level = level * 1.1
+			end
+		end
+		local base = self.registered_groups[group]
+		self.def[name].groups[group] = level
+		if level > base then
+			level = base
+		end
+		groups[group] = base - level
+		change[group] = groups[group] / base
+	end
+	for _, attr in pairs(self.attributes) do
+		local mult = attr == "heal" and self.config.heal_multiplier or 1
+		self.def[name][attr] = attributes[attr] * mult
+	end
+	for _, phys in pairs(self.physics) do
+		self.def[name][phys] = physics[phys]
+	end
+	if use_armor_monoid then
+		armor_monoid.monoid:add_change(player, change, "3d_armor:armor")
+	else
+		player:set_armor_groups(groups)
+	end
+	if use_player_monoids then
+		player_monoids.speed:add_change(player, physics.speed,
+			"3d_armor:physics")
+		player_monoids.jump:add_change(player, physics.jump,
+			"3d_armor:physics")
+		player_monoids.gravity:add_change(player, physics.gravity,
+			"3d_armor:physics")
+	elseif use_pova_mod then
+		-- only add the changes, not the default 1.0 for each physics setting
+		pova.add_override(name, "3d_armor", {
+			speed = physics.speed - 1,
+			jump = physics.jump - 1,
+			gravity = physics.gravity - 1,
+		})
+		pova.do_override(player)
+	else
+		player:set_physics_override(physics)
+	end
+	self.textures[name].armor = texture
+	self.textures[name].preview = preview
+	self.def[name].level = self.def[name].groups.fleshy or 0
+	self.def[name].state = state
+	self.def[name].count = count
+	self:update_player_visuals(player)
+end
+
+armor.punch = function(self, player, hitter, time_from_last_punch, tool_capabilities)
+	local name, armor_inv = self:get_valid_player(player, "[punch]")
+	if not name then
+		return
+	end
+	local state = 0
+	local count = 0
+	local recip = true
+	local default_groups = {cracky=3, snappy=3, choppy=3, crumbly=3, level=1}
+	local list = armor_inv:get_list("armor")
+	for i, stack in pairs(list) do
+		if stack:get_count() == 1 then
+			local name = stack:get_name()
+			local use = minetest.get_item_group(name, "armor_use") or 0
+			local damage = use > 0
+			local def = stack:get_definition() or {}
+			if type(def.on_punched) == "function" then
+				damage = def.on_punched(player, hitter, time_from_last_punch,
+					tool_capabilities) ~= false and damage == true
+			end
+			if damage == true and tool_capabilities then
+				local damage_groups = def.damage_groups or default_groups
+				local level = damage_groups.level or 0
+				local groupcaps = tool_capabilities.groupcaps or {}
+				local uses = 0
+				damage = false
+				for group, caps in pairs(groupcaps) do
+					local maxlevel = caps.maxlevel or 0
+					local diff = maxlevel - level
+					if diff == 0 then
+						diff = 1
+					end
+					if diff > 0 and caps.times then
+						local group_level = damage_groups[group]
+						if group_level then
+							local time = caps.times[group_level]
+							if time then
+								local dt = time_from_last_punch or 0
+								if dt > time / diff then
+									if caps.uses then
+										uses = caps.uses * math.pow(3, diff)
+									end
+									damage = true
+									break
+								end
+							end
+						end
+					end
+				end
+				if damage == true and recip == true and hitter and
+						def.reciprocate_damage == true and uses > 0 then
+					local item = hitter:get_wielded_item()
+					if item and item:get_name() ~= "" then
+						item:add_wear(65535 / uses)
+						hitter:set_wielded_item(item)
+					end
+					-- reciprocate tool damage only once
+					recip = false
+				end
+			end
+			if damage == true and hitter == "fire" then
+				damage = minetest.get_item_group(name, "flammable") > 0
+			end
+			if damage == true then
+				self:damage(player, i, stack, use)
+			end
+			state = state + stack:get_wear()
+			count = count + 1
+		end
+	end
+	self.def[name].state = state
+	self.def[name].count = count
+end
+
+armor.damage = function(self, player, index, stack, use)
+	local old_stack = ItemStack(stack)
+	stack:add_wear(use)
+	self:run_callbacks("on_damage", player, index, stack)
+	self:set_inventory_stack(player, index, stack)
+	if stack:get_count() == 0 then
+		self:run_callbacks("on_unequip", player, index, old_stack)
+		self:run_callbacks("on_destroy", player, index, old_stack)
+		self:set_player_armor(player)
+	end
+end
+
+armor.get_player_skin = function(self, name)
+	if (self.skin_mod == "skins" or self.skin_mod == "simple_skins") and skins.skins[name] then
+		return skins.skins[name]..".png"
+	elseif self.skin_mod == "u_skins" and u_skins.u_skins[name] then
+		return u_skins.u_skins[name]..".png"
+	elseif self.skin_mod == "wardrobe" and wardrobe.playerSkins and wardrobe.playerSkins[name] then
+		return wardrobe.playerSkins[name]
+	end
+	return armor.default_skin..".png"
+end
+
+armor.add_preview = function(self, preview)
+	skin_previews[preview] = true
+end
+
+armor.get_preview = function(self, name)
+	local preview = string.gsub(armor:get_player_skin(name), ".png", "_preview.png")
+	if skin_previews[preview] then
+		return preview
+	end
+	return "character_preview.png"
+end
+
+armor.get_armor_formspec = function(self, name, listring)
+	if armor.def[name].init_time == 0 then
+		return "label[0,0;Armor not initialized!]"
+	end
+	local formspec = armor.formspec..
+		"list[detached:"..name.."_armor;armor;0,0.5;2,3;]"
+	if listring == true then
+		formspec = formspec.."listring[current_player;main]"..
+			"listring[detached:"..name.."_armor;armor]"
+	end
+	formspec = formspec:gsub("armor_preview", armor.textures[name].preview)
+	formspec = formspec:gsub("armor_level", armor.def[name].level)
+	for _, attr in pairs(self.attributes) do
+		formspec = formspec:gsub("armor_attr_"..attr, armor.def[name][attr])
+	end
+	for group, _ in pairs(self.registered_groups) do
+		formspec = formspec:gsub("armor_group_"..group,
+			armor.def[name].groups[group])
+	end
+	return formspec
+end
+
+armor.get_element = function(self, item_name)
+	for _, element in pairs(armor.elements) do
+		if minetest.get_item_group(item_name, "armor_"..element) > 0 then
+			return element
+		end
+	end
+end
+
+armor.serialize_inventory_list = function(self, list)
+	local list_table = {}
+	for _, stack in ipairs(list) do
+		table.insert(list_table, stack:to_string())
+	end
+	return minetest.serialize(list_table)
+end
+
+armor.deserialize_inventory_list = function(self, list_string)
+	local list_table = minetest.deserialize(list_string)
+	local list = {}
+	for _, stack in ipairs(list_table or {}) do
+		table.insert(list, ItemStack(stack))
+	end
+	return list
+end
+
+armor.load_armor_inventory = function(self, player)
+	local _, inv = self:get_valid_player(player, "[load_armor_inventory]")
+	if inv then
+		local armor_list_string = player:get_attribute("3d_armor_inventory")
+		if armor_list_string then
+			inv:set_list("armor",
+				self:deserialize_inventory_list(armor_list_string))
+			return true
+		end
+	end
+end
+
+armor.save_armor_inventory = function(self, player)
+	local _, inv = self:get_valid_player(player, "[save_armor_inventory]")
+	if inv then
+		player:set_attribute("3d_armor_inventory",
+			self:serialize_inventory_list(inv:get_list("armor")))
+	end
+end
+
+armor.update_inventory = function(self, player)
+	-- DEPRECATED: Legacy inventory support
+end
+
+armor.set_inventory_stack = function(self, player, i, stack)
+	local _, inv = self:get_valid_player(player, "[set_inventory_stack]")
+	if inv then
+		inv:set_stack("armor", i, stack)
+		self:save_armor_inventory(player)
+	end
+end
+
+armor.get_valid_player = function(self, player, msg)
+	msg = msg or ""
+	if not player then
+		minetest.log("warning", S("3d_armor: Player reference is nil @1", msg))
+		return
+	end
+	local name = player:get_player_name()
+	if not name then
+		minetest.log("warning", S("3d_armor: Player name is nil @1", msg))
+		return
+	end
+	local inv = minetest.get_inventory({type="detached", name=name.."_armor"})
+	if not inv then
+		minetest.log("warning", S("3d_armor: Detached armor inventory is nil @1", msg))
+		return
+	end
+	return name, inv
+end
+
+armor.drop_armor = function(pos, stack)
+	local node = minetest.get_node_or_nil(pos)
+	if node then
+		local obj = minetest.add_item(pos, stack)
+		if obj then
+			obj:setvelocity({x=math.random(-1, 1), y=5, z=math.random(-1, 1)})
+		end
+	end
+end