diff --git a/doc/lua_api.txt b/doc/lua_api.txt
index a03a95d9e..274704bef 100644
--- a/doc/lua_api.txt
+++ b/doc/lua_api.txt
@@ -1881,6 +1881,33 @@ Call these functions only at load time!
     * Called when a player joins the game
 * `minetest.register_on_leaveplayer(func(ObjectRef))`
     * Called when a player leaves the game
+* `minetest.register_on_inventory_move_item(func(inv_from,list_from,slot_from,inv_to,list_to,slot_to,stack,amount,player)`
+    * Called when a player move items between inventories using GUI (including crafting grid).
+    * `inv_from`: InvRef of inventory from which item was extracted.
+    * `list_from`: name of a list, where from stack extracted.
+    * `slot_from`: integer, speak by itself
+    * `inv_to`: InvRef of inventory to which item was dropped.
+    * `list_to`: name of a list, where to stack dropped.
+    * `slot_to`: integer, speak by itself
+    * `stack`: ItemStack of a stack moved
+    * `amount`: integer, amount of items, which was sucessfully transported
+    * `player`: ObjectRef of the player
+* `minetest.register_on_inventory_add_item(func(inv_to,list_to,stack,stack_left,player)`
+    * Called when a player recive item via digging or from item entity or when `player:add_item(list, item)` called.
+    * `inv_to`: InvRef of inventory to which item was added.
+    * `list_to`: name of a list, where stack was added.
+    * `slot_to`: integer, speak by itself
+    * `stack`: ItemStack of a stack added
+    * `stack_left`: ItemStack of a stack which was left on ground
+    * `player`: ObjectRef of the player
+* `minetest.register_on_inventory_drop_item(func(inv_from,list_from,slot_from,stack,player, dropped_pos)`
+    * Called when a player drop item on ground
+    * `inv_from`: InvRef of inventory from which item was dropped.
+    * `list_from`: name of a list, where from stack dropped. Usually 'main'.
+    * `slot_from`: integer, speak by itself
+    * `stack`: ItemStack of a stack dropped
+    * `player`: ObjectRef of the player
+    * `dropped_pos`: a table `{x=x_pos, y=y_pos, z=z_pos}`, where values contain absolute position of new item object.
 * `minetest.register_on_cheat(func(ObjectRef, cheat))`
     * Called when a player cheats
     * `cheat`: `{type=<cheat_type>}`, where `<cheat_type>` is one of:
@@ -2572,6 +2599,7 @@ This is basically a reference to a C++ `ServerActiveObject`
 * `get_hp()`: returns number of hitpoints (2 * number of hearts)
 * `set_hp(hp)`: set number of hitpoints (2 * number of hearts)
 * `get_inventory()`: returns an `InvRef`
+* `add_item(listname, stack)`: add item somewhere in list, returns leftover `ItemStack`. If object has no inventory, return `ItemStack`. Same as for `InvRef`, `player:add_item(listname, stack)` can be used instead of `player:get_inventory():add_item(listname, stack)`, but will launch callbacks registered by `minetest.register_on_inventory_add_item`.
 * `get_wield_list()`: returns the name of the inventory list the wielded item is in
 * `get_wield_index()`: returns the index of the wielded item
 * `get_wielded_item()`: returns an `ItemStack`