diff --git a/docs/index.md b/docs/index.md
index df704eba..655c692a 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -8,6 +8,7 @@
     - [Dimension](lua-api-dimension.md)
     - [Entity](lua-api-entity.md)
     - [Item](lua-api-item.md)
+    - [Key](lua-api-key.md)
     - [Recipe](lua-api-recipe.md)
     - [Sky](lua-api-sky.md)
     - [Tree](lua-api-tree.md)
diff --git a/docs/lua-api-key.md b/docs/lua-api-key.md
new file mode 100644
index 00000000..9da0dc9e
--- /dev/null
+++ b/docs/lua-api-key.md
@@ -0,0 +1,47 @@
+# Lua API: Key
+
+## Example
+
+```lua
+mod:key {
+	id = "inventory",
+	name = "Inventory",
+	default_key = "E"
+}
+
+mod:key_callback("default:inventory", function(client, screen_width, screen_height, gui_scale)
+	show_inventory(client, screen_width, screen_height, gui_scale)
+end)
+```
+
+## Attributes
+
+### `default_key`
+
+Keyboard key mapped to this key by default.
+
+Example:
+```lua
+default_key = "E"
+```
+
+### `name`
+
+Name of the key. Optional field, uses `id` if not defined.
+
+Example:
+```lua
+name = "Inventory"
+```
+
+### `id`
+
+ID of the key. **Mandatory field.**
+
+Example:
+```lua
+id = "inventory"
+```
+
+IDs are usually of the form `mod:key` but the `mod:` prefix is prepended automatically so it's not needed.
+
diff --git a/docs/lua-api-mod.md b/docs/lua-api-mod.md
index 09b53faf..d77b4c2e 100644
--- a/docs/lua-api-mod.md
+++ b/docs/lua-api-mod.md
@@ -128,6 +128,10 @@ Defines an entity from a table, see [this page](lua-api-entity.md) for more info
 
 Defines an item from a table, see [this page](lua-api-item.md) for more information.
 
+### `key`
+
+Defines a key from a table, see [this page](lua-api-key.md) for more information.
+
 ### `recipe`
 
 Defines a recipe from a table, see [this page](lua-api-recipe.md) for more information.
diff --git a/mkdocs.yml b/mkdocs.yml
index b4157d9f..f11b980c 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -12,6 +12,7 @@ nav:
         - 'Dimension': 'lua-api-dimension.md'
         - 'Entity': 'lua-api-entity.md'
         - 'Item': 'lua-api-item.md'
+        - 'Key': 'lua-api-key.md'
         - 'Recipe': 'lua-api-recipe.md'
         - 'Sky': 'lua-api-sky.md'
         - 'Tree': 'lua-api-tree.md'