diff --git a/README.md b/README.md
index 62c2f9c7..4c18f860 100644
--- a/README.md
+++ b/README.md
@@ -180,6 +180,20 @@ ItemStack[] inventoryItems = DataSerializer.serializeInventory(playerData.getSer
 ItemStack[] enderChestItems = DataSerializer.serializeInventory(playerData.getSerializedEnderChest());
 ```
 
+#### Updating PlayerData
+You can then update PlayerData back to the central cache using the `HuskSyncAPI#updatePlayerData(playerData)` method. For example:
+```
+// Update a value in the player data object
+playerData.setHealth(20);
+try {
+    // Update the player data to the cache
+    huskSyncApi.updatePlayerData(playerData);
+} catch (IOException e) {
+    Bukkit.getLogger().severe("An error occurred updating player data!");
+}
+```
+
+
 ### Contributing
 A code bounty program is in place for HuskSync, where developers making significant code contributions to HuskSync may be entitled to a discretionary license to use HuskSync in commercial contexts without having to purchase the resource, so please feel free to submit pull requests with improvements, fixes and features!
 
@@ -207,4 +221,4 @@ You can turn metric collection off by navigating to `plugins/bStats/config.yml`
 ## Support
 * Report bugs: [Click here](https://github.com/WiIIiam278/HuskSync/issues)
 * Discord support: Join the [HuskHelp Discord](https://discord.gg/tVYhJfyDWG)!
-    * Proof of purchase is required for support.
+    * Proof of purchase is required for support.
\ No newline at end of file
diff --git a/api/src/main/java/me/william278/husksync/bukkit/api/HuskSyncAPI.java b/api/src/main/java/me/william278/husksync/bukkit/api/HuskSyncAPI.java
index 3272e7df..c3dc8ade 100644
--- a/api/src/main/java/me/william278/husksync/bukkit/api/HuskSyncAPI.java
+++ b/api/src/main/java/me/william278/husksync/bukkit/api/HuskSyncAPI.java
@@ -57,4 +57,17 @@ public class HuskSyncAPI {
         return playerDataCompletableFuture;
     }
 
+    /**
+     * Updates a player's {@link PlayerData} to the central cache and database. If the player is online on the Proxy network, they will be updated and overwritten with this data.
+     *
+     * @param playerData The {@link PlayerData} (which contains the {@link UUID}) of the player data to update to the central cache and database
+     * @throws IOException If an exception occurs with serializing during processing of the update
+     */
+    public void updatePlayerData(PlayerData playerData) throws IOException {
+        final String serializedPlayerData = RedisMessage.serialize(playerData);
+        new RedisMessage(RedisMessage.MessageType.PLAYER_DATA_UPDATE,
+                new RedisMessage.MessageTarget(Settings.ServerType.PROXY, null, Settings.cluster),
+                serializedPlayerData).send();
+    }
+
 }
\ No newline at end of file
diff --git a/bukkit/src/main/java/me/william278/husksync/bukkit/util/PlayerSetter.java b/bukkit/src/main/java/me/william278/husksync/bukkit/util/PlayerSetter.java
index 9be2ffba..875417f7 100644
--- a/bukkit/src/main/java/me/william278/husksync/bukkit/util/PlayerSetter.java
+++ b/bukkit/src/main/java/me/william278/husksync/bukkit/util/PlayerSetter.java
@@ -142,7 +142,7 @@ public class PlayerSetter {
             }
 
             // If the data is flagged as being default data, skip setting
-            if (data.isUseDefaultData()) {
+            if (data.useDefaultData) {
                 HuskSyncBukkit.bukkitCache.removeAwaitingDataFetch(player.getUniqueId());
                 return;
             }
diff --git a/common/src/main/java/me/william278/husksync/PlayerData.java b/common/src/main/java/me/william278/husksync/PlayerData.java
index 030169b5..79817200 100644
--- a/common/src/main/java/me/william278/husksync/PlayerData.java
+++ b/common/src/main/java/me/william278/husksync/PlayerData.java
@@ -3,6 +3,9 @@ package me.william278.husksync;
 import java.io.*;
 import java.util.UUID;
 
+/**
+ * Cross-platform class used to represent a player's data. Data from this can be deserialized using the DataSerializer class on Bukkit platforms.
+ */
 public class PlayerData implements Serializable {
 
     /**
@@ -15,10 +18,14 @@ public class PlayerData implements Serializable {
      */
     private final UUID dataVersionUUID;
 
-    // Flag to indicate if the Bukkit server should use default data
+    /**
+     * A special flag that will be {@code true} if the player is new to the network and should not have their data set when joining the Bukkit
+     */
     public boolean useDefaultData = false;
 
-    // Player data
+    /*
+     * Player data records
+     */
     private String serializedInventory;
     private String serializedEnderChest;
     private double health;
@@ -55,7 +62,7 @@ public class PlayerData implements Serializable {
      * @param totalExperience         Their total experience points ("Score")
      * @param expLevel                Their exp level
      * @param expProgress             Their exp progress to the next level
-     * @param gameMode                Their game mode ({@code SURVIVAL}, {@code CREATIVE}, etc)
+     * @param gameMode                Their game mode ({@code SURVIVAL}, {@code CREATIVE}, etc.)
      * @param serializedStatistics    Their serialized statistics data (Displayed in Statistics menu in ESC menu)
      */
     public PlayerData(UUID playerUUID, String serializedInventory, String serializedEnderChest, double health, double maxHealth,
@@ -147,156 +154,344 @@ public class PlayerData implements Serializable {
         return data;
     }
 
+    /**
+     * Get the {@link UUID} of the player whose data this is
+     *
+     * @return the player's {@link UUID}
+     */
     public UUID getPlayerUUID() {
         return playerUUID;
     }
 
+    /**
+     * Get the unique version {@link UUID} of the PlayerData
+     *
+     * @return The unique data version
+     */
     public UUID getDataVersionUUID() {
         return dataVersionUUID;
     }
 
+    /**
+     * Returns the serialized player {@code ItemStack[]} inventory
+     *
+     * @return The player's serialized inventory
+     */
     public String getSerializedInventory() {
         return serializedInventory;
     }
 
+    /**
+     * Returns the serialized player {@code ItemStack[]} ender chest
+     *
+     * @return The player's serialized ender chest
+     */
     public String getSerializedEnderChest() {
         return serializedEnderChest;
     }
 
+    /**
+     * Returns the player's health value
+     *
+     * @return the player's health
+     */
     public double getHealth() {
         return health;
     }
 
+    /**
+     * Returns the player's max health value
+     *
+     * @return the player's max health
+     */
     public double getMaxHealth() {
         return maxHealth;
     }
 
-    public double getHealthScale() { return healthScale; }
+    /**
+     * Returns the player's health scale value {@see https://hub.spigotmc.org/javadocs/bukkit/org/bukkit/entity/Player.html#getHealthScale()}
+     *
+     * @return the player's health scaling value
+     */
+    public double getHealthScale() {
+        return healthScale;
+    }
 
+    /**
+     * Returns the player's hunger points
+     *
+     * @return the player's hunger level
+     */
     public int getHunger() {
         return hunger;
     }
 
+    /**
+     * Returns the player's saturation points
+     *
+     * @return the player's saturation level
+     */
     public float getSaturation() {
         return saturation;
     }
 
+    /**
+     * Returns the player's saturation exhaustion value {@see https://hub.spigotmc.org/javadocs/bukkit/org/bukkit/entity/HumanEntity.html#getExhaustion()}
+     *
+     * @return the player's saturation exhaustion
+     */
     public float getSaturationExhaustion() {
         return saturationExhaustion;
     }
 
+    /**
+     * Returns the number of the player's currently selected hotbar slot
+     *
+     * @return the player's selected hotbar slot
+     */
     public int getSelectedSlot() {
         return selectedSlot;
     }
 
+    /**
+     * Returns a serialized {@link String} of the player's current status effects
+     *
+     * @return the player's serialized status effect data
+     */
     public String getSerializedEffectData() {
         return serializedEffectData;
     }
 
+    /**
+     * Returns the player's total experience score (used for presenting the death screen score value)
+     *
+     * @return the player's total experience score
+     */
     public int getTotalExperience() {
         return totalExperience;
     }
 
+    /**
+     * Returns a serialized {@link String} of the player's statistics
+     *
+     * @return the player's serialized statistic records
+     */
     public String getSerializedStatistics() {
         return serializedStatistics;
     }
 
+    /**
+     * Returns the player's current experience level
+     *
+     * @return the player's exp level
+     */
     public int getExpLevel() {
         return expLevel;
     }
 
+    /**
+     * Returns the player's progress to the next experience level
+     *
+     * @return the player's exp progress
+     */
     public float getExpProgress() {
         return expProgress;
     }
 
+    /**
+     * Returns the player's current game mode as a string ({@code SURVIVAL}, {@code CREATIVE}, etc.)
+     *
+     * @return the player's game mode
+     */
     public String getGameMode() {
         return gameMode;
     }
 
+    /**
+     * Returns if the player is currently flying
+     *
+     * @return {@code true} if the player is in flight; {@code false} otherwise
+     */
     public boolean isFlying() {
         return isFlying;
     }
 
+    /**
+     * Returns a serialized {@link String} of the player's advancements
+     *
+     * @return the player's serialized advancement data
+     */
     public String getSerializedAdvancements() {
         return serializedAdvancements;
     }
 
+    /**
+     * Returns a serialized {@link String} of the player's current location
+     *
+     * @return the player's serialized location
+     */
     public String getSerializedLocation() {
         return serializedLocation;
     }
 
-    public boolean isUseDefaultData() {
-        return useDefaultData;
-    }
-
+    /**
+     * Update the player's inventory data
+     *
+     * @param serializedInventory A serialized {@code String}; new inventory data
+     */
     public void setSerializedInventory(String serializedInventory) {
         this.serializedInventory = serializedInventory;
     }
 
+    /**
+     * Update the player's ender chest data
+     *
+     * @param serializedEnderChest A serialized {@code String}; new ender chest inventory data
+     */
     public void setSerializedEnderChest(String serializedEnderChest) {
         this.serializedEnderChest = serializedEnderChest;
     }
 
+    /**
+     * Update the player's health
+     *
+     * @param health new health value
+     */
     public void setHealth(double health) {
         this.health = health;
     }
 
+    /**
+     * Update the player's max health
+     *
+     * @param maxHealth new maximum health value
+     */
     public void setMaxHealth(double maxHealth) {
         this.maxHealth = maxHealth;
     }
 
+    /**
+     * Update the player's health scale
+     *
+     * @param healthScale new health scaling value
+     */
     public void setHealthScale(double healthScale) {
         this.healthScale = healthScale;
     }
 
+    /**
+     * Update the player's hunger meter
+     *
+     * @param hunger new hunger value
+     */
     public void setHunger(int hunger) {
         this.hunger = hunger;
     }
 
+    /**
+     * Update the player's saturation level
+     *
+     * @param saturation new saturation value
+     */
     public void setSaturation(float saturation) {
         this.saturation = saturation;
     }
 
+    /**
+     * Update the player's saturation exhaustion value
+     *
+     * @param saturationExhaustion new exhaustion value
+     */
     public void setSaturationExhaustion(float saturationExhaustion) {
         this.saturationExhaustion = saturationExhaustion;
     }
 
+    /**
+     * Update the player's selected hotbar slot
+     *
+     * @param selectedSlot new hotbar slot number (0-9)
+     */
     public void setSelectedSlot(int selectedSlot) {
         this.selectedSlot = selectedSlot;
     }
 
+    /**
+     * Update the player's status effect data
+     *
+     * @param serializedEffectData A serialized {@code String} of the player's new status effect data
+     */
     public void setSerializedEffectData(String serializedEffectData) {
         this.serializedEffectData = serializedEffectData;
     }
 
+    /**
+     * Set the player's total experience points (used to display score on death screen)
+     *
+     * @param totalExperience the player's new total experience score
+     */
     public void setTotalExperience(int totalExperience) {
         this.totalExperience = totalExperience;
     }
 
+    /**
+     * Set the player's exp level
+     *
+     * @param expLevel the player's new exp level
+     */
     public void setExpLevel(int expLevel) {
         this.expLevel = expLevel;
     }
 
+    /**
+     * Set the player's progress to their next exp level
+     *
+     * @param expProgress the player's new experience progress
+     */
     public void setExpProgress(float expProgress) {
         this.expProgress = expProgress;
     }
 
+    /**
+     * Set the player's game mode
+     *
+     * @param gameMode the player's new game mode ({@code SURVIVAL}, {@code CREATIVE}, etc.)
+     */
     public void setGameMode(String gameMode) {
         this.gameMode = gameMode;
     }
 
+    /**
+     * Update the player's statistics data
+     *
+     * @param serializedStatistics A serialized {@code String}; new statistic data
+     */
     public void setSerializedStatistics(String serializedStatistics) {
         this.serializedStatistics = serializedStatistics;
     }
 
+    /**
+     * Set if the player is flying
+     *
+     * @param flying whether the player is flying
+     */
     public void setFlying(boolean flying) {
         isFlying = flying;
     }
 
+    /**
+     * Update the player's advancement data
+     *
+     * @param serializedAdvancements A serialized {@code String}; new advancement data
+     */
     public void setSerializedAdvancements(String serializedAdvancements) {
         this.serializedAdvancements = serializedAdvancements;
     }
 
+    /**
+     * Update the player's location data
+     *
+     * @param serializedLocation A serialized {@code String}; new location data
+     */
     public void setSerializedLocation(String serializedLocation) {
         this.serializedLocation = serializedLocation;
     }
diff --git a/common/src/main/java/me/william278/husksync/redis/RedisMessage.java b/common/src/main/java/me/william278/husksync/redis/RedisMessage.java
index 8f7d7df5..951bbbb9 100644
--- a/common/src/main/java/me/william278/husksync/redis/RedisMessage.java
+++ b/common/src/main/java/me/william278/husksync/redis/RedisMessage.java
@@ -90,7 +90,7 @@ public class RedisMessage {
      */
     public enum MessageType implements Serializable {
         /**
-         * Sent by Bukkit servers to proxy when a player disconnects with a player's updated data, alongside the UUID of the last loaded {@link PlayerData} for the user
+         * Sent by Bukkit servers to proxy when a user disconnects with that player's updated {@link PlayerData}.
          */
         PLAYER_DATA_UPDATE,
 
@@ -105,12 +105,12 @@ public class RedisMessage {
         PLAYER_DATA_SET,
 
         /**
-         * Sent by Bukkit servers to proxy to request {@link PlayerData} from the proxy via the API
+         * Sent by Bukkit servers to proxy to request {@link PlayerData} from the proxy via the API.
          */
         API_DATA_REQUEST,
 
         /**
-         * Sent by the Proxy to fulfill an {@code MessageType.API_DATA_REQUEST}, containing the latest {@link PlayerData} for the requested UUID
+         * Sent by the Proxy to fulfill an {@code MessageType.API_DATA_REQUEST}, containing the latest {@link PlayerData} for the requested UUID.
          */
         API_DATA_RETURN,
 
@@ -120,47 +120,47 @@ public class RedisMessage {
         API_DATA_CANCEL,
 
         /**
-         * Sent by the proxy to a Bukkit server to have them request data on join; contains no data otherwise
+         * Sent by the proxy to a Bukkit server to have them request data on join; contains no data otherwise.
          */
         REQUEST_DATA_ON_JOIN,
 
         /**
-         * Sent by the proxy to ask the Bukkit server to send the full plugin information, contains information about the proxy brand and version
+         * Sent by the proxy to ask the Bukkit server to send the full plugin information, contains information about the proxy brand and version.
          */
         SEND_PLUGIN_INFORMATION,
 
         /**
-         * Sent by the proxy to show a player the contents of another player's inventory, contains their username and {@link PlayerData}
+         * Sent by the proxy to show a player the contents of another player's inventory, contains their username and {@link PlayerData}.
          */
         OPEN_INVENTORY,
 
         /**
-         * Sent by the proxy to show a player the contents of another player's ender chest, contains their username and {@link PlayerData}
+         * Sent by the proxy to show a player the contents of another player's ender chest, contains their username and {@link PlayerData}.
          */
         OPEN_ENDER_CHEST,
 
         /**
-         * Sent by both the proxy and bukkit servers to confirm cross-server communication has been established
+         * Sent by both the proxy and bukkit servers to confirm cross-server communication has been established.
          */
         CONNECTION_HANDSHAKE,
 
         /**
-         * Sent by both the proxy and bukkit servers to terminate communications (if a bukkit / the proxy goes offline)
+         * Sent by both the proxy and bukkit servers to terminate communications (if a bukkit / the proxy goes offline).
          */
         TERMINATE_HANDSHAKE,
 
         /**
-         * Sent by a proxy to a bukkit server to decode MPDB data
+         * Sent by a proxy to a bukkit server to decode MPDB data.
          */
         DECODE_MPDB_DATA,
 
         /**
-         * Sent by a bukkit server back to the proxy with the correctly decoded MPDB data
+         * Sent by a bukkit server back to the proxy with the correctly decoded MPDB data.
          */
         DECODED_MPDB_DATA_SET,
 
         /**
-         * Sent by the proxy to a bukkit server to initiate a reload
+         * Sent by the proxy to a bukkit server to initiate a reload.
          */
         RELOAD_CONFIG
     }
@@ -171,8 +171,7 @@ public class RedisMessage {
     }
 
     /**
-     * A record that defines the target of a plugin message; a spigot server or the proxy server(s).
-     * For Bukkit servers, the name of the server must also be specified
+     * A record that defines the target of a plugin message; a spigot server or the proxy server(s). For Bukkit servers, the name of the server must also be specified
      */
     public record MessageTarget(Settings.ServerType targetServerType, UUID targetPlayerUUID, String targetClusterId) implements Serializable { }