diff --git a/Dalamud/Plugin/DalamudPluginInterface.cs b/Dalamud/Plugin/DalamudPluginInterface.cs
index 5a2ff0421..05097b832 100644
--- a/Dalamud/Plugin/DalamudPluginInterface.cs
+++ b/Dalamud/Plugin/DalamudPluginInterface.cs
@@ -226,6 +226,7 @@ namespace Dalamud.Plugin
         /// Subscribe to an IPC message by any plugin.
         /// </summary>
         /// <param name="action">The action to take when a message was received.</param>
+        [Obsolete("The current IPC mechanism is obsolete and scheduled to be replaced after API level 3.")]
         public void SubscribeAny(Action<string, ExpandoObject> action)
         {
             if (this.AnyPluginIpcAction != null)
@@ -239,6 +240,7 @@ namespace Dalamud.Plugin
         /// </summary>
         /// <param name="pluginName">The InternalName of the plugin to subscribe to.</param>
         /// <param name="action">The action to take when a message was received.</param>
+        [Obsolete("The current IPC mechanism is obsolete and scheduled to be replaced after API level 3.")]
         public void Subscribe(string pluginName, Action<ExpandoObject> action)
         {
             if (this.dalamud.PluginManager.IpcSubscriptions.Any(x => x.SourcePluginName == this.pluginName && x.SubPluginName == pluginName))
@@ -250,6 +252,7 @@ namespace Dalamud.Plugin
         /// <summary>
         /// Unsubscribe from messages from any plugin.
         /// </summary>
+        [Obsolete("The current IPC mechanism is obsolete and scheduled to be replaced after API level 3.")]
         public void UnsubscribeAny()
         {
             if (this.AnyPluginIpcAction == null)
@@ -262,6 +265,7 @@ namespace Dalamud.Plugin
         /// Unsubscribe from messages from a plugin.
         /// </summary>
         /// <param name="pluginName">The InternalName of the plugin to unsubscribe from.</param>
+        [Obsolete("The current IPC mechanism is obsolete and scheduled to be replaced after API level 3.")]
         public void Unsubscribe(string pluginName)
         {
             var sub = this.dalamud.PluginManager.IpcSubscriptions.FirstOrDefault(x => x.SourcePluginName == this.pluginName && x.SubPluginName == pluginName);
@@ -275,6 +279,7 @@ namespace Dalamud.Plugin
         /// Send a message to all subscribed plugins.
         /// </summary>
         /// <param name="message">The message to send.</param>
+        [Obsolete("The current IPC mechanism is obsolete and scheduled to be replaced after API level 3.")]
         public void SendMessage(ExpandoObject message)
         {
             var subs = this.dalamud.PluginManager.IpcSubscriptions.Where(x => x.SubPluginName == this.pluginName);
@@ -290,6 +295,7 @@ namespace Dalamud.Plugin
         /// <param name="pluginName">The InternalName of the plugin to send the message to.</param>
         /// <param name="message">The message to send.</param>
         /// <returns>True if the corresponding plugin was present and received the message.</returns>
+        [Obsolete("The current IPC mechanism is obsolete and scheduled to be replaced after API level 3.")]
         public bool SendMessage(string pluginName, ExpandoObject message)
         {
             var (_, _, pluginInterface, _) = this.dalamud.PluginManager.Plugins.FirstOrDefault(x => x.Definition.InternalName == pluginName);