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+---
+summary: 'XEP-0502 (MUC Activity Indicator) implementation'
+...
+
+This module provides an implementation of [XEP-0502 (MUC Activity Indicator)](https://xmpp.org/extensions/xep-0502.html) for Prosody.
+
+To enable it, load it on a MUC host, for example:
+
+```lua
+Component "chat.domain.example" "muc"
+    modules_enabled = { "muc_activity" }
+```
+
+When this module is loaded, it will expose the average number of messages per hour for all public MUCs.
+The number is calculated over a 24 hour window.
+
+Note that this module may impact server performance on servers with many MUCs.