diff --git a/HTTP-request-API.md b/HTTP-request-API.md
index 0d5a602..8f9a88f 100644
--- a/HTTP-request-API.md
+++ b/HTTP-request-API.md
@@ -99,6 +99,7 @@ Parameter | Value Range | Description | Since Version
 &NM= | 0 or 1 | Cronixie Time or Countdown mode | 0.4
 &NB= | 0 or 1 | Cronixie Backlight | 0.4
 &IT | none | Include UI color theme in API response | 0.8.2
+&RD= | 0 or 1 | Toggle realtime UDP | 0.8.4
 
 ## XML response
 This is the XML file sent as response to every API call.