diff --git a/README.md b/README.md
index 8b7fc5d..17df1a9 100644
--- a/README.md
+++ b/README.md
@@ -122,6 +122,7 @@ Structured data of the list (kept in sync) is in [structured.yaml](structured.ya
 * `curl -s "https://decapi.me/youtube/latest_video?user=NPR"` - title/URL of latest upload from indicated YouTube channel
 * `curl -s "https://decapi.me/twitter/latest?name=NPR"` - last tweet from indicated account
 * `curl -s "https://decapi.me/twitch/uptime?channel=IGN"` - check if indicated twitch channel is online
+* `curl -s "https://httpbin.org/delay/4"` - HTTP request and response Service (e.g. send response after 4 seconds)
 
 ## Monitoring