diff --git a/README.md b/README.md
index c9c7ea4..a01d849 100644
--- a/README.md
+++ b/README.md
@@ -44,6 +44,8 @@ GET /auth?jid=user@host/resource&domain=example.org&method=POST&transaction_id=W
 
 This will send a request to the given JID. If the user accept, the server will return HTTP code 200, otherwise it will return HTTP code 401.
 
+A demo version can be found at [auth.xmpp.kingpenguin.tk](http://auth.xmpp.kingpenguin.tk) for test purpose only.
+
 
 ## Help
 To get any help, please visit the XMPP conference room at [httpauth@muc.kingpenguin.tk](xmpp:httpauth@muc.kingpenguin.tk?join) with your prefered client, or [with your browser](https://jappix.kingpenguin.tk/?r=httpauth@muc.kingpenguin.tk).