diff --git a/README.md b/README.md
index 4e60884..3f286d9 100644
--- a/README.md
+++ b/README.md
@@ -5,14 +5,14 @@ JPushover
 
 A simple, minimal (18 KB), zero-dependency convenient class for sending messages to [Pushover][1] in Java.
 
-Supports [Messages API][3] and [Glances API][4], synchronous and asynchronous sending.
+Supports [Messages API][3], [Glances API][4] and [OpenClient API][5]. Send synchronous or asynchronous.
 
 Requires Java 11.
 
 Usage
 ------------------
 
-1) Add the jpushover dependency to your pom.xml:
+Add the jpushover dependency to your pom.xml:
 
 ```
 <dependency>
@@ -22,20 +22,16 @@ Usage
 </dependency>
 ```
 
-2) Use the JPushover object with the required informations were you want
+Use the JPushover object with the required informations were you want
+
+**Message API**
 
 ```
-JPushover.newMessage()
+JPushover.messageAPI()
 	.withToken("MyToken")
 	.withUser("MyUser")
 	.withMessage("MyMessage")
 	.push();
-
-JPushover.newGlance()
-	.withToken("MyToken")
-	.withUser("MyUser")
-	.withText("MyText")
-	.push();		
 ```
 
 When using the Message API you can additionally add available options from the official [Pushover documentation][2]	
@@ -47,7 +43,8 @@ boolean valid = JPushover.newMessage()
 	.withToken("MyToken")
 	.withUser("MyUser")
 	.validate();
-```		
+```	
+
 
 If you want more information and/or the response from the Pushover API, use the PushoverResponse object.
 
@@ -63,6 +60,7 @@ The PushoverResponse will return the raw HTTP status code, along with the raw JS
 
 Sending a Message or Glance asynchronous is simple. Just call the pushAsync() method instead of push(). Examples:
 
+
 ```
 JPushover.newMessage()
 	.withToken("MyToken")
@@ -79,12 +77,98 @@ JPushover.newGlance()
 
 If you are using pushAsync remember to shutdown the ExecutorService that is handling the tasks by calling:
 
-
 ```
 AsyncService.getInstance().shutdown();	
 ```
 
+**Glance API**
+
+```
+JPushover.glanceAPI()
+	.withToken("MyToken")
+	.withUser("MyUser")
+	.withText("MyText")
+	.push();		
+```
+
+**OpenClient API**
+
+Using the OpenClient API is a little bit more complex than Message API or Glance API.
+
+```
+//Prequisites - You require a message listener that listens for incoming messages
+
+import de.svenkubiak.jpushover.listener.MessageListener;
+
+public class MyMessageListener implements MessageListener {
+
+    @Override
+    public void onMessage() {
+        // TODO Auto-generated method stub
+    }
+
+    @Override
+    public void onError() {
+        // TODO Auto-generated method stub   
+    }
+}
+
+
+//1 - Login (required once!)
+PushoverResponse pushoverResponse = JPushover
+	.openClientAPI()
+	.login("YourUsername", "YourPassword");
+
+//1 - Login with Two-Factor authentication enabled (required once!)
+PushoverResponse pushoverResponse = JPushover
+	.openClientAPI()
+	.login("YourUsername", "YourPassword", "123456");
+
+//2 - Parse secret from JSON response and store it
+String secret = MyJsonParser(pushoverResponse.getResponse());
+
+//3 - Register a new device (required once)
+PushoverResponse pushoverResponse = JPushover
+	.openClientAPI()
+	.registerDevice(secret, "YourDeviceName");
+
+//4 - Parse deviceId from JSON response and store it
+String deviceId = MyJsonParser(pushoverResponse.getResponse());
+
+//5 - Create a new class
+String deviceId = MyJsonParser(pushoverResponse.getResponse());
+
+//6 - Open a new WebSocket connection passing an instance of your message listener
+JPushover.openClientAPI().open(secret, deviceId, new MyMessageListener())
+
+```
+
+Once new messages are pushed to your device the onMessage method of your message listener is called. If an error occurs, the onError message of your message listener is called.
+
+If you require to close the WebSocket connection, call the close() method and re-open the connection.
+
+
+```
+//Close connection
+JPushover.openClientAPI().close();
+
+//Re-open
+JPushover.openClientAPI().open(secret, deviceId, new MyMessageListener())
+
+```
+
+
+Changelog
+------------------
+
+6.0.0. - 2021-06-21
+
+* Partial API rewrite (breaks backward compatibility)
+* Added support for Open Client API
+
+
 [1]: https://pushover.net
 [2]: https://pushover.net/api
 [3]: https://pushover.net/api
 [4]: https://pushover.net/api/glances
+[5]: https://pushover.net/api/client
\ No newline at end of file