diff --git a/README.md b/README.md
index 72665d2..4886daf 100644
--- a/README.md
+++ b/README.md
@@ -12,13 +12,10 @@ Requirements
 
 
 
-Documentation
-=============
-
 The POST request
-----------------
+================
 
-Our API sends a simple POST request with an `application/x-www-form-urlencoded` payload. The payload contains the following parameters:
+sipgate.io sends a simple POST request with an `application/x-www-form-urlencoded` payload. The request contains the following parameters:
 
 Parameter | Description
 --------- | -----------
@@ -33,6 +30,46 @@ You can simulate this POST request and test your server with a simple cURL comma
 curl -X POST --data "from=492111234567&to=4915791234567" http://localhost:3000
 ```
 
+The XML response
+============
+After sending the POST request sipgate.io will accept an XML response to determine what to do. Make sure to set ```application/xml``` in the ```Content-Type``` header of your response and you are ready to go!
+
+sipgate.io currently supports the following responses:
+
+Action            | Description
+----------------- | -----------
+[Reject](#reject) | Reject call or pretend to be busy
+
+Reject
+------
+
+Pretend to be busy or block unwanted calls. 
+
+Possible attributes | Possible values | Default value
+------------------- | --------------- | -------------
+reason              | rejected, busy  | rejected
+
+
+**Example 1: Reject call**
+```xml
+<?xml version="1.0" encoding="UTF-8"?>
+<Response>
+        <Reject />
+</Response>
+```
+
+**Example 2: Reject call signaling busy**
+```xml
+<?xml version="1.0" encoding="UTF-8"?>
+<Response>
+        <Reject reason="busy" />
+</Response>
+```
+
+More to come
+------------
+Stay tuned...
+
 
 
 Server Examples
@@ -61,7 +98,7 @@ Troubleshooting
 sipgate.io Log
 --------------
 
-You can enable logging within your account for debugging purposes. You will find each request and the corresponding response in the logging table.
+You can enable logging for debugging purposes from your simquadrat dashboard. You will find each request and the corresponding response in the logging table.
 
 How do I inspect network traffic?
 ---------------------------------
@@ -79,16 +116,16 @@ A word about security
 HTTP vs. HTTPS
 --------------
 
-We strongly encourage you to use a HTTPS server. Although we support plain HTTP connections we do not recommend pushing sensitive call details over unencrypted connections. By default, the API does not accept [self-signed certificates](http://stackoverflow.com/a/10176685), but you can enable them in the dashboard.
+We strongly encourage you to use a HTTPS server. Although we support plain HTTP connections we do not recommend pushing sensitive call details over unencrypted connections. By default sipgate.io does not accept [self-signed certificates](http://stackoverflow.com/a/10176685), but you can allow them in the simquadrat dashboard.
 
 Authentication
 --------------
 
-The API supports HTTP Basic Authentication. You can include your username and password within the URL (e.g. `https://username:password@example.com:8080`).
+sipgate.io supports HTTP Basic Authentication. You can include your username and password within the URL (e.g. `https://username:password@example.com:8080`).
 
 
 
 Help us make it better
 ======================
 
-Please tell us how we can make the API better. If you have a specific feature request or if you found a bug or would like to add an example, please use [GitHub Issues](https://github.com/sipgate/sipgate.io/issues) or fork these docs and send a [pull request](https://github.com/sipgate/sipgate.io/pulls) with your improvements.
+Please tell us how we can improve sipgate.io. If you have a specific feature request, found a bug or would like to add an example, please use [GitHub Issues](https://github.com/sipgate/sipgate.io/issues) or fork these docs and send a [pull request](https://github.com/sipgate/sipgate.io/pulls) with your improvements.