Update README.md

Author: tschellenbach

README.md

@@ -9,6 +9,7 @@
 
 **Quick Links**
 
+* [Stream Chat API](https://getstream.io/chat/)
 * [Register](https://getstream.io/chat/trial/) to get an API key for Stream Chat
 * [React Native Chat Tutorial](https://getstream.io/chat/react-native-chat/tutorial/)
 * [Chat UI Kit](https://getstream.io/chat/ui-kit/)