diff --git a/README.md b/README.md
new file mode 100644
index 0000000000000000000000000000000000000000..f3a94ee50101c62e738b18c00d4810c74f9c7157
--- /dev/null
+++ b/README.md
@@ -0,0 +1,10 @@
+OAuth2 Proxy for Single-Sign-On with Nginx
+==========================================
+
+This application implements a generic OAuth2 client for easy integration of
+NGINX into an OAuth2-based Single-Sign-On system. It is bound to a single
+OAuth2 server (urls defined in config) and -- apart from a session cookie --
+stateless. OAuth2 client id, secret and redirect URI are passed from the
+integrating NGINX to the proxy in HTTP headers.
+
+See testapp for an example setup.