diff --git a/README.md b/README.md
index 32ea894..8ca2bf7 100644
--- a/README.md
+++ b/README.md
@@ -85,3 +85,20 @@ async def hello():
 asyncio.get_event_loop().run_until_complete(hello())
 ```
 
+interface
+---------
+
+- open - opens a file from filesystem
+  filename: string, filename on the filesystem
+  filter: string, optional, filter identificator, if not given then CloudCompare identifies fileformat based on extension
+  silent: bool, optional, if true, then filterdialog is suppressed
+  transformation: list of float (16values), optional, after import this transformation matrix is applied to the object,
+- clear - clear all objects
+
+
+contact
+-------
+
+Remarks, wishes, etc. are welcome
+thAdib theAdib@gmail.com
+