diff --git a/anki_connect.py b/anki_connect.py
index 3b709d9..48681f2 100644
--- a/anki_connect.py
+++ b/anki_connect.py
@@ -23,6 +23,13 @@ import select
 import socket
 
 
+#
+# Constants
+#
+
+API_VERSION = 1
+
+
 #
 # AjaxRequest
 #
@@ -344,6 +351,10 @@ class AnkiConnect:
         return features
 
 
+    def api_version(self):
+        return API_VERSION
+
+
 #
 #   Entry
 #