diff --git a/docs/configuration.rst b/docs/configuration.rst
index f6899e9f..28275226 100644
--- a/docs/configuration.rst
+++ b/docs/configuration.rst
@@ -120,8 +120,12 @@ Properties
           - ``db_connection`` — the database connetion string
           - ``create_tables`` — boolean, if true, create tables on startup
 
-      - ``max_content_length`` — the maximum size of the request body in bytes that the server can support
+      - ``max_content_length`` — the maximum size of the request body in bytes that the server can support. Required field
       - ``allow_custom_properties`` — boolean, if true, allow custom stix2 properties when posting objects (default: true)
+      - ``public_discovery`` - boolean, if true, do not require authentication for discovery of api roots (default: false)
+      - ``title`` - title of the server, returned as part of the discovery of api roots. Required field
+      - ``contact`` - contact for the server, returned as part of the discovery of api roots
+      - ``description`` - description of the server, returned as part of the discovery of api roots
 
     - ``logging`` — logging configuration.
 
diff --git a/opentaxii/server.py b/opentaxii/server.py
index 928ae033..01b4bbc4 100644
--- a/opentaxii/server.py
+++ b/opentaxii/server.py
@@ -476,7 +476,7 @@ def handle_request(self, endpoint: Callable[[], Response]):
 
     @register_handler(r"^/taxii2/$", handles_own_auth=True)
     def discovery_handler(self):
-        if context.account is None and not self.config["public_discovery"]:
+        if context.account is None and not self.config.get("public_discovery", False):
             raise Unauthorized()
         response = {
             "title": self.config["title"],