diff --git a/public/swagger/swagger-register.yaml b/public/swagger/swagger-register.yaml
index 49c5a40..ba07ea1 100644
--- a/public/swagger/swagger-register.yaml
+++ b/public/swagger/swagger-register.yaml
@@ -5,6 +5,7 @@ paths:
     summary: "Register a new namespace"
     parameters:
     - $ref: "#/components/parameters/namespace"
+    - $ref: "#/components/parameters/public"
     requestBody:
       description: "A url-form-encoded password for the namespace"
       content:
@@ -22,6 +23,14 @@ components:
   parameters:
     namespace:
       $ref: "./swagger.yaml#/components/parameters/namespace"
+
+    public:
+      name: public
+      in: query
+      description: "if not empty, then namespace is accessible without auth"
+      schema:
+        type: string
+
   schemas:
     ok:
       $ref: "./swagger.yaml#/components/schemas/ok"