diff --git a/public.openapi.json b/public.openapi.json
index b6a0262..764727e 100644
--- a/public.openapi.json
+++ b/public.openapi.json
@@ -392,6 +392,26 @@
         "responses": {
           "200": {
             "$ref": "#/components/responses/HostConfResponse"
+          },
+          "404": {
+            "description": "No enabled domains matched request parameters",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Errors"
+                }
+              }
+            }
+          },
+          "409": {
+            "description": "Multiple active domains matched request parameters",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Errors"
+                }
+              }
+            }
           }
         },
         "security": [
diff --git a/public.openapi.yaml b/public.openapi.yaml
index a9ba3f3..1de4e30 100644
--- a/public.openapi.yaml
+++ b/public.openapi.yaml
@@ -245,6 +245,18 @@ paths:
             responses:
                 '200':
                     $ref: '#/components/responses/HostConfResponse'
+                '404':
+                    description: No enabled domains matched request parameters
+                    content:
+                        application/json:
+                            schema:
+                                $ref: '#/components/schemas/Errors'
+                '409':
+                    description: Multiple active domains matched request parameters
+                    content:
+                        application/json:
+                            schema:
+                                $ref: '#/components/schemas/Errors'
             security:
                 - x-rh-identity:
                       - Type:System:domain