diff --git a/src/main/java/com/ghostchu/peerbanhelper/module/impl/rule/ExpressionRule.java b/src/main/java/com/ghostchu/peerbanhelper/module/impl/rule/ExpressionRule.java
index 081b549e4..ec0cabfb2 100644
--- a/src/main/java/com/ghostchu/peerbanhelper/module/impl/rule/ExpressionRule.java
+++ b/src/main/java/com/ghostchu/peerbanhelper/module/impl/rule/ExpressionRule.java
@@ -79,11 +79,20 @@ public void onEnable() {
         }
         javalinWebContainer.javalin()
                 .get("/api/" + getConfigName() + "/scripts", this::listScripts, Role.USER_READ)
+                .get("/api/"+getConfigName()+"/editable", this::editable, Role.USER_READ)
                 .get("/api/" + getConfigName() + "/{scriptId}", this::readScript, Role.USER_READ)
                 .put("/api/" + getConfigName() + "/{scriptId}", this::writeScript, Role.USER_WRITE)
                 .delete("/api/" + getConfigName() + "/{scriptId}", this::deleteScript, Role.USER_WRITE);
     }
 
+    private void editable(Context context) {
+        Map<String, Object> map = new HashMap<>();
+        var editable = isSafeNetworkEnvironment(context);
+        map.put("editable", editable);
+        map.put("reason", editable ? null : tl(locale(context), Lang.EXPRESS_RULE_ENGINE_DISALLOW_UNSAFE_SOURCE_ACCESS, context.ip()));
+        context.json(new StdResp(true, null, map));
+    }
+
     private void deleteScript(Context context) throws IOException {
         if (!isSafeNetworkEnvironment(context)) {
             context.status(HttpStatus.FORBIDDEN);