diff --git a/backend/src/api/services/services-routes.ts b/backend/src/api/services/services-routes.ts
index 520496249..d149cd629 100644
--- a/backend/src/api/services/services-routes.ts
+++ b/backend/src/api/services/services-routes.ts
@@ -7,6 +7,7 @@ class ServicesRoutes {
   public initRoutes(app: Application): void {
     app
       .get(config.MEMPOOL.API_URL_PREFIX + 'wallet/:walletId', this.$getWallet)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'services/custom/config', this.$getCustomConfig)
     ;
   }
 
@@ -22,6 +23,11 @@ class ServicesRoutes {
       handleError(req, res, 500, 'Failed to get wallet');
     }
   }
+
+  // serve a blank custom config file by default
+  private async $getCustomConfig(req: Request, res: Response): Promise<void> {
+    res.status(200).contentType('application/javascript').send('');
+  }
 }
 
 export default new ServicesRoutes();
diff --git a/frontend/src/index.mempool.html b/frontend/src/index.mempool.html
index ed5f7e0b4..b5ef85feb 100644
--- a/frontend/src/index.mempool.html
+++ b/frontend/src/index.mempool.html
@@ -5,7 +5,7 @@
   <meta charset="utf-8">
   <title>mempool - Bitcoin Explorer</title>
   <script src="/resources/config.js"></script>
-  <script src="/resources/customize.js"></script>
+  <script src="/api/v1/services/custom/config"></script>
   <base href="/">
 
   <meta name="description" content="Explore the full Bitcoin ecosystem with The Mempool Open Source Project®. See the real-time status of your transactions, get network info, and more." />