diff --git a/src/dune b/src/dune
index 5a5fed2d..5961ab2a 100644
--- a/src/dune
+++ b/src/dune
@@ -11,6 +11,7 @@
   mte_terms
   mte_info
   mte_management
+  mte_handler
   secmod_eddsa
   secmod_rsa
   keys
diff --git a/src/mte.ml b/src/mte.ml
index 66f9f595..7398b1b2 100644
--- a/src/mte.ml
+++ b/src/mte.ml
@@ -97,8 +97,9 @@ let () =
   Caqti_miou.Switch.run @@ fun sw ->
   (* -- *)
   let fs = Fat.create storage in
-  let env = Global.{ sw; stack; tcp; dns; fs } in
-  let devices = Vifu.Devices.[ Global.db_conn; Global.keys ] in
   let cfg = Vifu.Config.v Config.Exchange.port in
+  let devices = Vifu.Devices.[ Global.db_conn; Global.keys ] in
+  let handlers = [ Mte_handler.not_implemented_route ] in
+  let env = Global.{ sw; stack; tcp; dns; fs } in
   Logs.info (fun m -> m "Starting MTE server");
-  Vifu.run ~cfg ~devices tcp routes env
+  Vifu.run ~cfg ~devices ~handlers tcp routes env
diff --git a/src/mte_handler.ml b/src/mte_handler.ml
new file mode 100644
index 00000000..4fc61261
--- /dev/null
+++ b/src/mte_handler.ml
@@ -0,0 +1,28 @@
+let not_implemented_route : (string, Global.env) Vifu.Handler.t =
+  let uri_prefix_list =
+    [
+      "auditors";
+      "reserves";
+      "coins";
+      "transfers";
+      "deposits";
+      "purses";
+      "contracts";
+      "wads";
+      "kyc";
+      "aml";
+      "reserves-attest";
+    ]
+  in
+  let uri_prefix_list =
+    uri_prefix_list
+    |> List.map (fun prefix ->
+        let open Vifu.Uri in
+        rel / prefix /% option rest /?? any)
+  in
+  fun req _v _server (_env : Global.env) ->
+    let target = Vifu.Request.target req in
+    Logs.debug (fun m -> m "not_implemented_route_handler `%s`" target);
+    uri_prefix_list
+    |> List.find_opt (fun uri -> Vifu.Uri.execp uri target)
+    |> Option.map (fun _uri -> Respond.not_implemented req)
diff --git a/src/respond.ml b/src/respond.ml
index 6ac59bd9..ad0e0ec7 100644
--- a/src/respond.ml
+++ b/src/respond.ml
@@ -56,6 +56,11 @@ let error req err =
   Logs.err (fun m -> m "%s: %s" (status_to_string status) hint);
   respond_json req Api.ErrorDetail.jsont status body
 
+let not_implemented req =
+  Logs.debug (fun m -> m "Not implemented");
+  let body = error_detail "Not Implemented" in
+  respond_json req Api.ErrorDetail.jsont `Not_implemented body
+
 let result req jsont res =
   match res with Error e -> error req e | Ok body -> ok req jsont body