add nixos mcp server

flake.lock

@@ -5199,11 +5199,11 @@
         "stylix": "stylix_6"
       },
       "locked": {
-        "lastModified": 1778016348,
+        "lastModified": 1779122512,
-        "narHash": "sha256-C8PtC95r1KJync8qDEroIont1VT8tiwsjonYjwGLhbY=",
+        "narHash": "sha256-fMhsa8ms/0mR6wmuc+Eoe3Lj31pFO1hcfiZvvCOFC2I=",
         "ref": "release-25.11",
-        "rev": "8ad8b1f633f6c3875032a0ead0e87255dff4ab3c",
+        "rev": "896743958561cb191f4e4d738d823008126cf175",
-        "revCount": 57,
+        "revCount": 83,
         "type": "git",
         "url": "https://git.sid.ovh/sid/synix.git"
       },

hosts/rx4/services/open-webui-oci.nix

@@ -2,12 +2,19 @@
   inputs,
   constants,
   config,
+  lib,
   pkgs,
   ...
 }:
 
+let
+  inherit (lib) getExe;
+in
 {
-  imports = [ inputs.synix.nixosModules.open-webui-oci ];
+  imports = [
+    inputs.synix.nixosModules.open-webui-oci
+    inputs.synix.nixosModules.mcpo
+  ];
 
   services.open-webui-oci = {
     enable = true;
@@ -21,6 +28,28 @@
     };
   };
 
+  services.mcpo = {
+    enable = true;
+    package = pkgs.synix.mcpo;
+    port = 8765;
+    settings = {
+      mcpServers = {
+        # fetcher-mcp = {
+        #   command = getExe pkgs.synix.fetcher-mcp;
+        #   url = "http://127.0.0.1:8001/fetcher-mcp";
+        # };
+        nixos = {
+          command = getExe pkgs.nix;
+          args = [
+            "run"
+            "github:utensils/mcp-nixos"
+            "--"
+          ];
+        };
+      };
+    };
+  };
+
   # sops = {
   #   secrets."open-webui-oci/stt-api-key" = { };
   #   secrets."open-webui-oci/tts-api-key" = { };