diff --git a/3modules/opentracker.nix b/3modules/opentracker.nix
new file mode 100644
index 0000000..8847fc0
--- /dev/null
+++ b/3modules/opentracker.nix
@@ -0,0 +1,55 @@
+{ config, lib, pkgs, ... }:
+
+with config.krebs.lib;
+let
+  cfg = config.makefu.opentracker;
+
+  out = {
+    options.makefu.opentracker = api;
+    config = lib.mkIf cfg.enable imp;
+  };
+
+  api = {
+    enable = mkEnableOption "opentracker";
+
+    package = mkOption {
+      type = types.package;
+      default = pkgs.opentracker;
+    };
+
+    args = mkOption {
+      type = types.string;
+      description = ''
+        see https://erdgeist.org/arts/software/opentracker/ for all params
+      '';
+      default = "";
+    };
+
+    user = mkOption {
+      description = ''
+        user which will run opentracker. by default opentracker drops all
+        privileges and runs in chroot after starting up as root.
+      '';
+      type = types.str;
+      default = "root";
+    };
+  };
+
+  imp = {
+    systemd.services.opentracker = {
+      description = "opentracker server";
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+      restartIfChanged = true;
+      serviceConfig = {
+        Type = "simple";
+        ExecStart = "${cfg.package}/bin/opentracker ${cfg.args}";
+        PrivateTmp = true;
+        WorkingDirectory = "/tmp";
+        User = "${cfg.user}";
+      };
+    };
+  };
+in
+out
+