diff --git a/default.nix b/default.nix
index 0eb205a..f9e996a 100644
--- a/default.nix
+++ b/default.nix
@@ -6,7 +6,16 @@ rec {
   shell = pkgs.mkShell {
     packages = [
       python
+      pkgs.ruff
     ];
   };
-  python = pkgs.python3.withPackages (ps: [ ps.click ps.click-log ps.uptime-kuma-api ]);
+  python = pkgs.python3.withPackages (ps: [ ps.mypy ps.click ps.click-log ps.uptime-kuma-api ]);
+  evalModules = (pkgs.lib.evalModules {
+    modules = [
+      ./nixos/module.nix
+      ({ lib, ... }: {
+        _module.args.pkgs = lib.mkDefault pkgs;
+      })
+    ];
+  }).extendModules;
 }
diff --git a/nixos/module.nix b/nixos/module.nix
new file mode 100644
index 0000000..144d248
--- /dev/null
+++ b/nixos/module.nix
@@ -0,0 +1,31 @@
+{ config, lib, pkgs, ... }:
+let
+  probesFormat = pkgs.formats.json {};
+  cfg = config.statelessUptimeKuma;
+in
+{
+  options.statelessUptimeKuma = {
+    build.json = lib.mkOption {
+      internal = true;
+      visible = false;
+      type = lib.types.package;
+    };
+    probesConfig = {
+      monitors = lib.mkOption {
+        inherit (probesFormat) type;
+        default = [];
+      };
+      tags = lib.mkOption {
+        inherit (probesFormat) type;
+        default = [];
+      };
+      notifications = lib.mkOption {
+        inherit (probesFormat) type;
+        default = [];
+      };
+    };
+  };
+  config.statelessUptimeKuma = {
+    build.json = probesFormat.generate "probes.json" cfg.probesConfig;
+  };
+}
diff --git a/tests/testmodule.nix b/tests/testmodule.nix
new file mode 100644
index 0000000..8b1fef0
--- /dev/null
+++ b/tests/testmodule.nix
@@ -0,0 +1,16 @@
+let
+  module = {
+    statelessUptimeKuma.probesConfig = {
+      monitors = [
+        {
+          name = "Nix probe";
+          type = "ping";
+          hostname = "localhost";
+        }
+      ];
+    };
+  };
+in
+((import ../. {}).evalModules {
+  modules = [ module ];
+}).config.statelessUptimeKuma.build.json