diff --git a/pkgs/development/python-modules/pycync/default.nix b/pkgs/development/python-modules/pycync/default.nix
new file mode 100644
index 000000000000..62dcf3c65b36
--- /dev/null
+++ b/pkgs/development/python-modules/pycync/default.nix
@@ -0,0 +1,49 @@
+{
+  aiohttp,
+  buildPythonPackage,
+  fetchFromGitHub,
+  hatchling,
+  lib,
+  pytest-asyncio,
+  pytest-mock,
+  pytestCheckHook,
+}:
+
+buildPythonPackage rec {
+  pname = "pycync";
+  version = "0.4.2";
+  pyproject = true;
+
+  src = fetchFromGitHub {
+    owner = "Kinachi249";
+    repo = "pycync";
+    tag = "v${version}";
+    hash = "sha256-PDCS+ucfO5RRvTshGGjxir3ez7L405k5tL5svMxZMsg=";
+  };
+
+  build-system = [ hatchling ];
+
+  dependencies = [
+    aiohttp
+  ];
+
+  pythonImportsCheck = [ "pycync" ];
+
+  nativeCheckInputs = [
+    pytest-asyncio
+    pytest-mock
+    pytestCheckHook
+  ];
+
+  preCheck = ''
+    cd tests
+  '';
+
+  meta = {
+    changelog = "https://github.com/Kinachi249/pycync/releases/tag/${src.tag}";
+    description = "Python API library for Cync smart devices";
+    homepage = "https://github.com/Kinachi249/pycync";
+    license = lib.licenses.gpl3Plus;
+    maintainers = [ lib.maintainers.dotlambda ];
+  };
+}
diff --git a/pkgs/servers/home-assistant/component-packages.nix b/pkgs/servers/home-assistant/component-packages.nix
index f45e2ac8cbf4..f961ebe21c10 100644
--- a/pkgs/servers/home-assistant/component-packages.nix
+++ b/pkgs/servers/home-assistant/component-packages.nix
@@ -1057,7 +1057,8 @@
       ];
     "cync" =
       ps: with ps; [
-      ]; # missing inputs: pycync
+        pycync
+      ];
     "dacia" =
       ps: with ps; [
       ];
@@ -7138,6 +7139,7 @@
     "cpuspeed"
     "crownstone"
     "cups"
+    "cync"
     "daikin"
     "datadog"
     "date"
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index dea72c2d724b..c84fd69d89c7 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -12828,6 +12828,8 @@ self: super: with self; {
 
   pycycling = callPackage ../development/python-modules/pycycling { };
 
+  pycync = callPackage ../development/python-modules/pycync { };
+
   pycyphal = callPackage ../development/python-modules/pycyphal { };
 
   pydaikin = callPackage ../development/python-modules/pydaikin { };