diff --git a/pkgs/development/python-modules/xcaplib/default.nix b/pkgs/development/python-modules/xcaplib/default.nix
new file mode 100644
index 000000000000..d046f8500bd8
--- /dev/null
+++ b/pkgs/development/python-modules/xcaplib/default.nix
@@ -0,0 +1,50 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchFromGitHub,
+  setuptools,
+  lxml,
+  twisted,
+  python3-application,
+  unstableGitUpdater,
+}:
+
+buildPythonPackage rec {
+  pname = "xcaplib";
+  # latest commit is needed for python 3.13 compat.
+  version = "2.0.1-unstable-2025-03-20";
+  pyproject = true;
+
+  src = fetchFromGitHub {
+    owner = "AGProjects";
+    repo = "python3-xcaplib";
+    rev = "925846f2520d823f0b83279ceca6202808a4ca4f";
+    hash = "sha256-8EtXwHMQcPzPfP8JpB6gTV7PADHz+bJIJMhvR3DkPkk=";
+  };
+
+  build-system = [
+    setuptools
+  ];
+
+  dependencies = [
+    lxml
+    twisted
+    python3-application
+  ];
+
+  # the one and only upstream test relies on networking
+  doCheck = false;
+
+  pythonImportsCheck = [ "xcaplib" ];
+
+  passthru.updateScript = unstableGitUpdater { };
+
+  meta = {
+    description = "XCAP (RFC4825) client library";
+    homepage = "https://github.com/AGProjects/python3-xcaplib";
+    license = lib.licenses.lgpl21Plus;
+    teams = [ lib.teams.ngi ];
+    maintainers = [ lib.maintainers.ethancedwards8 ];
+    mainProgram = "xcapclient3";
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 6f39e1ede054..44053e4db9bb 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -19808,6 +19808,8 @@ self: super: with self; {
 
   xboxapi = callPackage ../development/python-modules/xboxapi { };
 
+  xcaplib = callPackage ../development/python-modules/xcaplib { };
+
   xcffib = callPackage ../development/python-modules/xcffib { };
 
   xdg = callPackage ../development/python-modules/xdg { };