diff --git a/pkgs/development/python-modules/x3dh/default.nix b/pkgs/development/python-modules/x3dh/default.nix
new file mode 100644
index 000000000000..7dccc3edf2bb
--- /dev/null
+++ b/pkgs/development/python-modules/x3dh/default.nix
@@ -0,0 +1,53 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchFromGitHub,
+  setuptools,
+  xeddsa,
+  cryptography,
+  pydantic,
+  typing-extensions,
+  pytestCheckHook,
+  pytest-asyncio,
+}:
+buildPythonPackage rec {
+  pname = "x3dh";
+  version = "1.1.0";
+  pyproject = true;
+
+  src = fetchFromGitHub {
+    owner = "Syndace";
+    repo = "python-x3dh";
+    tag = "v${version}";
+    hash = "sha256-/hC1Kze4yBOlgbWJcGddcYty9fqwZ08Lyi0IiqSDibI=";
+  };
+
+  strictDeps = true;
+
+  build-system = [
+    setuptools
+  ];
+
+  dependencies = [
+    xeddsa
+    cryptography
+    pydantic
+    typing-extensions
+  ];
+
+  nativeCheckInputs = [
+    pytestCheckHook
+    pytest-asyncio
+  ];
+
+  pythonImportsCheck = [ "x3dh" ];
+
+  meta = {
+    description = "Python Implementation of the Extended Triple Diffie-Hellman key Agreement Protocol";
+    homepage = "https://github.com/Syndace/python-x3dh";
+    changelog = "https://github.com/Syndace/python-x3dh/blob/v${version}/CHANGELOG.md";
+    license = lib.licenses.mit;
+    teams = with lib.teams; [ ngi ];
+    maintainers = with lib.maintainers; [ ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 032963a1abe0..be009ea09c82 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -19106,6 +19106,8 @@ self: super: with self; {
 
   x256 = callPackage ../development/python-modules/x256 { };
 
+  x3dh = callPackage ../development/python-modules/x3dh { };
+
   x690 = callPackage ../development/python-modules/x690 { };
 
   xapian = callPackage ../development/python-modules/xapian { inherit (pkgs) xapian; };