diff --git a/pkgs/development/python-modules/rtmapi/default.nix b/pkgs/development/python-modules/rtmapi/default.nix
new file mode 100644
index 000000000000..17bc6465fadd
--- /dev/null
+++ b/pkgs/development/python-modules/rtmapi/default.nix
@@ -0,0 +1,45 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchFromBitbucket,
+  setuptools,
+  httplib2,
+}:
+
+buildPythonPackage rec {
+  pname = "rtmapi";
+  version = "0.7.2";
+  pyproject = true;
+
+  src = fetchFromBitbucket {
+    owner = "rtmapi";
+    repo = "rtmapi";
+    rev = "release-${version}";
+    hash = "sha256-+aJ7T5bE+N9bINf6S3v48wUGXQ/ikz1Xb15xWbConT4=";
+  };
+
+  build-system = [
+    setuptools
+  ];
+
+  dependencies = [
+    httplib2
+  ];
+
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace-fail "use_2to3=True," ""
+  '';
+
+  # package has no tests
+  doCheck = false;
+
+  pythonImportsCheck = [ "rtmapi" ];
+
+  meta = {
+    description = "API package for rememberthemilk.com";
+    homepage = "https://bitbucket.org/rtmapi/rtmapi";
+    license = lib.licenses.mit;
+    maintainers = [ lib.maintainers.jamiemagee ];
+  };
+}
diff --git a/pkgs/servers/home-assistant/component-packages.nix b/pkgs/servers/home-assistant/component-packages.nix
index 035637691d65..c32e542c7e50 100644
--- a/pkgs/servers/home-assistant/component-packages.nix
+++ b/pkgs/servers/home-assistant/component-packages.nix
@@ -4911,7 +4911,8 @@
     "remember_the_milk" =
       ps: with ps; [
         httplib2
-      ]; # missing inputs: RtmAPI
+        rtmapi
+      ];
     "remote" =
       ps: with ps; [
       ];
@@ -7560,6 +7561,7 @@
     "reddit"
     "refoss"
     "rehlko"
+    "remember_the_milk"
     "remote"
     "remote_calendar"
     "renault"
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index ea6c79dd65fe..fd3bdbff8f8a 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -15985,6 +15985,8 @@ self: super: with self; {
 
   rtfunicode = callPackage ../development/python-modules/rtfunicode { };
 
+  rtmapi = callPackage ../development/python-modules/rtmapi { };
+
   rtmidi-python = callPackage ../development/python-modules/rtmidi-python { };
 
   rtmixer = callPackage ../development/python-modules/rtmixer { };