diff --git a/src/workos/__init__.py b/src/workos/__init__.py
index a6f03134..faa676ad 100644
--- a/src/workos/__init__.py
+++ b/src/workos/__init__.py
@@ -16,7 +16,7 @@
 )
 from ._pagination import AsyncPage, ListMetadata, SyncPage
 from .public_client import create_public_client
-from ._types import RequestOptions
+from ._types import NOT_GIVEN, NotGiven, RequestOptions
 
 __all__ = [
     "WorkOSClient",
@@ -34,5 +34,7 @@
     "AsyncPage",
     "ListMetadata",
     "RequestOptions",
+    "NOT_GIVEN",
+    "NotGiven",
     "create_public_client",
 ]
diff --git a/src/workos/_types.py b/src/workos/_types.py
index 3ae131ec..ece7b179 100644
--- a/src/workos/_types.py
+++ b/src/workos/_types.py
@@ -5,7 +5,7 @@
 import sys
 from datetime import datetime
 from enum import Enum
-from typing import Any, Dict, NoReturn, Protocol, TypedDict, TypeVar
+from typing import Any, Dict, Literal, NoReturn, Protocol, TypedDict, TypeVar
 
 if sys.version_info >= (3, 11):
     from typing import Self
@@ -35,6 +35,24 @@ def enum_value(value: Any) -> Any:
     return value.value if isinstance(value, Enum) else value
 
 
+class NotGiven:
+    """Sentinel used as the default for nullable optional parameters.
+
+    Distinguishes an omitted argument ("leave unchanged", not sent) from an
+    explicit ``None``, which clears the field by sending JSON ``null``.
+    Falsy so ``if not param`` reads naturally.
+    """
+
+    def __bool__(self) -> Literal[False]:
+        return False
+
+    def __repr__(self) -> str:
+        return "NOT_GIVEN"
+
+
+NOT_GIVEN = NotGiven()
+
+
 D = TypeVar("D", bound=Deserializable)
 
 
diff --git a/tests/test_types.py b/tests/test_types.py
new file mode 100644
index 00000000..cf937083
--- /dev/null
+++ b/tests/test_types.py
@@ -0,0 +1,24 @@
+from workos._types import NOT_GIVEN, NotGiven
+
+
+class TestNotGiven:
+    """The NOT_GIVEN sentinel is the default for nullable optional params,
+    letting generated methods tell an omitted argument apart from an explicit
+    None (which clears the field via JSON null)."""
+
+    def test_is_falsy(self):
+        assert not NOT_GIVEN
+        assert bool(NOT_GIVEN) is False
+
+    def test_repr(self):
+        assert repr(NOT_GIVEN) == "NOT_GIVEN"
+
+    def test_is_distinct_from_none(self):
+        assert NOT_GIVEN is not None
+        assert isinstance(NOT_GIVEN, NotGiven)
+
+    def test_exported_from_public_namespace(self):
+        import workos
+
+        assert workos.NOT_GIVEN is NOT_GIVEN
+        assert workos.NotGiven is NotGiven