diff --git a/docs/api-reference/dependencies.md b/docs/api-reference/dependencies.md
index 72541875f7..c6062c6954 100644
--- a/docs/api-reference/dependencies.md
+++ b/docs/api-reference/dependencies.md
@@ -4,11 +4,24 @@
     handler: python
     options:
       members:
+        - get_cudf
+        - get_modin
         - get_pandas
         - get_polars
-        - get_modin
-        - get_cudf
         - get_pyarrow
+        - is_cudf_dataframe
+        - is_cudf_series
+        - is_dask_dataframe
+        - is_modin_dataframe
+        - is_modin_series
+        - is_numpy_array
+        - is_pandas_dataframe
         - is_pandas_dataframe
+        - is_pandas_series
+        - is_polars_dataframe
+        - is_polars_lazyframe
+        - is_polars_series
+        - is_pyarrow_chunked_array
+        - is_pyarrow_table
       show_source: false
       show_bases: false
diff --git a/narwhals/dependencies.py b/narwhals/dependencies.py
index e2d67f03ca..7ed2f021dd 100644
--- a/narwhals/dependencies.py
+++ b/narwhals/dependencies.py
@@ -142,4 +142,16 @@ def is_numpy_array(arr: Any) -> TypeGuard[np.ndarray]:
     "get_pyarrow",
     "get_numpy",
     "is_pandas_dataframe",
+    "is_pandas_series",
+    "is_polars_dataframe",
+    "is_polars_lazyframe",
+    "is_polars_series",
+    "is_modin_dataframe",
+    "is_modin_series",
+    "is_cudf_dataframe",
+    "is_cudf_series",
+    "is_pyarrow_table",
+    "is_pyarrow_chunked_array",
+    "is_numpy_array",
+    "is_dask_dataframe",
 ]