diff --git a/.changes/api-transparent-window.md b/.changes/api-transparent-window.md
new file mode 100644
index 00000000000..496af1ca0c5
--- /dev/null
+++ b/.changes/api-transparent-window.md
@@ -0,0 +1,5 @@
+---
+"api": patch
+---
+
+Adds `transparent?: boolean` to the `WindowOptions` interface.
diff --git a/tooling/api/src/window.ts b/tooling/api/src/window.ts
index d5273bd90cf..14a1506ec8a 100644
--- a/tooling/api/src/window.ts
+++ b/tooling/api/src/window.ts
@@ -687,6 +687,8 @@ export interface WindowOptions {
   title?: string
   /** Whether the window is in fullscreen mode or not. */
   fullscreen?: boolean
+  /** Whether the window is transparent or not. */
+  transparent?: boolean
   /** Whether the window should be maximized upon creation or not. */
   maximized?: boolean
   /** Whether the window should be immediately visible upon creation or not. */