diff --git a/kumascript/macros/GroupData.json b/kumascript/macros/GroupData.json
index f1010c234b03..423083c54570 100644
--- a/kumascript/macros/GroupData.json
+++ b/kumascript/macros/GroupData.json
@@ -452,6 +452,24 @@
       "properties": [],
       "events": []
     },
+    "File System Access API": {
+      "overview": ["File System Access API"],
+      "guides": [],
+      "interfaces": [
+        "FileSystemHandle",
+        "FileSystemFileHandle",
+        "FileSystemDirectoryHandle",
+        "FileSystemWritableFileStream"
+      ],
+      "methods": [
+        "window.showOpenFilePicker()",
+        "window.showSaveFilePicker()",
+        "window.showDirectoryPicker()",
+        "DataTransferItem.getAsFileSystemHandle()"
+      ],
+      "properties": [],
+      "events": []
+    },
     "File System API": {
       "overview": ["File and Directory Entries API"],
       "guides": [
diff --git a/kumascript/macros/SpecData.json b/kumascript/macros/SpecData.json
index 41afdf72f773..3b9907892b64 100644
--- a/kumascript/macros/SpecData.json
+++ b/kumascript/macros/SpecData.json
@@ -819,6 +819,11 @@
     "url": "https://w3c.github.io/FileAPI/",
     "status": "WD"
   },
+  "File System Access API": {
+    "name": "File System Access API",
+    "url": "https://wicg.github.io/file-system-access/",
+    "status": "WD"
+  },
   "File System API": {
     "name": "File and Directory Entries API",
     "url": "https://wicg.github.io/entries-api/",