diff --git a/api/Document.json b/api/Document.json
index b27fe5e2d0aa45..274e6665a6e56a 100644
--- a/api/Document.json
+++ b/api/Document.json
@@ -6136,7 +6136,8 @@
           "spec_url": "https://privacycg.github.io/requestStorageAccessFor/#dom-document-requeststorageaccessfor",
           "support": {
             "chrome": {
-              "version_added": "119"
+              "version_added": "119",
+              "notes": "Requires the calling top-level page and the embedded document (that the storage access is being requested for) to be part of the same <a href='https://developer.mozilla.org/docs/Web/API/Storage_Access_API/Related_website_sets'>related website set</a>."
             },
             "chrome_android": "mirror",
             "edge": "mirror",
diff --git a/api/Permissions.json b/api/Permissions.json
index a85e2d0fd492e2..6826f550f2d5b9 100644
--- a/api/Permissions.json
+++ b/api/Permissions.json
@@ -706,6 +706,44 @@
           }
         }
       },
+      "permission_top-level-storage-access": {
+        "__compat": {
+          "description": "<code>top-level-storage-access</code> permission",
+          "spec_url": "https://privacycg.github.io/requestStorageAccessFor/#permissions-integration",
+          "support": {
+            "chrome": {
+              "version_added": "119"
+            },
+            "chrome_android": {
+              "version_added": "120"
+            },
+            "edge": "mirror",
+            "firefox": {
+              "version_added": false
+            },
+            "firefox_android": "mirror",
+            "ie": {
+              "version_added": false
+            },
+            "oculus": "mirror",
+            "opera": "mirror",
+            "opera_android": "mirror",
+            "safari": {
+              "version_added": false
+            },
+            "safari_ios": "mirror",
+            "samsunginternet_android": "mirror",
+            "webview_android": {
+              "version_added": false
+            }
+          },
+          "status": {
+            "experimental": true,
+            "standard_track": true,
+            "deprecated": false
+          }
+        }
+      },
       "permission_window-management": {
         "__compat": {
           "description": "<code>window-management</code> permission",