diff --git a/docs/API.md b/docs/API.md
index dc1128d5f..9e79ed2de 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -260,4 +260,75 @@ Returns `204 No Content` on success.
 
 ### Cards
 
-Cards represent tasks or items of work on a board
+Cards are tasks or items of work on a board
+
+### Columns
+
+Columns represent stages in a workflow on a board. Cards move through columns as they progress.
+
+### Users
+
+Users represent people who have access to an account.
+
+### Notifications
+
+Notifications inform users about events that happened in the account, such as comments, assignments, and card updates.
+
+#### `GET /:account_slug/notifications`
+
+Returns a list of notifications for the current user. Unread notifications are returned first, followed by read notifications.
+
+__Response:__
+
+```json
+[
+  {
+    "id": "03f5va03bpuvkcjemcxl73ho2",
+    "read": false,
+    "read_at": null,
+    "created_at": "2025-11-19T04:03:58.000Z",
+    "title": "Plain text mentions",
+    "body": "Assigned to self",
+    "creator": {
+      "id": "03f5v9zjw7pz8717a4no1h8a7",
+      "name": "David Heinemeier Hansson",
+      "role": "owner",
+      "active": true,
+      "email_address": "david@example.com",
+      "created_at": "2025-12-05T19:36:35.401Z",
+      "url": "http://fizzy.localhost:3006/897362094/users/03f5v9zjw7pz8717a4no1h8a7"
+    },
+    "card": {
+      "id": "03f5v9zo9qlcwwpyc0ascnikz",
+      "title": "Plain text mentions",
+      "status": "published",
+      "url": "http://fizzy.localhost:3006/897362094/cards/3"
+    },
+    "url": "http://fizzy.localhost:3006/897362094/notifications/03f5va03bpuvkcjemcxl73ho2"
+  }
+]
+```
+
+#### `POST /:account_slug/notifications/:notification_id/reading`
+
+Marks a notification as read.
+
+__Response:__
+
+Returns `204 No Content` on success.
+
+#### `DELETE /:account_slug/notifications/:notification_id/reading`
+
+Marks a notification as unread.
+
+__Response:__
+
+Returns `204 No Content` on success.
+
+#### `POST /:account_slug/notifications/bulk_reading`
+
+Marks all unread notifications as read.
+
+__Response:__
+
+Returns `204 No Content` on success.