> ## Documentation Index
> Fetch the complete documentation index at: https://docs.replyke.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Mark Notification as Read

> Mark a single notification as read by its ID

Marks a specific notification as read. The notification must belong to the authenticated user — users cannot mark another user's notifications as read.

<Note>
  This endpoint requires an authenticated user. Include a valid `Authorization: Bearer <accessToken>` header.
</Note>

## Path Parameters

<ParamField path="notificationId" type="string" required>
  The UUID of the notification to mark as read.
</ParamField>

## Response

Returns HTTP `200` on success with no response body.

## Error Responses

<AccordionGroup>
  <Accordion title="Notification Not Found — 404">
    ```json theme={null}
    {
      "error": "Notification not found",
      "code": "app-notification/not-found"
    }
    ```

    Returned when the notification does not exist or does not belong to the authenticated user.
  </Accordion>

  <Accordion title="Invalid Params — 400">
    ```json theme={null}
    {
      "error": "...",
      "code": "app-notification/invalid-params"
    }
    ```

    Returned when `notificationId` is not a valid UUID.
  </Accordion>

  <Accordion title="Unauthorized — 401">
    ```json theme={null}
    {
      "error": "Unauthorized",
      "code": "auth/unauthorized"
    }
    ```
  </Accordion>
</AccordionGroup>

## See Also

* [Mark All Notifications as Read](/api-reference/app-notifications/mark-all-as-read)
* [`useAppNotifications` hook](/hooks/app-notifications/use-app-notifications)