> For the complete documentation index, see [llms.txt](https://docs.nuvolos.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.nuvolos.com/reference/applications/add-ons/opensearch-add-on.md).

# OpenSearch add-on

This add-on provides an OpenSearch 2.4.1 database service running on `localhost`, port 9200.

The default index can be accessed with the username/password `admin/admin`.

The database indices are stored in the application storage area, if you delete the application, all indices will be lost.

{% hint style="info" %}
If you add an OpenSearch add-on to your application, your application will start in shared mode.
{% endhint %}