# Node Catalogs

Node Catalogs organize nodes into logical groups based on their source, functionality, or integration. They help users quickly find and use the appropriate nodes when building streams in the Stream Designer Studio (SDS).

You can access Node Catalogs from the left sidebar by clicking **Nodes**.

### Catalog Structure

The Node Catalog is organized into:

* **Catalog Provider** – The source of the nodes (for example, helmut.cloud or Cosmo Catalog)
* **Categories** – Functional groupings within a catalog
* **Nodes** – Individual components that perform specific actions

This structure helps organize nodes in a clear and scalable way.

### Using Nodes from a Catalog

To use a node from a catalog:

1. Open the **Nodes** panel in the left sidebar.
2. Expand the desired catalog (for example, helmut.cloud or Cosmo Catalog).
3. Expand a category.
4. Drag the node onto the canvas.

Once added, the node can be configured and connected to other nodes.


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