# Marketplace
URL: /en-US/docs/customize/marketplace

Install extensions from a registry or a ZIP. Channels are stable, preview, and experimental.



The marketplace installs **extensions** for Desktop and the CLI. Extensions can add tools, system prompt fragments, approval or questions flows, settings, secret storage, and host UI.

## Install [#install]

* **Registry** — browse and install from the default catalog (`https://raw.githubusercontent.com/SpiritAgents/registry/refs/heads/main/registry/`)
* **ZIP** — import an archive (`spirit extension import ./extension.zip` or **Settings → Extensions**)

Channels:

| Channel        | Meaning             |
| -------------- | ------------------- |
| `stable`       | Default             |
| `preview`      | Pre-release         |
| `experimental` | May change or break |

Desktop has a marketplace view (search, featured, readme, changelog, versions, review before install). The CLI has `spirit extension marketplace list|detail|readme|install`, plus `list`, `import`, and `remove`.

To author an extension, see [Extensions](../develop/extensions.mdx).