> For the complete documentation index, see [llms.txt](https://docs.p0.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.p0.dev/integrations/resource-integrations/agentic-gateway/mcp-server/gcp/storage.md).

# Cloud Storage MCP server

The **Cloud Storage** MCP server is a predefined [GCP MCP server](/integrations/resource-integrations/agentic-gateway/mcp-server/gcp.md) that exposes the Google Cloud Storage API to agents, so they can work with buckets and objects. It runs P0's Google Cloud MCP image behind the [P0 AI Gateway](/readme/agentic-control-plane.md) and bridges to Google's hosted Cloud Storage MCP endpoint.

Agents can request Cloud Storage access two ways, and they never hold Google Cloud credentials: the gateway obtains a short-lived, policy-scoped token for each session using Workload Identity Federation.

* **Resource-scoped** access to a single bucket, with a role such as `storage.objectViewer` for read-only access or `storage.objectUser` for read/write access. Prefer this, since it grants the least access.
* **Project-wide** access across every resource in the project, with a role such as `storage.objectViewer`. Use this only when the calling tools must span multiple resources.

{% hint style="info" %}
The Cloud Storage MCP server is a preview feature. Contact P0 to enable it for your organization.
{% endhint %}

Before you start, complete the [GCP MCP server prerequisites](/integrations/resource-integrations/agentic-gateway/mcp-server/gcp.md#prerequisites).

## Configure the Cloud Storage MCP server

1. Follow the shared steps in [Add an MCP server](/integrations/resource-integrations/agentic-gateway/mcp-server.md#add-an-mcp-server) to name the server and choose its gateway. On the configuration screen, set the following fields, then click **Finish**:
   * **Credential source**: choose **GCP WIF federation**, then select the **Federation provider**: the GCP Workload Identity Federation identity you installed. The gateway uses this identity's audience when it federates to Google Cloud, and the provider's trust configuration authorizes it.
   * **Definition**: choose **P0**, then select **Google Cloud Storage** as the predefined server identifier.
2. The server now appears with the state **Installed**.

Once saved, P0 pushes the server definition to the gateway on its next sync, and the Cloud Storage MCP server becomes available to agents through the gateway URL. Access is granted per session and governed by your P0 policy; no long-lived Google Cloud credentials are issued.

## Next steps

* Define the MCP roles and policies that determine which agents and users may call the Cloud Storage MCP server, and what they may do in Cloud Storage.