ADK-Rust
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mcp-storage

Universal cloud storage MCP server — manage files across AWS S3, Google Cloud Storage, Cloudflare R2, MinIO, and any S3-compatible provider through a single interface. 12 tools for listing, uploading, downloading,…

Open the source Read the official guide ↗

What it gives an agent

A purpose-built capability behind one MCP connection.

The server owns its domain logic and publishes a tool contract an MCP client can discover. ADK-Rust can load that contract into an agent, normalize each schema for the chosen model provider, and keep the connection lifecycle outside the agent’s business logic.

01

Provides storage capabilities through a typed MCP contract.

Architecture

How mcp-storage fits into an agent system.

The model never needs the implementation details or credentials of the system behind the server. It sees reviewed tool definitions. The MCP client handles discovery and calls, while the server keeps ownership of validation, policy, and communication with its domain system.

01

ADK-Rust agent

Chooses a capability from the reviewed tool catalog.

02

MCP client

Discovers schemas, sends calls, and receives typed content.

03

mcp-storage

Validates the request and owns 12 documented tool contracts.

04

Domain system

Keeps the API, data, credentials, and business rules behind the server.

Connection: stdio · Server framework: ADK MCP SDK + rmcp

This repository does not currently publish a dedicated architecture SVG. The integration diagram above is generated from its documented transport and server boundary; use the official README for implementation-specific details.

Tool catalog

What can an agent ask mcp-storage to do?

Each tool has a stable name, a human-readable purpose, and a JSON input contract discovered during MCP initialization. Risk classes come from the project’s registry manifest when one is available.

12 named tools

list_buckets

List all buckets/containers

read only
list_objects

List objects in a bucket with optional prefix filter

read only
get_object_info

Get object metadata

read only
download_object

Download object content

read only
generate_presigned_url

Generate temporary access URL

read only
upload_object

Upload content to an object path

internal write
copy_object

Copy object within/between buckets

internal write
move_object

Move object (copy + delete source)

internal write
delete_object

Delete a single object

internal write
create_bucket

Create a new bucket

internal write
search_objects

Search objects by prefix pattern

read only
get_storage_usage

Get storage usage summary for a bucket

read only

Governance

Understand the effect of every tool.

A server connection inherits the authority of its credentials and deployment environment. The declarations below come from this project’s README and MCP registry manifest; your application still decides which tools an agent receives and where approval is required.

7 read only5 internal write
  • Write operations are gated — delete_object, move_object, and create_bucket require approval in governed environments
  • Presigned URLs expire — default 1 hour, configurable per request
  • No secrets in responses — credentials are never echoed back
  • Read-only by default — browse and download tools don't modify anything

MCP surface

What the current documentation declares.

MCP can carry tools, resources, prompts, structured results, progress, cancellation, and long-running work. This record highlights the modern protocol features explicitly mentioned by this repository.

The current README concentrates on its tool surface. Check the source and release notes before relying on optional MCP capabilities beyond tool discovery and invocation.
ADK MCP SDKrmcpRegistry manifest

Install and connect

Follow the project’s documented starting point.

Install the server in the environment that owns its credentials and domain access. Add it to your MCP host, verify the discovered tools, and narrow the toolset before giving it to a production agent.

Install
cargo install mcp-storage
MCP client configuration
{
  "mcpServers": {
    "storage": {
      "command": "mcp-storage",
      "env": {
        "STORAGE_ENDPOINT": "https://storage.googleapis.com",
        "STORAGE_ACCESS_KEY": "GOOG1E...",
        "STORAGE_SECRET_KEY": "your-secret",
        "STORAGE_REGION": "us-east-1"
      }
    }
  }
}

Commands and configuration are extracted from the public README. Confirm prerequisites, environment variables, and release-specific options in the official documentation before deployment.

Official documentation

Continue with the project maintainers’ source of truth.

This page provides an approachable map of the server. The repository remains authoritative for exact schemas, prerequisites, configuration, examples, tests, releases, and security updates.

Overview ↗README.mdIssues and support ↗github.com issues

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Source record

Release and repository metadata for this catalog entry.

View public repository ↗
Version
1.0.1
License
Apache-2.0
Tools
12
Revision
d8f02e610c50
Updated
May 27, 2026
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