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Unstorage MCP Server

@slow-groovin

Repository

Basic information

Category

Databases

License

MIT license

Transports

stdio

Author

slow-groovin

About Unstorage MCP Server

Key-Value storage MCP server based on unjs/unstorage, support drivers: redis, mongodb, filesystem. http

#mcp#kv-store#unstorage#mcp-server

Unstorage MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "unstorage": {
      "command": "npx",
      "env": {
        "REDIS_URL": "redis://default:123456@localhost:6379",
        "REDIS_BASE": "my:mcp:values:",
        "REDIS_MOUNT_POINT": "redis_storage"
      },
      "args": [
        "/y",
        "@slow-groovin/unstorage-mcp",
        "--disable-modify"
      ]
    }
  }
}

Unstorage MCP Server tools

Tool list not available yet

This listing does not currently have a tool list to display. This does not mean the server has no tools; check its documentation for supported capabilities.

Fetch the live tool list by running this server in a temporary sandbox using the button above.

Overview

What is Unstorage MCP Server?

A Key-Value storage MCP server based on unjs/unstorage. It mounts multiple storage backends (memory, filesystem, Redis, MongoDB, HTTP server) and exposes CRUD operations as MCP tools. Designed for developers who need to interact with diverse key-value stores through an AI agent or MCP client.

How to use Unstorage MCP Server?

Install via npm with npx @slow-groovin/unstorage-mcp, configuring drivers through environment variables (e.g., REDIS_URL, MONGODB_URL, FS_BASE, HTTP_BASE). Use arguments like --disable-modify to restrict write operations. Run with an MCP inspector or as a local dev server using tsx.

Key features of Unstorage MCP Server

  • Supports memory, filesystem, Redis, MongoDB, and HTTP storage drivers.
  • Provides 12 tools: showMounts, getItem, getItems, getItemRaw, getMeta, getKeys, setItem, setItems, setItemRaw, setMeta, removeItem, removeMeta.
  • --disable-modify flag to forbid destructive tools.
  • Automatic fallback to memory driver when no root mount is defined.
  • Easy to extend: clone repo, copy a driver file, and implement.
  • Environment variables configure driver-specific base paths and mount points.

Use cases of Unstorage MCP Server

  • Let an AI assistant read and write key-value data in Redis, MongoDB, or the filesystem.
  • Provide a unified MCP interface to multiple storage backends for debugging or operations.
  • Enable AI agents to store session state, configuration, or temporary data across runs.
  • Quickly test or prototype storage interactions without writing a custom MCP server.

Frequently asked questions

1

What drivers does Unstorage MCP Server support out of the box?

Memory, filesystem, Redis, MongoDB, and unstorage HTTP server.

2

Can I disable write operations to prevent accidental modifications?

Yes, pass the `--disable-modify` argument to the server. This disables `setItem`, `setItems`, `setItemRaw`, `setMeta`, `removeItem`, and `removeMeta`.

3

How do I configure the Redis driver?

Set the `REDIS_URL` environment variable (e.g., `redis://user:pass@host:6379`). Optionally set `REDIS_BASE` and `REDIS_MOUNT_POINT`. Similarly for MongoDB, filesystem, and HTTP drivers.

4

What happens if I don’t define any root mount?

A memory driver is automatically mounted on `"/"`, mirroring the default behavior of unstorage.

5

How can I add a new storage driver?

Clone the repository, copy an existing driver file (e.g., `src/storage/redis.ts`), modify it to use the desired unjs/unstorage driver, test, and optionally open a pull request.

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