Unstorage MCP Server
@slow-groovin
About Unstorage MCP Server
Key-Value storage MCP server based on unjs/unstorage, support drivers: redis, mongodb, filesystem. http
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"
]
}
}
}Tools
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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-modifyflag 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.
FAQ from Unstorage MCP Server
What drivers does Unstorage MCP Server support out of the box?
Memory, filesystem, Redis, MongoDB, and unstorage HTTP server.
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.
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.
What happens if I don’t define any root mount?
A memory driver is automatically mounted on "/", mirroring the default behavior of unstorage.
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.
Frequently asked questions
What drivers does Unstorage MCP Server support out of the box?
Memory, filesystem, Redis, MongoDB, and unstorage HTTP server.
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`.
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.
What happens if I don’t define any root mount?
A memory driver is automatically mounted on `"/"`, mirroring the default behavior of unstorage.
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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