Unstorage

中文 README

A Key-Value storage MCP server based on unjs/unstorage.

Support drivers:

1. memory
2. filesystem
3. redis
4. unstorage http server
5. mongodb

Support transports:

• stdio
• Streamable HTTP
• SSE

Tools:

• showMounts()
• getItem(key)
• getItems(items)
• getItemRaw(key)
• getMeta(key, nativeOnly)
• getKeys(base, maxDepth)
• setItem(key, value)
• setItems(items)
• setItemRaw(key, value)
• setMeta(key, meta)
• removeItem(key, removeMeta)
• removeMeta(key)

• Unstorage MCP Server
  • Running with stdio
    • minimal configuration
    • maximum configuration
    • for Cline+Windows:
  • Running with HTTP (SSE + Streamable)
  • related arguments
  • Example prompt for use
  • args
  • environment variables
    • redis
    • mongodb
    • filesystem
    • http server
    • memory
  • extend guide
    • prompts for cursor/cline assisted programming
  • debug approaches
    • mcp-inspector
    • tsx mcpServer Config for local dev

Running with stdio

minimal configuration

{
  "mcpServers": {
    "unstorage": {
      "command": "npx",
      "args": ["-y", "@slow-groovin/unstorage-mcp"]
    }
  }
}

maximum configuration

{
  "mcpServers": {
    "unstorage": {
      "command": "npx",
      "env": {
        "REDIS_URL": "redis://default:123456@localhost:6379",
        "REDIS_BASE": "visits:date:api:",
        "REDIS_MOUNT_POINT": "redis_storage",
        "FS_BASE": "D:/tmp",
        "FS_MOUNT_POINT": "fs_storage",
        "HTTP_BASE": "http://localhost:3001",
        "HTTP_MOUNT_POINT": "http_storage",
        "HTTP_HEADERS": "Authorization=Bear 123;A=3;B=4;C=5",
        "MONGODB_URL": "mongodb://root:123456@localhost:27017/",
        "MONGODB_DB_NAME": "test",
        "MONGODB_COLLECTION_NAME": "unstorage",
        "MONGODB_MOUNT_POINT": "mongo_storage"
      },
      "args": ["-y", "@slow-groovin/unstorage-mcp", "--disable-modify"]
    }
  }
}

for Cline+Windows:

{
  "mcpServers": {
    "unstorage": {
      "command": "cmd",
      "args": ["/c", "npx", "-y", "@slow-groovin/unstorage-mcp"]
    }
  }
}

If you have problem of installation on Windows, you can refrer to this article

Running with HTTP (SSE + Streamable)

npx @slow-groovin/unstorage-mcp --http

related arguments

arg		default
--http	enable http transport instead of stdio	false
-p, --port	listening port	3000
-h, --host	listening host	localhost

Example prompt for use

The process has produced a key-value result: "fs_base:recommend_site"="www.api2o.com", store it.

args

--disable-modify

Default: false

Disable tools with modify functionality like setItem, setItems ...

environment variables

for the concept of base and mountpoint, please refer to the doc of unstorage

Set environment variables in the terminal or in the .env file

redis

if REDIS_URL is set, a redis storage will be mounted

Syntax	Description	Default Value	Optional
REDIS_URL	redis connect url, eg: redis://default:123456@localhost:6379
REDIS_BASE	base of redisDriver		✅
REDIS_MOUNT_POINT	mountpoint of this storage	"/"	✅

mongodb

if MONGODB_URL is set, a mongodb storage will be mounted

Syntax	Description	Default Value	Optional
MONGODB_URL	mongodb connect url, eg: mongodb://user:pass@host:port
MONGODB_DB_NAME	mongodb database name, eg: test
MONGODB_COLLECTION_NAME	mongodb collection name, eg: mycollection
MONGODB_MOUNT_POINT	mountpoint of this storage	"/"	✅

filesystem

if FS_BASE is set, a redis storage will be mounted

Syntax	Description	Default Value	Optional
FS_BASE	base of fsDriver, path of filesystem
FS_MOUNT_POINT	mountpoint of this storage	"/"	✅

http server

if HTTP_BASE is set, a http storage will be mounted

Syntax	Description	Default Value	Optional
HTTP_BASE	base of httpDriver, endpoint of http server
HTTP_MOUNT_POINT	mountpoint of this storage	"/"	✅
HTTP_HEADERS	headers for http requests, eg: Authorization=Bear 123;A=1;B=2		✅

memory

If there is no mount on root("/"), a memory driver will be mounted automatically on "/" (same behaviour of unstorage).

extend guide

1. clone this repo
2. copy src/storage/redis.ts to a new file and modify it to your desired driver(unjs/unstorage is super easy to learn)
3. test and verify that it is effective
4. (optional) pull a merge request

If you are not a typescript developer, please submit a issue to ask for other drivers support.

prompts for cursor/cline assisted programming

@/src/storage/mongodb.ts , please implement this file:
1. you need to fetch information using the storage type's corresponding Doc URL (https://unstorage.unjs.io/drivers/<storage type>).
2. you can refer to examples in @/src/adapter/redis.ts and @/src/storage/http.ts.
3. You are only responsible for generating the code and do not need to perform testing.

If you have not installed fetch MCP server, delete the first sentence

debug approaches

mcp-inspector

 mcp-inspector -e HTTP_BASE=http://localhost:3001 -e HTTP_MOUNT_POINT=http_storage -e FS_BASE=D:/temp -e FS_MOUNT_POINT=fs_storage -e HTTP_HEADERS="Authorization=Bear 123;" tsx ./src/index.ts

tsx mcpServer Config for local dev

{
  "mcpServers": {
    "command": "cmd",
    "env": {
      "REDIS_URL": "redis://default:123456@localhost:6379",
      "REDIS_BASE": "my:mcp:values:",
      "REDIS_MOUNT_POINT": "redis_storage"
    },
    "args": ["/c", "tsx", "D:/xxx/projects/unstorage-mcp/src/index.ts"]
  }
}

restarting server is needed to make changes take effect