Virtual Filesystem MCP Server

by lu-zhengda Your server? Claim it

local only

Virtual Filesystem runs on your own machine — the client starts it, so there is no endpoint to ping. 29 installs a week from npm. Last commit 16 Feb 2026.

PostgreSQL-backed virtual filesystem for agents: session isolation, shared stores, POSIX ops, RLS.

Installs per day peak 12 · avg 6 · -48% w/w

a month agotoday

Installs / week

npm · mcp-virtual-fs

Stars

1 open issues

16 Feb 2026

Last commit

0 releases in 90 days

MIT

License

TypeScript

Nothing serious here today

Today is the operative word: we check Virtual Filesystem every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add virtual-fs -- npx -y mcp-virtual-fs

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "virtual-fs": {
      "args": [
        "-y",
        "mcp-virtual-fs"
      ],
      "command": "npx"
    }
  }
}

~/.codex/config.toml

[mcp_servers.virtual-fs]
command = "npx"
args = ["-y", "mcp-virtual-fs"]

.cursor/mcp.json

{
  "mcpServers": {
    "virtual-fs": {
      "args": [
        "-y",
        "mcp-virtual-fs"
      ],
      "command": "npx"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "virtual-fs": {
      "args": [
        "-y",
        "mcp-virtual-fs"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: DATABASE_URL (PostgreSQL connection string (e.g. postgresql://user:pass@host:5432/dbname)), VFS_AUTO_INIT (Auto-create database tables on startup (set to 'true' for first run)), VFS_SESSION_ID (Deterministic session ID for resumable sessions across restarts), VFS_ENABLE_RLS (Enable PostgreSQL Row Level Security for database-enforced session isolation). The author declared them in the registry entry; get the values from the project itself.

Alternatives to Virtual Filesystem

same job, measured the same way

Data

by thinair

PostgreSQL, MySQL, and SQL Server in one session. 26 read-only MCP tools for AI agents.

answering

pgops

by arzharch

Safe, audited PostgreSQL operations for AI agents: queries, migrations, EXPLAIN, containers

972 installs/wk local only

Dataxplan MCP

by arikanatakan

Read PostgreSQL EXPLAIN plans for AI agents: bottlenecks, estimation errors, fixes, charts.

59 installs/wk local only

pgvector

by mittalpk

Similarity search, hybrid search, and index management for pgvector-backed PostgreSQL tables

62 installs/wk local only

Quarry

by wangggym

Safety-railed database access for agents: Postgres, MySQL, Redis. Read-only by default.

166 installs/wk local only

MCP Postgres Nl Query

by infoinlet-marketplace

RLS/tenant-aware Postgres for AI agents — schema, read-only SQL, NL→SQL with safety rails.

26 installs/wk local only

Run402

by run402

x402 pay-per-call infra for agents: $0.03 image generation, Postgres, auth, storage, functions.

3 775 installs/wk 4 tools answering

Echo Memory

by ayushcodes10

Shared memory for AI agents, as a graph in your own Postgres. Writes never call an LLM.

answering

Virtual Filesystem — questions

Answers built from our own checks of this server.

Why is there no uptime for Virtual Filesystem?

Virtual Filesystem runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package mcp-virtual-fs was installed 29 times last week.

How do I connect Virtual Filesystem?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls mcp-virtual-fs straight from npm; nothing to host, nothing to sign up for.

How many people use Virtual Filesystem?

The npm package mcp-virtual-fs was installed 29 times in the last week. Week over week that is -48%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is Virtual Filesystem open source?

Yes — it is published under the MIT licence, written in TypeScript, 3 stars on GitHub and 1 open issue. The source link is on this page, so you can read exactly what it does with your data before you connect it.