Virtual Filesystem runs on your own machine — the client starts it, so there is no endpoint to ping. 46 installs a week from npm. Last commit 16 Feb 2026.
PostgreSQL-backed virtual filesystem for agents: session isolation, shared stores, POSIX ops, RLS.
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 mcp add virtual-fs -e 'DATABASE_URL=<DATABASE_URL>' -- npx -y mcp-virtual-fs{
"mcpServers": {
"virtual-fs": {
"command": "npx",
"args": [
"-y",
"mcp-virtual-fs"
],
"env": {
"DATABASE_URL": "<DATABASE_URL>"
}
}
}
}[mcp_servers.virtual-fs]
command = "npx"
args = ["-y", "mcp-virtual-fs"]
env = { DATABASE_URL = "<DATABASE_URL>" }{
"mcpServers": {
"virtual-fs": {
"command": "npx",
"args": [
"-y",
"mcp-virtual-fs"
],
"env": {
"DATABASE_URL": "<DATABASE_URL>"
}
}
}
}{
"servers": {
"virtual-fs": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"mcp-virtual-fs"
],
"env": {
"DATABASE_URL": "<DATABASE_URL>"
}
}
}
}Put your own value in place of
<DATABASE_URL> (PostgreSQL connection string (e.g. postgresql://user:pass@host:5432/dbname)).
The author’s registry entry marks it as required.
Optional settings from the registry entry, left out of the block above:
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).
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Virtual Filesystem — questions
Answers built from our own checks of this server.