Guardrails

Name: Guardrails
Author: ExpertVagabond

by ExpertVagabondversion 1.0.1i★ 1iRuns on your computer

Registry nameio.github.ExpertVagabond/guardrails

How to install

Overview

Description from the maker (original English)

AI Agent Guardrails MCP server - security layer

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Cybersecurity

Install

Pick the AI app you use, then copy the settings.

Passed 3/3 checks · Runs on your computer

First: which AI do you use?

ClaudeWeb · app · phoneChatGPTWebClaude CodeTerminalCursorCode editorVS CodeCode editorOtherOther apps

Pick your app and the steps appear below.

Works with Claude, with some setup first

Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Open the Claude desktop app’s settings file
SettingsDeveloperEdit Config
Done

Paste these settings and save the file

{
  "mcpServers": {
    "guardrails": {
      "command": "npx",
      "args": [
        "-y",
        "guardrails-mcp-server"
      ]
    }
  }
}

Done

Quit Claude and open it again
Done
Try it
Use Guardrails and tell me what you can do for me, then show me one thing
✓ If Claude says it is using Guardrails or shows a Guardrails tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

ChatGPT cannot connect Guardrails yet

Guardrails runs on your computer, but ChatGPT can only connect servers that run on the web

What you can do instead

A · Use an app that can connect Guardrails

Steps for Claude →Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone
Steps for Claude Code →Install Node.js on your computer first (one time)
Steps for Cursor →Install Node.js on your computer first (one time)
Steps for VS Code →Install Node.js on your computer first (one time)

B · Others in Cybersecurity that work with ChatGPT

Picked from the most used in the same category, only ones that connect by address with no key

GitHits✓ ChatGPT
EchelonGraph CVE & Exposure✓ ChatGPT
GoSQLX✓ ChatGPT

Works with Claude Code, with some setup first

Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Open Terminal
Mac: press Command+Space and type Terminal · Windows: open PowerShell
Done

Paste this command and press Enter

claude mcp add guardrails -- npx -y guardrails-mcp-server

Done

Type /mcp in Claude Code
You should see Guardrails listed as connected
Done
Try it
Use Guardrails and tell me what you can do for me, then show me one thing
✓ If Claude Code says it is using Guardrails or shows a Guardrails tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with Cursor, with some setup first

Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Click this button to open Cursor
Open in Cursor
Cursor asks you to confirm; click Install
Done
Open the AI chat in Cursor in Agent mode
Done
Try it
Use Guardrails and tell me what you can do for me, then show me one thing
✓ If Cursor says it is using Guardrails or shows a Guardrails tool in the answer, you are connected

Menu names checked against Cursor’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with VS Code, with some setup first

Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Click this button to open VS Code
Open in VS Code
VS Code asks you to confirm; click Install
Done
Open the AI chat in VS Code in Agent mode
Done
Try it
Use Guardrails and tell me what you can do for me, then show me one thing
✓ If VS Code says it is using Guardrails or shows a Guardrails tool in the answer, you are connected

Menu names checked against VS Code’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.

See every app that uses MCP →

JSON settings are under “For developers” below

Stuck? Ask people who use Guardrails💬 Discussion →

For developers: Terminal commands and JSON settings

Installed on your computer

Claude Code

claude mcp add guardrails -- npx -y guardrails-mcp-server

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "guardrails": {
      "command": "npx",
      "args": [
        "-y",
        "guardrails-mcp-server"
      ]
    }
  }
}

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "guardrails": {
      "command": "npx",
      "args": [
        "-y",
        "guardrails-mcp-server"
      ]
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "guardrails": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "guardrails-mcp-server"
      ]
    }
  }
}

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

At a glance

GitHub stars i: 1
Downloads per weeki: 75/wk
Licence i: MIT
Connection: Runs on your computer
Transport: stdio
Latest versioni: 1.0.1
Categoryi: Cybersecurity
Published to registryi: Feb 15, 2026
Code last changedi: Sep 8, 2026
Maker: ExpertVagabond
Packages: npm: guardrails-mcp-server
Repo: ExpertVagabond/guardrails-mcp-server
Registry status: Active

Which apps can use it

Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.

Run on your computer in

Claude Goose LM Studio Msty Studio Cherry Studio Cursor VS Code + GitHub Copilot Visual Studio Windsurf (Devin Desktop)Zed Kiro Cline Continue JetBrains AI Assistant Claude Code Codex CLI Gemini CLI OpenCode nodecode Warp LibreChat Raycast

All apps, with pros and cons →

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 11, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account ExpertVagabond, which owns the repo
✓ Pass
Still maintained
Code last changed 2 months ago
✓ Pass
Has a licence
Uses MIT
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Discussion

Ask, share a tip or report that it does not work. Sorted by what people marked helpful.

No posts yet. Be the first to ask or share.

Posts here are written by users, not the PopNx team.

User reviews

No reviews yet

Compared with others in Cybersecurityi

More stars than 72% of the other 1037 servers in this category
Published to the registry more recently than 4% of the other 1037 servers in this category
Basic checks equal to or better than 100% of the other 1037 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Guardrails safe?

It passed 3 of 3 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed 2 months ago, and the latest version (1.0.1) reached the registry 9 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Robin: AI-Powered Dark Web OSINT, HOL Guard, UniFi Network MCP

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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by apurvsinghgautamGrowing★ 8KUpdated 40 days ago

Runs on your computer

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HOL Guard

Local-first AI agent security evidence and approval workflows through HOL Guard's stdio MCP server.

by hashgraph-onlineWidely used↓ 7.1K/wk★ 1.1KUpdated 7 days ago

Runs on your computer

Install

UniFi Network MCP

Manage UniFi Network devices, clients, firewall, VLANs, VPNs, and more via MCP.

by sirkirbyWidely used↓ 11.3K/wk★ 1K Stars for the whole repoUpdated 8 months ago

Runs on your computer

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

guardrails-mcp-server

\ \ \

MCP server for AI agent security guardrails. Provides input validation, prompt injection detection, PII redaction, output filtering, policy enforcement, rate limiting, and comprehensive audit logging.

Tools

Tool	Description
`validate_input`	Validate and sanitize incoming requests through all guardrail checks
`filter_output`	Filter and redact sensitive data (PII, secrets, credentials) from responses
`check_policy`	Evaluate a request against security policies (RBAC, resource access, quotas)
`get_audit_logs`	Query the audit log with filtering by type, user, time range
`get_stats`	Get engine statistics including active users, block rate, request counts
`update_config`	Update guardrail configuration at runtime

Security Features

Prompt Injection Detection -- 12 regex patterns for jailbreak, DAN mode, system prompt override
PII Detection and Redaction -- SSN, credit card, email, phone, IP, API keys, AWS keys, JWT, passwords, private keys, connection strings
Malicious Code Blocking -- eval, exec, subprocess, child_process, shell injection
Policy Engine -- Block sensitive paths, dangerous tools, unauthenticated destructive ops, URL allowlist, maintenance windows
Rate Limiting -- Per-user sliding window (configurable requests/minute)
Audit Logging -- Timestamped events with metrics, log rotation, external handler support

Install

npm install

Configuration

"mcpServers": { "guardrails": { "type": "stdio", "command": "node", "args": ["/path/to/guardrails-mcp-server/index.js"] } } }

Project Structure

src/engine/GuardrailsEngine.js    # Core orchestration

src/validators/InputValidator.js # Prompt injection and PII detection src/filters/OutputFilter.js # Redaction and harmful content blocking src/policies/PolicyEngine.js # RBAC, quotas, maintenance windows src/audit/AuditLogger.js # Event logging and metrics

License

MIT

Guardrails

Overview

What you can do with it

Install

Install Node.js

Open the Claude desktop app’s settings file

Paste these settings and save the file

Quit Claude and open it again

Try it

What you can do instead

Install Node.js

Open Terminal

Paste this command and press Enter

Type /mcp in Claude Code

Try it

Install Node.js

Click this button to open Cursor

Open the AI chat in Cursor in Agent mode

Try it

Install Node.js

Click this button to open VS Code

Open the AI chat in VS Code in Agent mode

Try it

Installed on your computer

At a glance

Which apps can use it

Related guides

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Discussion

User reviews

Compared with others in Cybersecurityi

Common questions

Alternatives

Robin: AI-Powered Dark Web OSINT

HOL Guard

UniFi Network MCP

README from the maker

guardrails-mcp-server

Tools

Security Features

Install

Configuration

Project Structure

License