Gadriel AI Security Harness

Name: Gadriel AI Security Harness
Author: Gadriel-ai

by Gadriel-aiversion 1.7.1i★ –iRuns on your computer

Registry nameio.github.Gadriel-ai/gadriel

Install

Overview

Description from the maker (original English)

AI Security Harness: SAST, secrets, deps, containers, config & OWASP LLM. Scans locally.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiVery new↓ 120/wk · ★ –

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.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: GADRIEL_NO_ANONYMOUS_AUTH

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "gadriel": {
      "command": "npx",
      "args": [
        "-y",
        "gadriel",
        "code",
        "mcp"
      ],
      "env": {
        "GADRIEL_NO_ANONYMOUS_AUTH": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add gadriel --env GADRIEL_NO_ANONYMOUS_AUTH=your-value -- npx -y gadriel code mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "gadriel": {
      "command": "npx",
      "args": [
        "-y",
        "gadriel",
        "code",
        "mcp"
      ],
      "env": {
        "GADRIEL_NO_ANONYMOUS_AUTH": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "gadriel": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "gadriel",
        "code",
        "mcp"
      ],
      "env": {
        "GADRIEL_NO_ANONYMOUS_AUTH": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

GADRIEL_NO_ANONYMOUS_AUTH env
Set to 1 to skip anonymous device registration with app.gadriel.ai.

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

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 8, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account Gadriel-ai, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– 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

Compared with others in Cybersecurityi

More stars than 0% of the other 1002 servers in this category
Published to the registry more recently than 79% of the other 1002 servers in this category
Basic checks equal to or better than 100% of the other 1002 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 Gadriel AI Security Harness safe?

It passed 1 of 1 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 –, and the latest version (1.7.1) reached the registry 10 days 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: QNSQY, Gluo, Seal Security

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

QNSQY

Linux only, local: post-quantum CBOM scan, encrypt to public keys, verify. Takes no secrets

by quantumsequrityEarly↓ 906/wkUpdated today

Runs on your computer

Install

Gluo

Free agent tools, no sign-in: browser flows, test inboxes, web extract, site and security scans.

by gluo.devEarlyUpdated today

Runs in the cloud✓ gluo.dev

Install

Seal Security

Vulnerability management: scan projects, search sealed packages, manage sealing rules and reports.

by sealsecurity.ioEarlyUpdated today

Runs in the cloud✓ sealsecurity.io

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.

Gadriel — AI Security Harness for GitHub Copilot

Security scanning for the code Copilot writes: SAST, secrets, dependencies (SCA/SBOM), containers and configuration, including AI-specific risks like prompt injection and the OWASP LLM Top 10 — 3,000+ rules, scanned on your machine. Gadriel plugs into Copilot as an MCP server plus repository instructions, prompts, and reviewer agents.

[Product Overview](https://gadriel.ai/code-security) · [Documentation](https://gadriel.ai/docs) · [MCP Tools Reference](https://gadriel.ai/docs/gca/mcp-tools-reference.html) · [SAST Benchmarks](https://gadriel.ai/blog/gadriel-vs-semgrep.html)

Part of the Gadriel AI Security Harness, alongside VS Code, Claude Code, Codex, and Cursor.

Get it

Easiest — the VS Code extension. Install Gadriel AI Security Harness from the Marketplace. It registers the gadriel MCP server for Copilot automatically and adds a Gadriel: Scan Repository command — no config to edit.

Or add the MCP server yourself. The server is published to the GitHub MCP Registry as io.github.Gadriel-ai/gadriel, so it shows up in VS Code's MCP: Browse Servers and Copilot Chat's `@mcp` search — add it in a click. To wire it per-repo instead, drop this .vscode/mcp.json into your project (needs Node for npx, or npm install -g gadriel):

{ "servers": { "gadriel": { "type": "stdio", "command": "npx", "args": ["-y", "gadriel@1.7.0", "code", "mcp"] } } }

Add the Copilot guidance (optional). Copy the .github/ directory into your repo so Copilot knows how to use Gadriel:

Path	What
`.github/copilot-instructions.md`	repo-wide guidance, auto-applied
`.github/instructions/*.instructions.md`	17 topic rules, scoped by `applyTo`
`.github/prompts/*.prompt.md`	`/gadriel-scan`, `/gadriel-fix`, `/gadriel-status`, …
`.github/agents/*.agent.md`	8 reviewer agents

Use

In Copilot Chat (agent mode), just ask: "Run a Gadriel security scan on this repo and summarize the findings," or invoke a prompt like /gadriel-scan. The gadriel MCP tools — validate_file, findings_for_path, fix_finding, validate_buffer, and more — are available to Copilot directly.

Good to know

No automatic edit guardrail here. Copilot/VS Code has no edit-time hook (Cursor and Codex do), so scanning runs on request via the MCP tools and prompts rather than blocking each edit.
Enterprise: Copilot Business/Enterprise can allowlist the gadriel MCP server through managed MCP policy.
Privacy: code is scanned locally and never uploaded. First run registers an anonymous device credential with app.gadriel.ai (a random device id — no hostname, username, or keys); set GADRIEL_NO_ANONYMOUS_AUTH=1 to skip. See the privacy policy.

Maintainers

The registry listing is (re)published by .github/workflows/publish-mcp.yml (GitHub OIDC — an org namespace can only be published from CI in a Gadriel-ai repo). After a new gadriel npm release, bump server.json and the .vscode/mcp.json pin, then re-run that workflow.

License

This repository is Apache-2.0. The gadriel scanner it runs is proprietary, under the Gadriel terms.

Gadriel AI Security Harness

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

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

Compared with others in Cybersecurityi

Common questions

Alternatives

QNSQY

Gluo

Seal Security

README from the maker

Gadriel — AI Security Harness for GitHub Copilot

Get it

Use

Good to know

Maintainers

License