Tripwire Guard — evidence-first injection scanner
Overview
Description from the maker (original English)
Local read-only MCP scanner for known prompt-injection patterns with exact evidence and no network.
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 checksi2 of 2 passedChecked from public information; code not scanned yet
- UsageiVery new↓ 53/wk · ★ 0
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: Search & AI memory
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 2 of 2 passed
- Runs on your computer with your user’s permissions (files, network, apps).
- The registry lists no key to fill in.
You need
Which app do you use?
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": {
"tripwire-guard": {
"command": "npx",
"args": [
"-y",
"tripwire-guard"
]
}
}
}Run this in your terminal
claude mcp add tripwire-guard -- npx -y tripwire-guardOr copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"tripwire-guard": {
"command": "npx",
"args": [
"-y",
"tripwire-guard"
]
}
}
}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.
Or copy the settings yourself
Paste into .vscode/mcp.json in your project
{
"servers": {
"tripwire-guard": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"tripwire-guard"
]
}
}
}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.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
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
ClaudeGooseLM StudioMsty StudioCherry StudioCursorVS Code + GitHub CopilotVisual StudioWindsurf (Devin Desktop)ZedKiroClineContinueJetBrains AI AssistantClaude CodeCodex CLIGemini CLIOpenCodenodecodeWarpLibreChatRaycast
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 KubaOpoczka, which owns the repo
- ✓ Pass
Still maintained
Code last changed 3 months ago
- … 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 Search & AI memoryi
- More stars than 0% of the other 5861 servers in this category
- Published to the registry more recently than 29% of the other 5861 servers in this category
- Basic checks equal to or better than 100% of the other 5861 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 Tripwire Guard — evidence-first injection scanner safe?
It passed 2 of 2 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 3 months ago, and the latest version (0.4.2) reached the registry 3 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: Ruflo, Context7, Metabase
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
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.
Tripwire Guard
Public package:
tripwire-guard. A clean install and MCP handshake were verified on 13 August 2026.
A local, read-only MCP server that inspects untrusted text for prompt-injection before it enters an AI agent's context.
Give it text (a web page, document, email, ticket, RAG chunk) and it returns an allow / review / recommend_block decision with the exact matched evidence. It runs entirely on your machine, makes no network requests, and redacts emails, URLs and credential-like strings by default.
The engine is deterministic and ships with a public 100-case maintainer-authored evaluation — 85% accuracy, with every false positive and false negative published. It is a fast, explainable signal layer; it is not a guarantee of safety, and the host remains responsible for enforcing the decision.
Unlike an MCP proxy, Tripwire Guard does not intercept or authorize other tool calls. Unlike a model-based detector, it needs no model runtime or API. Pair it with least-privilege tools, approval gates, isolation and action-sink enforcement.
Install / run
Requires Node.js 22.12+.
npx tripwire-guardUse it in an MCP host
{"mcpServers": { "tripwire": { "command": "npx", "args": ["-y", "tripwire-guard"] } } }
The tool
tripwire_scan (read-only) — inputs:
content(string, required) — untrusted text to inspect.source(string, optional) — provenance, e.g. a page URL, email, tool result, or document name.includeEvidence(boolean, optional) — return raw matched evidence instead of redacted. Defaults to redacted.
Returns structured evidence: the decision, a finding count, per-finding rule id / severity / category / matched span, and the engine + ruleset versions.
The npm package is versioned independently from the detector engine reported inside each result. Package 0.4.2 currently ships engine 0.3.0 and ruleset 2026.08.2.
Honest limits
Deterministic heuristics can miss novel, contextual, multilingual, visual, or heavily obfuscated attacks. A clean result means "no known signal matched," not "safe." Pair it with least-privilege tools, approval gates, and sandboxing.
Map the surrounding system
Use the free agent action-path worksheet to map an untrusted input, its reachable tools, the consequential action sink, existing controls, and the minimum safe test evidence. It is ungated and contains a clearly labelled synthetic example.
More
Live demo, full benchmark, threat model, and fixed-scope team review: https://tripwire-live.netlify.app
Source and security boundary
This repository contains the distributable MIT-licensed, read-only Guard MCP server and its release metadata. The broader Tripwire browser product and paid review materials are maintained separately. Report package defects through this repository's issue tracker; do not post secrets, customer data, private prompts, or live credentials.
© 2026 Kuba Opoczka.