# Preventionlabs (npm · preventionlabs-mcp)

See what's broken on a live website from the outside: errors, uptime, DNS, HTTPS, leaked files.

- Trust score: 64/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-18

## Components

- npm · `preventionlabs-mcp`: 64/100 (this document), [markdown](https://verifymcp.io/servers/au-com-preventionlabs-preventionlabs/preventionlabs-mcp.md), [page](https://verifymcp.io/servers/au-com-preventionlabs-preventionlabs/preventionlabs-mcp)

## Channel facts

- Registry: `npm`
- Package: `preventionlabs-mcp`
- Version: `1.2.0`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-10-18.

- **Supply Chain Security**: 98/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 31 of 92 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 6/100
  - Repository check failed: no source repository is declared.
  - Provenance check failed: no build-provenance attestation is published.
  - License check failed: the license (UNLICENSED) isn't a recognized OSI-approved license.
  - Actively maintained (last published 0 days ago).
  - Security-disclosure policy not yet verified: we couldn't inspect the source repository.
- **Schema Quality & AI Usability**: 78/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 942 tokens (~314/item across 3 items; 3 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 10/100
  - Stability observed for 3 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the Preventionlabs MCP server?

Preventionlabs runs locally as an npm package, launched with npx -y preventionlabs-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add au-com-preventionlabs-preventionlabs -- npx -y preventionlabs-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "au-com-preventionlabs-preventionlabs": {
      "command": "npx",
      "args": [
        "-y",
        "preventionlabs-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "au-com-preventionlabs-preventionlabs": {
      "command": "npx",
      "args": [
        "-y",
        "preventionlabs-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add au-com-preventionlabs-preventionlabs -- npx -y preventionlabs-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "au-com-preventionlabs-preventionlabs": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "preventionlabs-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add au-com-preventionlabs-preventionlabs --command npx --arg -y --arg preventionlabs-mcp
```

### Hermes

```yaml
mcp_servers:
  au-com-preventionlabs-preventionlabs:
    command: "npx"
    args: ["-y", "preventionlabs-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "au-com-preventionlabs-preventionlabs": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "preventionlabs-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add au-com-preventionlabs-preventionlabs -t stdio -c npx -a -y preventionlabs-mcp
```

### Other

```json
{
  "mcpServers": {
    "au-com-preventionlabs-preventionlabs": {
      "command": "npx",
      "args": [
        "-y",
        "preventionlabs-mcp"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-10-18 (score 64, +11)

- [security improvement] Known CVEs: unverified → pass
- [functional improvement] Dependency health: unverified → 0.85

### 2026-10-17 (score 53, −11)

- [security regression] Known CVEs: pass → unverified
- [security regression] Malware scan: pass → unverified
- [functional regression] Dependency health: 0.85 → unverified
- [functional regression] Schema quality: pass → fail
- [functional improvement] Schema quality: unverified → 100
- [functional improvement] Stability: unverified → 0.07
- [functional] Package version: 1.0.1 → 1.2.0
- [functional] Package version: 1.0.1 → 1.1.0

### 2026-10-15 (score 64, +33)

- [security improvement] Injection markers: unverified → pass
- [security] First check of Judged manipulation: pass
- [security] Stability: Stability not yet verified: not enough scan history yet (needs a 30-day window).
- [functional improvement] Tool coverage: unverified → 100
- [functional improvement] MCP protocol: unverified → pass
- [functional] First check of Schema quality: fail
- [functional] First check of Schema quality: excellent
- [functional] First check of Destructive annotations: pass
- [functional] First check of Schema quality: pass
- [functional] First check of Tool coverage: 100

### 2026-10-14 (score 31)

First indexed and scored.

## MCP tools (3)

### `list_sites` (~30 tokens)

List Preventionlabs sites

Lists the websites in the Preventionlabs account, and whether each is verified. Only verified sites can be checked.

### `run_report` (~179 tokens)

Check a live website

Runs a new Preventionlabs report on one of the account's verified websites and returns it as Markdown: what's broken on the live site and where (pages, browser errors, uptime, DNS, HTTPS, redirects, leaked files, email setup, and Cloudflare errors, deploys and recent changes when Cloudflare is connected), with evidence and what to do. Read-only. Takes 15 seconds to about a minute. Use it after a deploy or a DNS, hosting or email change, when the site seems down or broken, and again after a fix to prove it worked. Each run uses one of the site's daily runs (usually 2 per 24 hours); to reread the last result, use latest_report instead.

Input parameters:

- `site` (string): The website, e.g. example.com. Leave empty when the account has only one verified site.

### `latest_report` (~97 tokens)

Read the latest report

Returns the most recent Preventionlabs report for a verified website, how long ago it ran, and how many runs are left. Costs no run. Use it to reread a result, or to check what's left before deciding whether to run a new report. It shows the site as it was then, not now.

Input parameters:

- `site` (string): The website, e.g. example.com. Leave empty when the account has only one verified site.

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/au-com-preventionlabs-preventionlabs/preventionlabs-mcp#diagnostics

## Score history

- 2026-10-18: 64
- 2026-10-17: 53
- 2026-10-16: 64
- 2026-10-15: 64
- 2026-10-14: 31

## Common questions

### What is the Preventionlabs MCP server?

Preventionlabs is an MCP server listed in the public MCP registry as au.com.preventionlabs/preventionlabs. See what's broken on a live website from the outside: errors, uptime, DNS, HTTPS, leaked files. This page covers its npm package (preventionlabs-mcp).

### Is the Preventionlabs MCP server safe to use?

Preventionlabs scores 64 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 18 October 2026. It declares no install or post-install scripts. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Preventionlabs MCP server expose?

Preventionlabs exposes 3 tools: list_sites, run_report, latest_report. Their descriptions and schemas cost roughly 306 tokens of context every time the server is loaded.

### Is the Preventionlabs MCP server still maintained?

Preventionlabs is still listed as active in the MCP registry. We last reached this channel on 18 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the Preventionlabs MCP server under?

Preventionlabs declares the UNLICENSED licence, which is not on the OSI-approved list. Read the terms before using it at work, and note this covers the source only, not the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/preventionlabs-mcp
- Socket report: https://socket.dev/npm/package/preventionlabs-mcp
- Website: https://preventionlabs.com.au/
- Changelog RSS feed: https://verifymcp.io/servers/au-com-preventionlabs-preventionlabs/preventionlabs-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/au-com-preventionlabs-preventionlabs/preventionlabs-mcp.json
- HTML version of this page: https://verifymcp.io/servers/au-com-preventionlabs-preventionlabs/preventionlabs-mcp