# MCPVetter (npm · mcpvetter)

Audit your MCP servers for poisoned tools and leaked secrets, and check AI-generated code for flaws.

- Trust score: 66/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `mcpvetter.com`: 36/100, [markdown](https://verifymcp.io/servers/com-mcpvetter-mcpvetter/mcpvetter.md), [page](https://verifymcp.io/servers/com-mcpvetter-mcpvetter/mcpvetter)
- npm · `mcpvetter`: 66/100 (this document), [markdown](https://verifymcp.io/servers/com-mcpvetter-mcpvetter/mcpvetter-2.md), [page](https://verifymcp.io/servers/com-mcpvetter-mcpvetter/mcpvetter-2)

## Channel facts

- Registry: `npm`
- Package: `mcpvetter`
- Version: `0.1.3`
- 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 2026-11-05.

- **Supply Chain Security**: 81/100
  - No malware found by supply-chain analysis.
  - CVE check failed: a known high-severity CVE affects zod 3.25.76, a direct dependency. A fixed version is available.
  - No install/post-install scripts declared.
  - 30 of 93 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 48/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 2 days ago).
  - Publishes a security disclosure policy (SECURITY.md).
- **Schema Quality & AI Usability**: 78/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 923 tokens (~131/item across 7 items; 7 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **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 7 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 8 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.

**Unverified: 1 category.** A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.

## Install

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

MCPVetter runs locally as an npm package, launched with npx -y mcpvetter serve. 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 com-mcpvetter-mcpvetter -- npx -y mcpvetter serve
```

### Cursor

```json
{
  "mcpServers": {
    "com-mcpvetter-mcpvetter": {
      "command": "npx",
      "args": [
        "-y",
        "mcpvetter",
        "serve"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-mcpvetter-mcpvetter": {
      "command": "npx",
      "args": [
        "-y",
        "mcpvetter",
        "serve"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add com-mcpvetter-mcpvetter -- npx -y mcpvetter serve
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add com-mcpvetter-mcpvetter --command npx --arg -y --arg mcpvetter --arg serve
```

### Hermes

```yaml
mcp_servers:
  com-mcpvetter-mcpvetter:
    command: "npx"
    args: ["-y", "mcpvetter", "serve"]
```

### Netclaw

```json
{
  "McpServers": {
    "com-mcpvetter-mcpvetter": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "mcpvetter",
        "serve"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-mcpvetter-mcpvetter -t stdio -c npx -a -y mcpvetter serve
```

### Other

```json
{
  "mcpServers": {
    "com-mcpvetter-mcpvetter": {
      "command": "npx",
      "args": [
        "-y",
        "mcpvetter",
        "serve"
      ]
    }
  }
}
```

## 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.

### 2026-11-04 (score 66, +5)

- [security regression] CVE-2023-54404 affects this package: high
- [security regression] Known CVEs: unverified → fail
- [functional improvement] Dependency health: unverified → 0.85

### 2026-11-03 (score 61)

First indexed and scored.

## MCP tools (7)

### `review_code` (~172 tokens)

Review code for security flaws

Check a code snippet for security flaws before presenting or committing it. Call this before showing the user any generated code that handles authentication, sessions, database queries, user or LLM input, HTML rendering, file uploads, outbound URL fetches, secrets, or MCP configuration. Returns prioritised findings, each with evidence, a concrete fix, and a 5-minute lab. Analysis is static and deterministic; it checks at the moment of generation and is not a guarantee.

Input parameters:

- `ai_generated` (boolean): True if an AI assistant produced this code.
- `code` (string, required): The code to review (a snippet or a whole file).
- `filename` (string): Optional file name, used for language detection only.
- `language` (string): javascript, typescript, python, or json. Detected if omitted.

### `explain_finding` (~106 tokens)

Explain a security finding

Explain an MCPVetter finding in plain English: why it matters, how the flaw is triggered (in general, defensive terms), why a code reviewer would block it, and how to fix it. Call this when the user asks what a finding ID (like CODE-SQLI-001 or MCP-POISON-001) means or why it matters.

Input parameters:

- `id` (string, required): Finding ID, e.g. CODE-SQLI-001 or MCP-SECRET-001.

### `secure_pattern` (~156 tokens)

Get the secure version of a coding pattern

Return a vetted secure code example for a pattern in the user's stack, the insecure version to avoid, and a reviewer checklist. Call this when writing code for: database queries, secrets/API keys, login and sessions, rendering user content as HTML, sending user input to an LLM, using LLM output, file uploads, fetching URLs/webhooks, or configuring MCP servers. Example requests: "parameterised query in Node", "safe handling of LLM output in Python".

Input parameters:

- `request` (string, required): What you need, e.g. 'parameterized query in Node' or a pattern id like 'url-fetching'.
- `stack` (string): Optional stack hint: node, python, express, django, fastapi, next...

### `start_lab` (~127 tokens)

Start a 5-minute secure-coding lab

Start a short hands-on lab that fixes one vulnerability in realistic AI-generated code. Call this when the user wants to learn how to fix a finding, or after review_code reports a finding with a lab. Pass a lab id (lab-02-sqli) or a finding id (CODE-SQLI-001). Then help the user fix the snippet and submit it with check_lab.

Input parameters:

- `finding_id` (string): Finding id; the matching lab is opened.
- `lab_id` (string): Lab id, e.g. lab-02-sqli. Omit to list labs.

### `check_lab` (~76 tokens)

Check a lab solution

Verify a fixed snippet for a lab started with start_lab. Runs the lab's security checks on the code and records progress. Call this when the user says their lab fix is ready.

Input parameters:

- `code` (string, required): The complete fixed code.
- `lab_id` (string, required): The lab id, e.g. lab-02-sqli.

### `check_mcp_setup` (~126 tokens)

Audit MCP server setup

Audit the MCP servers configured on this machine (Claude Code, Claude Desktop, Cursor, VS Code, Windsurf, Gemini CLI) for leaked secrets, unpinned or look-alike packages, risky launch commands, unencrypted remote servers, over-broad file access, and dangerous server combinations. Call this when the user asks whether their MCP setup or a server is safe. Static and local; for tool-description poisoning run `npx mcpvetter scan --live` in a terminal.

Input parameters:

- `config` (string): Optional pasted config JSON; omit to scan this machine.

### `team_posture` (~68 tokens)

Team security posture

Team plan: aggregated, de-identified counts of recurring code findings, MCP risk by category, and lab completion for the user's team over the last 30 days. No code or per-developer detail. Call this when a team lead asks how exposed the team is or which flaws keep recurring.

## Diagnostics

Captured diagnostic sections: Provenance, Vulnerabilities, Dependencies. The full working is on the page: https://verifymcp.io/servers/com-mcpvetter-mcpvetter/mcpvetter-2#diagnostics

## Score history

- 2026-11-05: 66
- 2026-11-04: 66
- 2026-11-03: 61

## Common questions

### What is the MCPVetter MCP server?

MCPVetter is an MCP server listed in the public MCP registry as com.mcpvetter/mcpvetter. Audit your MCP servers for poisoned tools and leaked secrets, and check AI-generated code for flaws. This page covers its npm package (mcpvetter).

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

MCPVetter scores 66 out of 100 on VerifyMCP. We recorded 1 known advisory against it as of 5 November 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 MCPVetter MCP server expose?

MCPVetter exposes 7 tools: review_code, explain_finding, secure_pattern, start_lab, check_lab, and 2 more. Their descriptions and schemas cost roughly 831 tokens of context every time the server is loaded.

### Is the MCPVetter MCP server still maintained?

MCPVetter is still listed as active in the MCP registry. We last reached this channel on 5 November 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 MCPVetter MCP server under?

MCPVetter declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

### What did VerifyMCP test on the MCPVetter MCP server?

VerifyMCP ran 15 checks on MCPVetter, covering Malware scan, Known CVEs, Install scripts, Dependency health and 11 more. One item could not be completed, a gap on our side rather than a finding about MCPVetter: Stability. One category scores 0 for that reason, because we only credit what we can confirm. Endpoint Security and Transport & Reachability do not apply to an npm package, so they were not tested. The score does not measure everything, and the scoring documentation lists what it leaves out.

## Links

- npm package: https://www.npmjs.com/package/mcpvetter
- Socket report: https://socket.dev/npm/package/mcpvetter
- Repository: https://github.com/jaablon/mcpvetter
- Website: https://mcpvetter.com/
- Changelog RSS feed: https://verifymcp.io/servers/com-mcpvetter-mcpvetter/mcpvetter-2.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-mcpvetter-mcpvetter/mcpvetter-2/changelog.json
- Trust report (JSON): https://verifymcp.io/servers/com-mcpvetter-mcpvetter/mcpvetter-2.json
- HTML version of this page: https://verifymcp.io/servers/com-mcpvetter-mcpvetter/mcpvetter-2