# Power Strip Security (npm · power-strip-security-mcp)

Prompt-injection shield for agents: read pages, scan content, audit MCP servers and skills. x402.

- Trust score: 62/100 (medium)
- Change this week: +1
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `api.powerstripsecurity.workers.dev`: 67/100, [markdown](https://verifymcp.io/servers/albertbalestrini-power-strip-security/api.md), [page](https://verifymcp.io/servers/albertbalestrini-power-strip-security/api)
- npm · `power-strip-security-mcp`: 62/100 (this document), [markdown](https://verifymcp.io/servers/albertbalestrini-power-strip-security/power-strip-security-mcp.md), [page](https://verifymcp.io/servers/albertbalestrini-power-strip-security/power-strip-security-mcp)

## Channel facts

- Registry: `npm`
- Package: `power-strip-security-mcp`
- Version: `0.2.0`
- 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 2026-11-05.

- **Supply Chain Security**: 90/100
  - No malware found by supply-chain analysis.
  - CVE check failed: a known high-severity CVE affects zod 3.25.76, reached via @x402/core > zod. A fixed version is available.
  - No install/post-install scripts declared.
  - 30 of 114 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 19/100
  - Repository check failed: no source repository is declared.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 5 days ago).
  - Security-disclosure policy not yet verified: we couldn't inspect the source repository.
- **Schema Quality & AI Usability**: 76/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 487 tokens (~121/item across 4 items; 4 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability check failed: the tool surface changed between 0.1.0 and 0.2.0: 1 tool removals, 0 breaking changes, 3 additions.
- **Tool Coverage**: 97/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 92% 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 4 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 Power Strip Security MCP server?

Power Strip Security runs locally as an npm package, launched with npx -y power-strip-security-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 albertbalestrini-power-strip-security -- npx -y power-strip-security-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "albertbalestrini-power-strip-security": {
      "command": "npx",
      "args": [
        "-y",
        "power-strip-security-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "albertbalestrini-power-strip-security": {
      "command": "npx",
      "args": [
        "-y",
        "power-strip-security-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add albertbalestrini-power-strip-security -- npx -y power-strip-security-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "albertbalestrini-power-strip-security": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "power-strip-security-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add albertbalestrini-power-strip-security --command npx --arg -y --arg power-strip-security-mcp
```

### Hermes

```yaml
mcp_servers:
  albertbalestrini-power-strip-security:
    command: "npx"
    args: ["-y", "power-strip-security-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "albertbalestrini-power-strip-security": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "power-strip-security-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add albertbalestrini-power-strip-security -t stdio -c npx -a -y power-strip-security-mcp
```

### Other

```json
{
  "mcpServers": {
    "albertbalestrini-power-strip-security": {
      "command": "npx",
      "args": [
        "-y",
        "power-strip-security-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.

### 2026-10-31 (score 62, 0)

- [security regression] Stability: 0.07 → fail
- [functional regression] Schema quality: 94 → 121
- [functional improvement] Tool coverage: 80% → 92%
- [functional] Package version: 0.1.0 → 0.2.0

### 2026-10-30 (score 62, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-28 (score 61)

First indexed and scored.

## MCP tools (4)

### `read_url` (~93 tokens)

Read a web page safely

Fetch a public web page and return it as clean markdown with hidden text, invisible characters and data-exfiltration links removed, plus a prompt-injection risk report. Costs US$0.005 in USDC on Base; pages that cannot be read are not charged. Respects robots.txt.

Input parameters:

- `format` (string): markdown keeps links; text drops them
- `url` (string, required): Public http(s) URL

### `check_prompt_injection` (~97 tokens)

Scan content for prompt injection

Scan HTML or text you already have (an email, a document, a tool result) for prompt injection. Returns the risk report and the cleaned text wrapped as untrusted data. Costs US$0.002 in USDC on Base. Max 256 KB.

Input parameters:

- `content` (string, required): The HTML or text to scan
- `format` (string)
- `url` (string): Where the content came from (optional)

### `audit_mcp_server` (~142 tokens)

Audit an MCP server for tool poisoning

Check an MCP server for tool poisoning before you connect: hidden instructions, secrecy, sensitive-file access, cross-tool shadowing and rug pulls. Pass its URL (its tools are listed read-only, never called) or paste its tools. Optional pinned fingerprints detect changed tools. Costs US$0.01 in USDC on Base; servers that cannot be listed are not charged.

Input parameters:

- `instructions` (string): Server instructions, if pasting
- `pinned` (object): Tool name to fingerprint from a previous audit
- `tools` (array): Or the tools/list result, pasted
- `url` (string): Streamable HTTP endpoint of the MCP server

### `audit_agent_skill` (~155 tokens)

Audit an agent skill or AGENTS.md

Check an agent skill (SKILL.md with its scripts and references) or AGENTS.md, CLAUDE.md, .cursorrules before loading it: prompt injection, curl | bash, encoded commands, credential theft, exfiltration, hardcoded keys, persistence. Paste the files or give one URL. Costs US$0.005 in USDC on Base; nothing is executed.

Input parameters:

- `files` (array): The skill files, e.g. [{path: 'SKILL.md', content: '...'}] (max 50, 256 KB)
- `pinned` (object): Path to fingerprint from a previous audit
- `url` (string): Or a public URL of one raw text file

## Diagnostics

Captured diagnostic sections: Provenance, Vulnerabilities, Dependencies. The full working is on the page: https://verifymcp.io/servers/albertbalestrini-power-strip-security/power-strip-security-mcp#diagnostics

## Score history

- 2026-11-05: 62
- 2026-11-04: 62
- 2026-11-03: 62
- 2026-11-02: 62
- 2026-11-01: 62
- 2026-10-31: 62
- 2026-10-30: 62
- 2026-10-29: 61
- 2026-10-28: 61

## Common questions

### What is the Power Strip Security MCP server?

Power Strip Security is an MCP server listed in the public MCP registry as io.github.AlbertBalestrini/power-strip-security. Prompt-injection shield for agents: read pages, scan content, audit MCP servers and skills. x402. This page covers its npm package (power-strip-security-mcp).

### Is the Power Strip Security MCP server safe to use?

Power Strip Security scores 62 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 Power Strip Security MCP server expose?

Power Strip Security exposes 4 tools: read_url, check_prompt_injection, audit_mcp_server, audit_agent_skill. Their descriptions and schemas cost roughly 487 tokens of context every time the server is loaded.

### Is the Power Strip Security MCP server still maintained?

Power Strip Security 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 Power Strip Security MCP server under?

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

## Links

- npm package: https://www.npmjs.com/package/power-strip-security-mcp
- Socket report: https://socket.dev/npm/package/power-strip-security-mcp
- Website: https://api.powerstripsecurity.workers.dev/
- Changelog RSS feed: https://verifymcp.io/servers/albertbalestrini-power-strip-security/power-strip-security-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/albertbalestrini-power-strip-security/power-strip-security-mcp.json
- HTML version of this page: https://verifymcp.io/servers/albertbalestrini-power-strip-security/power-strip-security-mcp