x402-prompt-injection-scan

MCP server · npm · graded 2026-10-30Source linked

Prompt-injection scanner for AI agents: deterministic, documented rules (instruction override, jailbreaks, exfiltration URLs, tool hijack/MCP tool poisoning, hidden Unicode, encoded payloads) returning a risk score, categories and spans. Library + x402 pa

1 incident, 1 advisory on file

x402-prompt-injection-review is distributed via npm (x402-prompt-injection-review); review its source code, dependencies, and requested permissions before use.

Based on public adoption and transparency signals as of Oct 30, 2026. Our opinion, not a code audit or security guarantee.

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What it can access

Local filesNo local folder access notedLOW
Command executionNo shell command runner notedLOW
Network reachLocal or standard API callsLOW
CredentialsNo API token requiredLOW
Package sourcenpm (x402-prompt-injection-scan)PUBLIC

Inferred from this listing’s public package details and description. Check the project’s source before installing.

Install

npx -y x402-prompt-injection-scan

All setup options ↓

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Everything known

1 critical incident and 1 critical advisory on record. The newest is from 2026-10-22. None lists a fixed version.

1 incident · 1 advisory · 0 news articles · 0 community threads · checked 2026-10-30

Popularity grade: F (from public signals such as stars and downloads, not a code review). Graded 2026-10-30.

All (2)Incidents (1)Advisories (1)

Showing all 2Showing 1 incident of 2Showing 1 advisory of 2

IncidentMalicious code in x402-prompt-injection-scan (npm)AgentArmorHQ incident library · 2026-10-22 · Severity: Critical
AdvisoryMalware in x402-prompt-injection-scanGitHub Advisory Database · 2026-10-22 · Severity: Critical · Listed as malware by the source

Sources we read: OSV, GitHub Advisory Database, CISA Known Exploited Vulnerabilities, 44 security news feeds and our incident library. Last checked 2026-10-30.

Check a specific version →

About X402 Prompt Injection Scan

X402 Prompt Injection review is an MCP server focused on Developer tools and Files & documents: Prompt-injection review for AI agents: deterministic, documented rules (instruction override, jailbreaks, exfiltration URLs, tool hijack/MCP tool poisoning, hidden Unicode, encoded payloads) returning a risk score, categories and spans. Library + x402 pa.

It is published on npm as x402-prompt-injection-review (581 weekly npm downloads). Based on its public metadata, it operates with standard local or API scope without broad shell execution flags noted.

Setup

These use the package this listing points to. Check the project’s own instructions before running anything.

npm command

npx -y x402-prompt-injection-scan

MCP client config

For Claude Desktop (claude_desktop_config.json) or Cursor (.cursor/mcp.json).

json

{
  "mcpServers": {
    "x402-prompt-injection-scan": {
      "command": "npx",
      "args": [
        "-y",
        "x402-prompt-injection-scan"
      ]
    }
  }
}

Why this grade

FF — Many risk signals

Signal-based grade (0/7 points): no public source code found. This reflects adoption and transparency, not a code review.

Popularity and upkeep

22/100

Weekly npm downloads: 581
Listing last refreshed: 2026-10-30

These are public popularity signals, not a maintenance check. Look at the repository’s commit history and open issues.

Risks to watch for

Dependency & version pinning: Distributed via npm (x402-prompt-injection-scan). Pin an exact release version or commit SHA rather than floating tags so upstream updates are reviewed first.

How to lower the risk

Least-privilege permissions

Give it access only to the specific folders, accounts or projects it needs, never your whole drive or admin account.
Use a separate, limited API key or login just for this tool so you can switch it off without affecting anything else.

Network isolation

Run it on a work computer or sandbox account, not one holding personal or company-sensitive data.
If your IT team can, limit which websites and services it is allowed to contact.

Monitoring

Check its activity history or logs weekly at first, and look at what it changed or sent.
Turn on alerts for new logins or unusual usage on any account it connects to.

Red flags to watch for

It asks for more access than its job requires, or prompts you to paste passwords.
It suddenly updates with new owners, or starts contacting unfamiliar websites.

Questions

How do I install X402 Prompt Injection review?

Run npx -y x402-prompt-injection-review in your terminal, or add the server entry to your claude_desktop_config.json or .cursor/mcp.json as shown in the Setup section on this page.

Are there security reports about X402 Prompt Injection review?

2 reports were found for this package in our research. Titles and dates (AgentArmorHQ incident library, GitHub Advisory Database) are listed in the Reports section above. X402 Prompt Injection review currently holds Grade F (Many risk signals) based on public adoption and transparency signals. Review the permissions and source repository before granting access to local files, shell commands, or API keys.

Is X402 Prompt Injection review actively maintained?

X402 Prompt Injection review has 581 weekly npm downloads. Our directory data was last refreshed on 2026-10-30. Check recent commit activity, release tags, and open issues before pinning it in production.

What are alternatives to X402 Prompt Injection review?

Compare X402 Prompt Injection review side by side with similar MCP servers in the Related tools section on this page, or browse all MCP servers on AgentArmorHQ.

Maintain or use X402 Prompt Injection Scan? Show its live grade in your GitHub README, docs site, or run a check from the terminal before you install.

AgentArmorHQ Risk Grade F for X402 Prompt Injection Scan

GitHub README Markdown:

markdown

[![AgentArmorHQ Risk Grade for X402 Prompt Injection Scan](https://agentarmorhq.com/api/badge/x402-prompt-injection-scan)](https://agentarmorhq.com/skills/x402-prompt-injection-scan)

HTML embed:

html

<a href="https://agentarmorhq.com/skills/x402-prompt-injection-scan"><img src="https://agentarmorhq.com/api/badge/x402-prompt-injection-scan" alt="AgentArmorHQ Risk Grade for X402 Prompt Injection Scan" height="20" /></a>

Terminal check:

terminal

curl -fsSL https://agentarmorhq.com/api/cli | node --input-type=module - check "x402-prompt-injection-scan"

Share with your security lead

Need sign-off to use x402-prompt-injection-scan? Copy this note for Slack, a ticket or a pull request.

### AgentArmorHQ Security Review Memo: x402-prompt-injection-scan
- **Listing URL:** https://agentarmorhq.com/skills/x402-prompt-injection-scan
- **Type:** App connector
- **Risk Grade:** Grade F (Many risk signals)
- **Outside Security Advisories on File:** 2

#### Permission & Blast-Radius Signals
- **Local files:** No local folder access noted
- **Command execution:** No shell command runner noted
- **Network reach:** Local or standard API calls
- **Credentials:** No API token required
- **Package source:** npm (x402-prompt-injection-scan)

#### Recommended Hardened Setup
- **Command:** `npx -y --ignore-scripts x402-prompt-injection-scan`
- **Controls:** Pin an exact version in `.mcp.json`, scope access to a single workspace folder, and use a least-privilege read-only token where supported.

_Based on public adoption and transparency signals as of Oct 30, 2026. Our opinion, not a code audit or security guarantee._

Key facts

Type: App connector
Install command: npm install x402-prompt-injection-scan
Est. context load: ~900 tokens / turn (~5 tool schemas, 0.45% of 200k context)
Popularity: 581 weekly npm downloads
Last updated: 2026-10-30
Last graded: 2026-10-30

Community

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