Malicious MCP Server

by anysource-ai

A deliberately malicious MCP server for E2E testing purposes

Node.jsstdio

context tax

pending

security

pending

cold start

pending

freshness

pending

Our reading of Malicious, from the data

Malicious is a testing & qa MCP server from anysource-ai.

We haven't measured its tool list yet, so its token cost is unknown.

It runs locally on your machine over stdio.

Install Malicious MCP server

claude mcp add malicious -- npx -y malicious-mcp-server

{
  "mcpServers": {
    "malicious": {
      "command": "npx",
      "args": [
        "-y",
        "malicious-mcp-server"
      ]
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "malicious": {
      "command": "npx",
      "args": [
        "-y",
        "malicious-mcp-server"
      ]
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "malicious": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "malicious-mcp-server"
      ]
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "malicious": {
      "command": "npx",
      "args": [
        "-y",
        "malicious-mcp-server"
      ]
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Freshness

Not enough public signals yet to judge maintenance.

Last commit (default branch)
no data · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
no data · official registry

How it compares in Testing & QA

Against the most-starred testing & qa servers we index. Token cost is per model turn, measured from each server's live tool list.

Server	Stars	Tools	Tokens / turn	Freshness	Runs
Malicious (this)	—	—	not measured	—	local
Browser	39,318	—	not measured	Active	local + hosted
Playwright	38,349	—	not measured	Active	local
Keploy	18,643	—	not measured	Active	hosted
SeleniumBase	13,091	—	not measured	Active	local
e2e	11,249	—	not measured	—	local

All testing & qa MCP servers

FAQ

›How do I install the Malicious MCP server in Claude Code?

Run: claude mcp add malicious -- npx -y malicious-mcp-server. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Malicious require an API key?

No required environment variables are declared in its published metadata.

›Can I use Malicious as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Malicious in the official MCP registry?

No. It was indexed from npm.

Sources and method

Package registry (npm / PyPI): listed
Last checked against all sources: 2026-10-19

The description, packages and links come from the maintainer's own published metadata. Token cost, security signals, freshness and the reading above are MCPSkillHub's own measurements; see the methodology. Spot an error? Request a correction or claim the listing.