Agent Security MCP Server - Prompt injection detection, secret scanning, permission | MCP Marketplace

Agent Security MCP Server

by Mdfifty50 Boop

SecurityUse Caution4.2MCP RegistryLocal

Free

Server data from the Official MCP Registry

Prompt injection detection, secret scanning, permission auditing

About

Prompt injection detection, secret scanning, permission auditing

Security Report

4.2

Use Caution4.2High Risk

This is a legitimate security-focused MCP server with well-intentioned functionality for scanning, auditing, and detecting security issues in agent workflows. The codebase is clean with proper input validation via Zod schemas and no malicious patterns. However, there are moderate concerns around incomplete secret masking in output, some edge cases in injection pattern detection, and minor error handling gaps that prevent a higher score. The server's permissions are appropriate for its security auditing purpose. Supply chain analysis found 3 known vulnerabilities in dependencies (0 critical, 3 high severity). Package verification found 1 issue.

7 files analyzed · 10 issues found

Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.

Permissions Required

This plugin requests these system permissions. Most are normal for its category.

env_vars

Check that this permission is expected for this type of plugin.

file_system

Check that this permission is expected for this type of plugin.

How to Install

Add this to your MCP configuration file:

{
  "mcpServers": {
    "io-github-mdfifty50-boop-agent-security": {
      "args": [
        "-y",
        "agent-security-mcp"
      ],
      "command": "npx"
    }
  }
}

Documentation

From the project's GitHub README.

Agent Security MCP Server

Security scanning, prompt injection detection, secret leak detection, and agent permission auditing for AI agent workflows. Built on the Model Context Protocol (MCP).

Tools

Tool	Description
`scan_mcp_config`	Scan MCP server configurations for security issues (dangerous commands, exposed secrets, network exposure, container misconfigs)
`detect_prompt_injection`	Analyze text for prompt injection attempts across 7 attack categories with context-aware risk scoring
`validate_scope_contract`	Check if agent actions comply with scope contracts (tool allowlists, file access, boundary constraints)
`scan_secrets`	Detect leaked API keys, tokens, private keys, database URIs, and credentials in text or code
`audit_agent_permissions`	Audit agent configurations against role-based expectations and flag principle of least privilege violations
`generate_security_report`	Generate comprehensive security assessment reports with prioritized remediation plans
`detect_tool_poisoning`	Analyze MCP tool definitions for hidden instructions that could manipulate agent behavior (OWASP Agentic Top 10)

Resources

Resource	URI	Description
OWASP LLM Top 10	`security://owasp-llm-top10`	OWASP Top 10 for LLM Applications (2025)
MCP Security Checklist	`security://mcp-security-checklist`	Security checklist for MCP server deployments

Installation

cd agent-security-mcp
npm install

Usage

As a standalone server

npm start

In Claude Desktop / MCP client configuration

{
  "mcpServers": {
    "agent-security": {
      "command": "node",
      "args": ["/path/to/agent-security-mcp/src/index.js"]
    }
  }
}

With npx (after publishing)

{
  "mcpServers": {
    "agent-security": {
      "command": "npx",
      "args": ["@asl-throne/agent-security-mcp"]
    }
  }
}

Detection Coverage

Prompt Injection (7 categories, 20+ patterns)

Instruction Override -- "ignore previous instructions", "disregard all rules", "new instructions:"
Identity Manipulation -- "you are now", "pretend you are", "act as", DAN/jailbreak
System Prompt Extraction -- "repeat your system prompt", "show your instructions"
Data Exfiltration -- "send this to", "post to webhook", "email everything to"
Delimiter Attacks -- ```system, [INST], <|im_start|>system, XML tag injection
Encoded Injection -- Base64 payloads, unicode zero-width characters, hex escapes
Privilege Escalation -- "sudo mode", "disable safety", "bypass filters"

Secret Detection (25+ patterns)

AI Provider Keys -- OpenAI (sk-), Anthropic (sk-ant-)
Cloud Credentials -- AWS (AKIA*), GCP (AIza*), Azure connection strings
Source Control -- GitHub PATs (ghp_, github_pat_), OAuth tokens (gho_*)
Payment -- Stripe live/test keys (sk_live_, sk_test_)
Communication -- Slack tokens/webhooks, Telegram bot tokens
Database -- PostgreSQL, MongoDB, MySQL, Redis connection URIs
Cryptographic -- RSA/EC/OpenSSH private keys, generic PEM blocks
JWT -- JSON Web Tokens
Generic -- api_key=, secret=, password=, .env file patterns

Permission Audit (6 role profiles)

Researcher -- Read + search + web only
Analyst -- Read + search only
Developer -- Read + write + execute
Reviewer -- Read only, no network
Orchestrator -- Read + write + task spawning
Monitor -- Read only, no network, no write

Pricing

Plan	Price	Servers	Features
Free	$0	1 server	Single scan, basic report
Starter	$49/month	3 servers	Continuous scanning, weekly reports
Pro	$199/month	20 servers	Real-time alerts, CI/CD integration, Slack notifications
Enterprise	$799/month	Unlimited	Custom policies, EU AI Act compliance reporting, SSO, dedicated support

Requirements

Node.js >= 18.0.0
@modelcontextprotocol/sdk >= 1.12.0

License

MIT

Reviews

No reviews yet

Be the first to review this server!

More Security MCP Servers

Toleno

by Toleno · Developer Tools

Toleno Network MCP Server — Manage your Toleno mining account with Claude AI using natural language.

mcp-creator-python

by mcp-marketplace · Developer Tools

Create, build, and publish Python MCP servers to PyPI — conversationally.

MarkItDown

by Microsoft · Content & Media

Convert files (PDF, Word, Excel, images, audio) to Markdown for LLM consumption