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