How do I install GuardianShield?

Copy the stdio config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does GuardianShield need an API key?

The publisher lists these environment variables: GUARDIANSHIELD_PROFILE, GUARDIANSHIELD_AUDIT_PATH, GUARDIANSHIELD_DEBUG.

What transport does GuardianShield use?

GuardianShield runs locally over stdio.

When was GuardianShield last checked?

Last checked 2026-11-10. AI security layer: code scanning, PII detection, prompt injection, secrets, CVEs

GuardianShield MCP server

1{2 "mcpServers": {3 "io.github.sparkvibe-io-guardianshield": {4 "command": "uvx",5 "args": [6 "guardianshield==1.2.1"7 ],8 "env": {9 "GUARDIANSHIELD_PROFILE": "<value>",10 "GUARDIANSHIELD_AUDIT_PATH": "<value>",11 "GUARDIANSHIELD_DEBUG": "<value>"12 }13 }14 }15}

GuardianShield

Universal AI security layer — an open-source MCP server for code scanning, PII detection, prompt injection defense, secret detection, dependency auditing, and audit logging.

Zero dependencies · 27 MCP tools · 5 safety profiles · 108+ detection patterns

Features

Code Vulnerability Scanning — SQL injection, XSS, command injection, path traversal with CWE IDs and auto-fix remediation
Cross-line Data Flow Analysis — DeepEngine tracks tainted data from sources to sinks across multiple lines using AST-based taint propagation (Python) and regex (JS/TS)
Dependency Security — Version-aware CVE matching against OSV.dev for PyPI, npm, Go, and Packagist ecosystems
Manifest Parsing — Auto-detects 11 formats (requirements.txt, package.json, yarn.lock, go.mod, composer.json, and more)
Prompt Injection Defense — 9+ detection patterns for instruction override, role hijacking, ChatML injection
PII Detection — Email, SSN, credit card, phone, IP — with automatic redaction in findings
Secret Detection — AWS keys, GitHub tokens, Stripe keys, JWTs, passwords, connection strings
Safety Profiles — 5 built-in profiles (general, education, healthcare, finance, children)
Audit Logging — SQLite-backed scan history with finding retrieval and filtering

Install

pip install guardianshield

Quick Start

# Register with Claude Code
claude mcp add guardianshield -- guardianshield-mcp

# Or run directly
guardianshield-mcp

Editor Integration

# Claude Code
claude mcp add guardianshield -- guardianshield-mcp

# VS Code (.vscode/mcp.json)
{"servers": {"guardianshield": {"type": "stdio", "command": "guardianshield-mcp"}}}

# Cursor (.cursor/mcp.json)
{"mcpServers": {"guardianshield": {"command": "guardianshield-mcp"}}}

# Claude Desktop (claude_desktop_config.json)
{"mcpServers": {"guardianshield": {"command": "guardianshield-mcp"}}}

MCP Tools

Scanning

Tool	Description
`scan_code`	Scan source code for vulnerabilities and hardcoded secrets
`scan_file`	Scan a single file (auto-detects language from extension)
`scan_directory`	Recursively scan a directory with filtering and progress streaming
`scan_input`	Check user/agent input for prompt injection attempts
`scan_output`	Check AI output for PII leaks and content violations
`check_secrets`	Detect hardcoded secrets and credentials
`scan_files`	Scan multiple files in one call
`scan_diff`	Parse unified diff and scan only added lines

Dependency Security

Tool	Description
`check_dependencies`	Check packages for known CVEs via OSV.dev (PyPI, npm, Go, Packagist)
`sync_vulnerabilities`	Sync the local OSV vulnerability database
`parse_manifest`	Parse any supported manifest file (11 formats) into dependency objects
`scan_dependencies`	Scan a directory for manifest files and check all deps for vulnerabilities

False Positive Management

Tool	Description
`mark_false_positive`	Mark a finding as false positive (flags future matches)
`list_false_positives`	List active false positive records with optional filter
`unmark_false_positive`	Remove a false positive record by fingerprint

Engine Management

Tool	Description
`list_engines`	List available analysis engines with capabilities
`set_engine`	Set active analysis engines for code scanning

Three engines ship built-in: regex (line-by-line pattern matching, enabled by default), deep (cross-line taint tracking), and semantic (structure-aware confidence adjustment).

CI & Developer Workflow

Tool	Description
`export_sarif`	Export findings as SARIF 2.1.0 JSON for GitHub Code Scanning and CI
`save_baseline`	Save current findings as a baseline for delta scanning
`scan_with_baseline`	Scan code and report only new findings vs. baseline
`check_quality_gate`	Evaluate findings against severity thresholds (pass/fail/warn)
`scan_files`	Scan multiple files in one call
`scan_diff`	Parse unified diff and scan only added lines

Configuration & Utilities

Tool	Description
`get_profile`	Get current safety profile configuration
`set_profile`	Switch safety profile (general, education, healthcare, finance, children)
`test_pattern`	Test a regex pattern against sample code for custom pattern development
`audit_log`	Query the security audit log
`get_findings`	Retrieve past findings with filters
`shield_status`	Get health, configuration, and OSV cache statistics

Configuration

Set environment variables to customize behavior:

Variable	Description	Default
`GUARDIANSHIELD_PROFILE`	Default safety profile	`general`
`GUARDIANSHIELD_AUDIT_PATH`	Path to SQLite audit database	`~/.guardianshield/audit.db`
`GUARDIANSHIELD_DEBUG`	Enable debug logging (`1`)	disabled

Documentation

Full documentation: sparkvibe-io.github.io/GuardianShield

License

Apache 2.0

GuardianShield

Add this server

Host a copy with our keys and logs.

Server facts

Tools

Questions

How do I install GuardianShield?

Does GuardianShield need an API key?

What transport does GuardianShield use?

When was GuardianShield last checked?

Documentation

GuardianShield

Features

Install

Quick Start

Editor Integration

MCP Tools

Scanning

Dependency Security

False Positive Management

Engine Management

CI & Developer Workflow

Configuration & Utilities

Configuration

Documentation

License