GuardianShield

io.github.sparkvibe-ioPublished by GitHub account sparkvibe-iov1.2.1Updated Oct 24, 2026

AI security layer: code scanning, PII detection, prompt injection, secrets, CVEs

VerifiedSTDIODesktop onlyDeveloper ToolsSecurity & Monitoring

Overview

AI-generated overview

Local MCP server that gives an assistant security scanning: code vulnerabilities, secrets, PII, prompt injection and dependency CVEs, with audit logging.

What you can do
  • Scan code, files, directories, diffs and multiple files for vulnerabilities and hardcoded secrets
  • Check user input for prompt injection and AI output for PII leaks and content violations
  • Parse manifests and check dependencies for known CVEs via OSV.dev, and sync the local vulnerability database
  • Manage false positives and choose analysis engines (regex, deep taint tracking, semantic)
  • Export SARIF, save baselines, run delta scans and evaluate quality gates for CI
  • Switch safety profiles and query the audit log, past findings and server status
When to use it
Useful when an assistant reviews or writes code and you want it to flag injection flaws, leaked credentials, PII or vulnerable dependencies, and when you need repeatable CI checks with baselines, SARIF export and quality gates.
Requirements
Runs locally over stdio as the PyPI package guardianshield (installed with pip, started as guardianshield-mcp). Optional environment variables GUARDIANSHIELD_PROFILE, GUARDIANSHIELD_AUDIT_PATH and GUARDIANSHIELD_DEBUG. Dependency checks contact OSV.dev, so network access is needed for CVE lookups.
Before you install
Scanned code, findings and audit history are written to a local SQLite database at the path in GUARDIANSHIELD_AUDIT_PATH, so point it somewhere appropriate. Dependency checks send package names and versions to OSV.dev. Findings may contain sensitive snippets, and false-positive records and baselines persist and affect later scans.

Installation

In SourceWeft

  1. Open GuardianShield in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

GuardianShield

[PyPI version] [Python] [License] [Tests]

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

bash
pip install guardianshield

Quick Start

bash
# Register with Claude Codeclaude mcp add guardianshield -- guardianshield-mcp
# Or run directlyguardianshield-mcp

Editor Integration

bash
# Claude Codeclaude 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

ToolDescription
scan_codeScan source code for vulnerabilities and hardcoded secrets
scan_fileScan a single file (auto-detects language from extension)
scan_directoryRecursively scan a directory with filtering and progress streaming
scan_inputCheck user/agent input for prompt injection attempts
scan_outputCheck AI output for PII leaks and content violations
check_secretsDetect hardcoded secrets and credentials
scan_filesScan multiple files in one call
scan_diffParse unified diff and scan only added lines

Dependency Security

ToolDescription
check_dependenciesCheck packages for known CVEs via OSV.dev (PyPI, npm, Go, Packagist)
sync_vulnerabilitiesSync the local OSV vulnerability database
parse_manifestParse any supported manifest file (11 formats) into dependency objects
scan_dependenciesScan a directory for manifest files and check all deps for vulnerabilities

False Positive Management

ToolDescription
mark_false_positiveMark a finding as false positive (flags future matches)
list_false_positivesList active false positive records with optional filter
unmark_false_positiveRemove a false positive record by fingerprint

Engine Management

ToolDescription
list_enginesList available analysis engines with capabilities
set_engineSet 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

ToolDescription
export_sarifExport findings as SARIF 2.1.0 JSON for GitHub Code Scanning and CI
save_baselineSave current findings as a baseline for delta scanning
scan_with_baselineScan code and report only new findings vs. baseline
check_quality_gateEvaluate findings against severity thresholds (pass/fail/warn)
scan_filesScan multiple files in one call
scan_diffParse unified diff and scan only added lines

Configuration & Utilities

ToolDescription
get_profileGet current safety profile configuration
set_profileSwitch safety profile (general, education, healthcare, finance, children)
test_patternTest a regex pattern against sample code for custom pattern development
audit_logQuery the security audit log
get_findingsRetrieve past findings with filters
shield_statusGet health, configuration, and OSV cache statistics

Configuration

Set environment variables to customize behavior:

VariableDescriptionDefault
GUARDIANSHIELD_PROFILEDefault safety profilegeneral
GUARDIANSHIELD_AUDIT_PATHPath to SQLite audit database~/.guardianshield/audit.db
GUARDIANSHIELD_DEBUGEnable debug logging (1)disabled

Documentation

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

License

Apache 2.0

Source: README.md at commit 0a80a0e

Tools

0
SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

1
  1. v1.2.1LatestSep 16, 2026

Score

50% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 days25 pts

    Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.

  • Auth declared10 pts

    Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.

  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts