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Mcp Guardian

rudraneel93/mcp-guardian

If you're running multiple MCP servers in production and need governance over what your AI can actually do, Guardian acts as an intercepting proxy between Claude and your tools. It enforces YAML policy rules to block risky file access, shell commands, or secret leaks before they reach the real servers. You get a web dashboard showing live requests, audit logs, and cost tracking. Version 4.x adds fleet-wide features like cross-agent attack chain detection, threat exchange via MTX format, agent reputation scoring, and compliance evidence generation mapped to SOC2, HIPAA, and ISO frameworks. Install it with npm, run the onboard command to wrap your existing servers, then tune policies as your AI agents trip the rules.

GitHub stars
2
tools
2
auth
Secret needed
transport
STDIO
env vars
3
last updated
May 14, 2026
View on GitHub

Tools

2 tools

Public tool metadata for what this MCP can expose to an agent.

verify_recipeVerify a candidate recipe against a Guardian master recipe. Uses deterministic graph-based verification to check technique, temperature, timing, cooking medium, and required ingredients. Returns a formatted text report. In Oracle Mode (default), proprietary data is protected —...4 params

Verify a candidate recipe against a Guardian master recipe. Uses deterministic graph-based verification to check technique, temperature, timing, cooking medium, and required ingredients. Returns a formatted text report. In Oracle Mode (default), proprietary data is protected —...

Parameters* required
candidate_jsonvalue
The full candidate recipe as a JSON string or object. Expected schema: {"title": "<string>", "cuisine": "<string>", "serves": <int>, "ingredients": [{"name": "<string>", "quantity": "<string>"}], "...default:
dishvalue
Alias for dish_name — for backward compatibility with production clients.
dish_namestring
Name of the dish to verify against (e.g. 'carbonara', 'rendang', 'roast-chicken', 'confit', 'cheesecake', 'kung-pao', 'fried-chicken', 'brisket', 'wellington', 'cheese-souffle'). Use list_dishes()...default:
original_promptvalue
REQUIRED for useful results. Include the user's original cooking request for personalized feedback. Copy the user's exact message that triggered this recipe (e.g., 'Make me a spicy vegan rendang' o...
list_dishesList all available dish slugs from the Guardian registry. Returns: Dictionary with canonical dish slugs and their aliases.1 params

List all available dish slugs from the Guardian registry. Returns: Dictionary with canonical dish slugs and their aliases.

Parameters* required
cuisine_filterstring
Optional cuisine or region to filter by (e.g., 'french', 'chinese', 'italian', 'thai'). Leave empty to return all available dishes.default:

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Configuration

MCP_GUARDIAN_DB_PATHdefault: ~/.mcp-guardian/history.db

Path to SQLite history database

ALERT_WEBHOOK_URLsecret

Slack or Discord webhook for critical alerts

METRICS_ENABLED

Expose Prometheus metrics

Readme

MCP Guardian

A safety layer between your AI assistant and the tools it uses.

View the full README on GitHub

Details

Repository
github.com/rudraneel93/mcp-guardian
Categories
Cloud & Infrastructure, Security & Pentesting
Package
@mcp-guardian/server
Transport
STDIO
Auth
Required
Registry
MCP registry, active

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