Server data from the Official MCP Registry
Deterministic preflight checks for credentials, fund transfers, writes, and prompt overrides.
About
Deterministic preflight checks for credentials, fund transfers, writes, and prompt overrides.
Remote endpoints: streamable-http: https://guardrail-mcp.kadopi.workers.dev/mcp
Security Report
Guardrail MCP is a well-designed, read-only preflight checker with strong security fundamentals. The server implements proper authentication via JSON-RPC, has no dangerous code execution patterns, stores no credentials, and makes no external network calls. Input validation is thorough and appropriately scoped. Minor code quality observations around broad error handling do not impact the security posture. Supply chain analysis found 1 known vulnerability in dependencies (1 critical, 0 high severity).
5 files analyzed · 3 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.
How to Install & Connect
Available as Local & Remote
This plugin can run on your machine or connect to a hosted endpoint. during install.
Documentation
View on GitHubFrom the project's GitHub README.
Guardrail MCP
Small, free, read-only Remote MCP for deterministic action preflight.
It exposes two tools:
get_guardrail_capabilitiesassess_action_risk
The check detects a deliberately small set of high-risk patterns: credential exposure, fund movement, external writes, and instruction overrides. It does not execute an action, persist a request, authenticate a user, charge a payment, call AI, or fetch external URLs.
Local use
npm run check
npm test
npm run dev
Endpoints: GET /, GET /health, and stateless Streamable HTTP POST /mcp.
Boundary
This is an informational deterministic preflight, not a safety guarantee or legal, financial, or security advice. Deployment and any public endpoint require separate approval.
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