Cerbos (Access Control) MCP Server with 19 Tools for Claude, Cursor, and AI Agents

Connect your Cerbos instance to any AI agent to streamline authorization management and policy auditing through natural language.

What you can do

• Permission Checks — Use check_resources to evaluate if a principal (user) has the rights to perform specific actions on resources.
• Query Planning — Generate AST query plans with plan_resources to filter database results based on complex authorization logic.
• Policy Management — List, retrieve, add, or delete policies (RBAC/ABAC) using the Admin API tools like list_policies and add_policy.
• Schema & Auditing — Inspect resource schemas and review access logs with list_auditLogs to ensure compliance.
• Health & Metrics — Monitor your PDP (Policy Decision Point) status with get_health and get_metrics directly from the chat.

How it works

1. Subscribe to this server
2. Enter your Cerbos PDP URL and Admin credentials (if required for policy management)
3. Start auditing and managing your access control logic from Claude, Cursor, or any MCP client

Who is this for?

• Security Engineers — quickly audit existing policies and verify permission logic without manual API calls
• Backend Developers — test authorization scenarios and generate database filter plans during development
• Compliance Officers — retrieve audit logs and policy definitions to ensure organizational security standards