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Policy MCP Server

@TangoIndiaPapa

Repository

Basic information

Category

Other

License

MIT license

Transports

stdio

Author

TangoIndiaPapa

About Policy MCP Server

Model Context Protocol Server using FastMCP 2.0 to enforce policies

Policy MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "policy-mcp-server": {
      "command": "uv",
      "args": [
        "venv",
        ".venv"
      ]
    }
  }
}

Policy MCP Server tools

Tool list not available yet

This listing does not currently have a tool list to display. This does not mean the server has no tools; check its documentation for supported capabilities.

We auto-extract tools from the README. The maintainer can list them under a ## Tools heading to populate this section.

Overview

What is Policy MCP Server?

A Model Context Protocol (MCP) server built with FastMCP that enforces policies via Open Policy Agent (OPA). It integrates OPA’s REST API for decision-making and is designed for AI agents or MCP-compatible clients needing compliance checks.

How to use Policy MCP Server?

Install dependencies with uv, copy .env.example to .env, then run python src/server.py. Configure it as an MCP server in VS Code settings or launch with Docker Compose for OPA. The tool enforce_policy_opa checks whether an action complies with policies defined in Rego.

Key features of Policy MCP Server

  • FastMCP compliant and modular architecture
  • Policy enforcement via OPA REST API
  • Rego‑based policy files and data
  • Easy to extend with new tools
  • XAI‑compliant and secure by design
  • Supports Docker, Dev Container, and VS Code

Use cases of Policy MCP Server

  • Enforce content policies on LLM‑generated prompts
  • Validate agent actions against organizational rules
  • Test policy rules interactively via MCP chat
  • Integrate compliance checks into AI agent workflows

Frequently asked questions

1

How do I set up OPA?

Run `docker compose -f docker-compose-opa.yaml up -d` after creating a Docker network. OPA listens on port 8181 and loads policies from `config/policy.rego` and `config/policy.json`.

2

How do I configure the server for VS Code?

Add the server to your VS Code `settings.json` under `

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