Is io.github.OrygnsCode/opa-mcp safe to use?

io.github.OrygnsCode/opa-mcp has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments. Licensed under MIT.

How do I install io.github.OrygnsCode/opa-mcp?

io.github.OrygnsCode/opa-mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.

What can io.github.OrygnsCode/opa-mcp do?

io.github.OrygnsCode/opa-mcp provides 6 tools: rego_eval, rego_explain_decision, rego_generate_test_skeleton, rego_describe_policy, rego_suggest_fix and 1 more. See the full tools list on the server page for descriptions and parameters.

What AI clients work with io.github.OrygnsCode/opa-mcp?

io.github.OrygnsCode/opa-mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.

Is io.github.OrygnsCode/opa-mcp actively maintained?

io.github.OrygnsCode/opa-mcp is actively maintained — last commit was 1 day ago. It has 7 GitHub stars.

io.github.OrygnsCode/opa-mcp

@orygn/opa-mcp

Author, validate, debug, and explain OPA Rego policies through any MCP-compatible client.

7 189/wk 6 tools GitHub npm

No known CVEs

MIT license

Actively maintained

Last commit 1d ago

Works with most clients

Transport: stdio, sse, http

6 tools · ~319 tok

Grade A · 0.2% of 200K ctx

MCPpedia last refreshed this data 9h ago

Edit this pageView history

io.github.OrygnsCode/opa-mcp is an MCP server that author, validate, debug, and explain OPA Rego policies through any MCP-compatible client. Its tool list has not been published yet over stdio, sse and http, requires no API key, and scores 89/100 on MCPpedia's security, maintenance and efficiency rubric.

Other

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio, sse, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "opa": {
      "env": {
        "OPA_URL": "http://localhost:8181",
        "OPA_BINARY": "/usr/local/bin/opa",
        "REGAL_BINARY": "/usr/local/bin/regal",
        "OPA_MCP_ALLOWED_PATHS": "/path/to/your/policies"
      },
      "args": [
        "-y",
        "@orygn/opa-mcp"
      ],
      "command": "npx"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-orygnscode-opa-mcp)](https://mcppedia.org/s/io-github-orygnscode-opa-mcp)

Read me

What io.github.OrygnsCode/opa-mcp does

A Model Context Protocol (MCP) server that turns any MCP-compatible client (Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed, and others) into a first-class Open Policy Agent and Rego authoring

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked — your result helps other developers.

npx -y '@orygn/opa-mcp' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

89/100across 5 weighted dimensions

How we score →

0255075100

−11

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked @orygn/opa-mcp against OSV.dev.

Inventory

Tools (6)

Click any tool to inspect its schema.

~319 tokens total

Inventory

Resources (3)

OPA Built-in Functions

Catalog of OPA built-in functions

opa://builtins

Rego Style Guide

Official Rego style guide formatted for LLMs

opa://style-guide

Pattern Library

Curated pattern library covering RBAC, ABAC, Kubernetes admission, IaC gates, API authz, and rate limiting

opa://patterns

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.OrygnsCode/opa-mcp safe to use?: io.github.OrygnsCode/opa-mcp has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments. Licensed under MIT.
How do I install io.github.OrygnsCode/opa-mcp?: io.github.OrygnsCode/opa-mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can io.github.OrygnsCode/opa-mcp do?: io.github.OrygnsCode/opa-mcp provides 6 tools: rego_eval, rego_explain_decision, rego_generate_test_skeleton, rego_describe_policy, rego_suggest_fix and 1 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with io.github.OrygnsCode/opa-mcp?: io.github.OrygnsCode/opa-mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.
Is io.github.OrygnsCode/opa-mcp actively maintained?: io.github.OrygnsCode/opa-mcp is actively maintained — last commit was 1 day ago. It has 7 GitHub stars.

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Community

Discussion

Start a conversation

Ask a question, share a tip, or report an issue.

Has anyone used this with Cursor?How do you handle auth?Any alternatives?

Edit this pageView history

Other

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio, sse, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "opa": {
      "env": {
        "OPA_URL": "http://localhost:8181",
        "OPA_BINARY": "/usr/local/bin/opa",
        "REGAL_BINARY": "/usr/local/bin/regal",
        "OPA_MCP_ALLOWED_PATHS": "/path/to/your/policies"
      },
      "args": [
        "-y",
        "@orygn/opa-mcp"
      ],
      "command": "npx"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-orygnscode-opa-mcp)](https://mcppedia.org/s/io-github-orygnscode-opa-mcp)

Read me

What io.github.OrygnsCode/opa-mcp does

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked — your result helps other developers.

npx -y '@orygn/opa-mcp' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

README

OPA MCP Server

+--------------------+ MCP/stdio  +-----------------+ spawn/HTTP +---------------------+
|  Claude · Cursor · |----------> | @orygn/opa-mcp  |----------> | opa · regal         |
|   VS Code · ...    |<---------- |                 |<---------- | conftest · REST API  |
+--------------------+  52 tools  +-----------------+            +---------------------+

Status: v0.3.0. Tool surface, error codes, and environment variables follow SemVer from v0.1.0 forward.

Upgrading to 0.3.0: the bundled OPA is now 1.19, so Rego v0 policies no longer parse (if is required before a rule body, contains before a partial set). Run rego_migrate_v1 to convert them. If you supply your own binary via OPA_BINARY or PATH, nothing changes.

What you can do with it
Why this MCP
Install
Configuration
Tool reference
Prompts
Resources
Cookbook
Architecture
Security
Troubleshooting
Development
Versioning & support
License

What you can do with it

Once an MCP client is connected, an agent can:

Author Rego. Generate, format, and refactor policies. The server runs the real opa fmt and opa parse so output is byte-identical to what you'd get on the command line, and regal (optional) surfaces idiomatic suggestions.
Evaluate against data. Run a query against a policy and an input document. Optional --explain, --profile, and --coverage flags surface execution traces, hot rules, and per-line coverage.
Debug a deny. rego_explain_decision walks the agent through every rule that fired (and every one that didn't), so it can answer "why was this rejected" without you reading the trace by hand.
Manage policies on a running OPA. List, get, put, delete policies on an OPA server through its REST API. Works against a local opa run --server or a production deployment with bearer-token auth.
Build & sign bundles. Package a directory of policies into a deployable bundle, optionally signing it. Output is a regular .tar.gz the agent can hand to your delivery system.
Lint. rego_lint runs Regal across a directory or a single file and returns categorized findings (style, bugs, performance, idioms).

A walk-through of a typical session lives in Cookbook.

Why this MCP

OPA already has a perfectly good CLI and REST API. So why an MCP wrapper?

**Sc

... View full README on GitHub

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

89/100across 5 weighted dimensions

How we score →

0255075100

−11

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked @orygn/opa-mcp against OSV.dev.

Inventory

Tools (6)

Click any tool to inspect its schema.

~319 tokens total

Inventory

Resources (3)

OPA Built-in Functions

Catalog of OPA built-in functions

opa://builtins

Rego Style Guide

Official Rego style guide formatted for LLMs

opa://style-guide

Pattern Library

Curated pattern library covering RBAC, ABAC, Kubernetes admission, IaC gates, API authz, and rate limiting

opa://patterns

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.OrygnsCode/opa-mcp safe to use?: io.github.OrygnsCode/opa-mcp has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments. Licensed under MIT.
How do I install io.github.OrygnsCode/opa-mcp?: io.github.OrygnsCode/opa-mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can io.github.OrygnsCode/opa-mcp do?: io.github.OrygnsCode/opa-mcp provides 6 tools: rego_eval, rego_explain_decision, rego_generate_test_skeleton, rego_describe_policy, rego_suggest_fix and 1 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with io.github.OrygnsCode/opa-mcp?: io.github.OrygnsCode/opa-mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.
Is io.github.OrygnsCode/opa-mcp actively maintained?: io.github.OrygnsCode/opa-mcp is actively maintained — last commit was 1 day ago. It has 7 GitHub stars.

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Others in other

View all →

Headroom95

Compress tool outputs, logs, files, and RAG chunks before they reach the LLM. 60-95% fewer tokens, same answers. Library, proxy, MCP server.

67.3k 3

Transport Stdio95

Transport for TMCP using STDIO

197 14

Flare95

The graph based agentic IDE

139 3

app.fojin/fojin-mcp94

Buddhist canon tools: search, passages, cross-canon parallels, dictionaries — all URN-cited.

330 8

MCP Security Weekly

Get CVE alerts and security updates for io.github.OrygnsCode/opa-mcp and similar servers.

Community

Discussion

Start a conversation

Ask a question, share a tip, or report an issue.

Has anyone used this with Cursor?How do you handle auth?Any alternatives?

io.github.OrygnsCode/opa-mcp

Install in your client

What io.github.OrygnsCode/opa-mcp does

Test This Server

Why this score

89/100across 5 weighted dimensions

Security

Tools (6)

Resources (3)

Reviews

Frequently Asked Questions

Similar servers

Discussion

io.github.OrygnsCode/opa-mcp

Install in your client

What io.github.OrygnsCode/opa-mcp does

Test This Server

OPA MCP Server

Table of contents

What you can do with it

Why this MCP

Why this score

89/100across 5 weighted dimensions

Security

Tools (6)

Resources (3)

Reviews

Frequently Asked Questions

Similar servers

Discussion

OPA MCP Server

Table of contents

What you can do with it

Why this MCP