rein

rein is an MCP server for Claude Code from lyr1cs/rein. Its token cost is not measured, scanned A, original, no licence file.

A server named “rein” that follows the Model Context Protocol (MCP), a standard way for an AI agent to use external tools or data.

In plain words
What is it for?
It is for starting the rein MCP server with the command “rein serve”.
Why use it?
It provides the configured rein service to an agent, although the available description does not say what operations the service supports.

MCP server for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: listed in a Claude config.

Part of the rein plugin — 1 MCP server shipped together

Good fit It is for starting the rein MCP server with the command “rein serve”.

Compare 6 mcp servers from other repositories ↓
Install with agentmods
npx agentmods add mcp/lyr1cs/rein/rein-rein
View source ↗ lyr1cs/rein
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/lyr1cs/rein

Made for: Claude Code.

Or install rein, the plugin that ships this one along with the rest of its 1 MCP server.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for rein

README.md
[![agentmods](https://agentmods.dev/badge/mcp/lyr1cs/rein/rein-rein/github.svg)](https://agentmods.dev/mcp/lyr1cs/rein/rein-rein)
Your own site
<a href="https://agentmods.dev/mcp/lyr1cs/rein/rein-rein"><img src="https://agentmods.dev/badge/mcp/lyr1cs/rein/rein-rein/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for rein

Your own site · 80×15
<a href="https://agentmods.dev/mcp/lyr1cs/rein/rein-rein"><img src="https://agentmods.dev/badge/mcp/lyr1cs/rein/rein-rein.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Security

Grade A, and why

rein scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/rein/.mcp.json · 8 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 11d ago First seen · 8 lines scan A b605e69545fb

Subscribe to this mod's changes

rein is an MCP server published in the GitHub repository lyr1cs/rein (9 stars, last pushed 5d ago), with no licence file. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.