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Rein MCP Server

by bugiiiii11 Your server? Claim it
local only

Rein runs on your own machine — the client starts it, so there is no endpoint to ping. 583 installs a week from npm. Last commit 10 Oct 2026.

Spend limits for AI agents that pay with x402: every paywall is policy-checked before a cent moves.

Installs per day peak 216 · avg 46 · +9% w/w
a month agotoday
583
Installs / week
npm · @reinconsole/mcp
0
Stars
0 open issues
10 Oct 2026
Last commit
8 releases in 90 days
MIT
License
TypeScript

What the code does

We read the source, 1 d ago · rules ccca72095570

In the project's build, not in the package

Found in continuous integration, deployment or infrastructure files, or in a neighbouring package of the same monorepo. None of this is installed when you add the server: it describes how the project is built and released. We list it because a leaked key in a build pipeline is still a real problem, but it is not something this server does on your machine.

  const proc = spawn(process.execPath, [BIN], {
Sends data to a third-party sink services/policy-engine/src/channels.ts:226
    this.apiBase = (options.apiBase ?? 'https://api.telegram.org').replace(/\/+$/, '');
Long encoded blob in source services/policy-engine/src/geo-data.ts:11
    v4: '394a6e00394a6fff59ee9b0059ee9bff8a103d008a103dff95122900951229ff98ce000098ce4b1f98ce4c0098ce5d9f98ce5e0098ceb01798ceb10098cec8f398cec90098cf15df98cf160098cf2e0798cf2e9898cf471398cf480098cf643f98cf650098cfeb5398cfebf898cffccb98cffd0098cfff179eaddb009eaddbffa8710d00a8710df…
Dumps the whole environment services/store/src/engine-e2e.ts:147
    Object.entries(process.env).filter(([key]) => !key.startsWith('REIN_')),

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

Nothing serious here today

Today is the operative word: we check Rein every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Three servers free · no card

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

run in your terminal
claude mcp add rein -- npx -y @reinconsole/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "rein": {
      "args": [
        "-y",
        "@reinconsole/mcp"
      ],
      "command": "npx"
    }
  }
}
~/.codex/config.toml
[mcp_servers.rein]
command = "npx"
args = ["-y", "@reinconsole/mcp"]
.cursor/mcp.json
{
  "mcpServers": {
    "rein": {
      "args": [
        "-y",
        "@reinconsole/mcp"
      ],
      "command": "npx"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "rein": {
      "args": [
        "-y",
        "@reinconsole/mcp"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: REIN_AGENT_FILE (Path to the rein-agent.json written by `npx @reinconsole/init` (engine URL, agent id, API key, wallet).), REIN_ENGINE_URL (Policy engine base URL. Required unless REIN_AGENT_FILE is set.), REIN_AGENT_ID (The one agent this server speaks for. Required unless REIN_AGENT_FILE is set.), REIN_ENGINE_API_KEY (Bearer key for the engine, ideally an evaluate key narrowed to this agent.), REIN_PAYER_PRIVATE_KEY (Agent wallet key. Omit for advisory mode: policy is checked, nothing is paid.), REIN_NETWORK_PROFILE (testnet (default) or mainnet: which network's 402s this server will pay.). The author declared them in the registry entry; get the values from the project itself.

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I
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Rein — questions

Answers built from our own checks of this server.

Why is there no uptime for Rein?
Rein runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package @reinconsole/mcp was installed 583 times last week.
How do I connect Rein?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls @reinconsole/mcp straight from npm; nothing to host, nothing to sign up for.
How many people use Rein?
The npm package @reinconsole/mcp was installed 583 times in the last week. Week over week that is +9%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Rein open source?
Yes — it is published under the MIT licence, written in TypeScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.