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r3 MCP Server

local only

r3 runs on your own machine — the client starts it, so there is no endpoint to ping. 52 installs a week from npm. Last commit 9 Sep 2026.

Local Redis memory MCP for AI apps with hybrid caching and optional Mem0 cloud backup.

Installs per day peak 157 · avg 10 · -59% w/w
a month agotoday
52
Installs / week
npm · @n3wth/r3
2
Stars
1 open issues
9 Sep 2026
Last commit
0 releases in 90 days
MIT
License
TypeScript

What the code does

We read the source, 22 h ago · rules 3dff92dd89df

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Builds a database query by concatenation Dockerfile:5, mcp-server/docker-compose.yml:38
RUN apt-get update && apt-get install -y build-essential make g++ python3 && rm -rf /var/lib/apt/lists/*
Runs an external command src/lib/entity-extractor-spacy.ts:88
      const process = spawn(this.pythonPath, [this.scriptPath, text]);

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

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

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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 r3 -- npx -y @n3wth/r3
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "r3": {
      "args": [
        "-y",
        "@n3wth/r3"
      ],
      "command": "npx"
    }
  }
}
~/.codex/config.toml
[mcp_servers.r3]
command = "npx"
args = ["-y", "@n3wth/r3"]
.cursor/mcp.json
{
  "mcpServers": {
    "r3": {
      "args": [
        "-y",
        "@n3wth/r3"
      ],
      "command": "npx"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "r3": {
      "args": [
        "-y",
        "@n3wth/r3"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: MEM0_API_KEY (Optional Mem0 API key for cloud backup (get free at mem0.ai).), REDIS_URL (Redis connection URL. Uses embedded Redis if unset.). The author declared them in the registry entry; get the values from the project itself.

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r3 — questions

Answers built from our own checks of this server.

Why is there no uptime for r3?
r3 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 @n3wth/r3 was installed 52 times last week.
How do I connect r3?
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 @n3wth/r3 straight from npm; nothing to host, nothing to sign up for.
How many people use r3?
The npm package @n3wth/r3 was installed 52 times in the last week. Week over week that is -59%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is r3 open source?
Yes — it is published under the MIT licence, written in TypeScript, 2 stars on GitHub and 1 open issue. The source link is on this page, so you can read exactly what it does with your data before you connect it.