Magg: The MCP Aggregator Details

Magg is an MCP Aggregator – a meta-MCP server that manages, aggregates, and proxies multiple MCP servers. It acts as a central hub for discovering, configuring, and orchestrating MCP servers, allowing large language models to extend their capabilities at runtime. Magg exposes a suite of tools to search, add, configure, enable/disable, and proxy MCP servers and their tools, merging them under unified prefixes and persisting configurations across sessions. It also includes built-in health and status tools, Real-time Notifications, and MBro (MCP Browser) for interactive exploration, making it easier to compose, manage, and monitor complex MCP ecosystems. Whether you’re running stdio, HTTP, or hybrid transports, Magg provides flexible deployment modes, kit management, and secure access with optional JWT-based authentication.

Use Case

Magg serves as a central MCP registry and proxy layer that lets LLMs dynamically discover, configure, and aggregate MCP servers and their tools. Use Magg to: 1) search for MCP servers and fetch setup instructions; 2) add and configure new MCP servers with per-server prefixes; 3) enable/disable servers on demand; 4) aggregate tools from several servers under a unified namespace; 5) reload configuration from disk and manage kits of servers. The documentation includes concrete usage patterns such as running Magg in different transports, interacting with MBro for exploration, and using Magg’s tools via MCP clients. Example: run Magg in hybrid mode and connect with Claude Code or mbro, then list servers or tools via the MCP interface. See code samples below for authenticating and listing tools with MaggClient or FastMCP Client, and for adding a server via Claude Desktop integration.

Available Tools (16)

Examples & Tutorials

Running Magg and getting started:

<h1 class="text-2xl font-semibold mt-5 mb-3">Install Magg as a tool</h1>
uv tool install magg

<h1 class="text-2xl font-semibold mt-5 mb-3">Run with stdio transport (Claude Desktop, Cline, etc.)</h1>
magg serve

<h1 class="text-2xl font-semibold mt-5 mb-3">Run with HTTP transport (system-wide access)</h1>
magg serve --http

Alternative: Run directly from GitHub

<h1 class="text-2xl font-semibold mt-5 mb-3">Run with stdio transport</h1>
uvx --from git+https://github.com/sitbon/magg.git magg

<h1 class="text-2xl font-semibold mt-5 mb-3">Run with HTTP transport</h1>
uvx --from git+https://github.com/sitbon/magg.git magg serve --http

Local development:

<h1 class="text-2xl font-semibold mt-5 mb-3">Clone the repository</h1>
git clone https://github.com/sitbon/magg.git
cd magg

<h1 class="text-2xl font-semibold mt-5 mb-3">Install in development mode with dev dependencies</h1>
uv sync --dev
<h1 class="text-2xl font-semibold mt-5 mb-3">or with poetry</h1>
poetry install --with dev

<h1 class="text-2xl font-semibold mt-5 mb-3">Run the CLI</h1>
magg --help

Claude Desktop / mbro integration examples:

<h1 class="text-2xl font-semibold mt-5 mb-3">Claude Code example to use Magg in hybrid mode</h1>
claude mcp add magg -- magg serve --hybrid --port 42000

MBro usage to inspect Magg:

mbro connect magg "magg serve --hybrid --port 8080"
mbro:local-magg> call magg_status
mbro:local-magg> call magg_list_servers

Magg client usage (authenticated via JWT):

from magg.client import MaggClient

async def main():
async with MaggClient("http://localhost:8000/mcp") as client:
tools = await client.list_tools()

JWT authentication with FastMCP:

from fastmcp import Client
from fastmcp.client import BearerAuth

jwt_token = "your-jwt-token-here"
async with Client("http://localhost:8000/mcp", auth=BearerAuth(jwt_token)) as client:
tools = await client.list_tools()


Installation Guide

Step-by-step installation and setup from the documentation:

1) Quick Install (Recommended):

<h1 class="text-2xl font-semibold mt-5 mb-3">Install Magg as a tool</h1>
uv tool install magg

<h1 class="text-2xl font-semibold mt-5 mb-3">Run with stdio transport</h1>
magg serve

<h1 class="text-2xl font-semibold mt-5 mb-3">Run with HTTP transport</h1>
magg serve --http

2) Alternative: Run Directly from GitHub

<h1 class="text-2xl font-semibold mt-5 mb-3">Run with stdio transport</h1>
uvx --from git+https://github.com/sitbon/magg.git magg

<h1 class="text-2xl font-semibold mt-5 mb-3">Run with HTTP transport</h1>
uvx --from git+https://github.com/sitbon/magg.git magg serve --http

3) Local Development:

<h1 class="text-2xl font-semibold mt-5 mb-3">Clone the repository</h1>
git clone https://github.com/sitbon/magg.git
cd magg

<h1 class="text-2xl font-semibold mt-5 mb-3">Install in development mode with dev dependencies</h1>
uv sync --dev

<h1 class="text-2xl font-semibold mt-5 mb-3">Or with poetry</h1>
poetry install --with dev

<h1 class="text-2xl font-semibold mt-5 mb-3">Run the CLI</h1>
magg --help

Integration Guides

Frequently Asked Questions

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Important Notes

Notes and important details from the docs:

  • Magg exposes a built-in MBro (MCP Browser) for interactive exploration.

  • It supports multiple transport modes: stdio, HTTP, and hybrid.

  • Authentication is optional via RSA-based JWT; MAGG can be configured with an auth mechanism.

  • Configuration is stored in .magg/config.json and can be dynamically reloaded.

  • Kits allow grouping of servers; you can load/unload kits and query kit info.

  • Magg provides health and status tools (magg_status, magg_check) to monitor and repair MCP servers.

  • Docker images are provided for production, staging, and development, with multi-stage builds (pro/pre/dev).
  • Prerequisites

    Prerequisites: Python 3.12 or higher (3.13+ recommended); Python package uv is recommended and can be installed from astral.sh/uv. Magg is run as a tool via uv (uv tool install magg).

    Details
    Last Updated1/1/2026
    Websitepypi.org
    SourceGitHub

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