Magg

Name: Magg
Author: sitbon

@executeautomation/calculator-mcp · by sitbon

Magg: The MCP Aggregator

135 7 tools GitHub npm

No known CVEs

AGPL-3.0 license

Actively maintained

Last commit 4d ago

Works with most clients

Transport: stdio, sse, http

7 tools · ~302 tok

Grade A · 0.2% of 200K ctx

Edit this pageView history

Developer Tools

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": {
    "magg": {
      "args": [
        "-y",
        "@executeautomation/calculator-mcp"
      ],
      "command": "npx"
    }
  }
}

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[![MCPpedia Score](https://mcppedia.org/api/badge/magg)](https://mcppedia.org/s/magg)

Read me

What Magg does

Test This Server

This server supports HTTP transport. Be the first to test it — help the community know if it works.

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Scored, not listed

Why this score

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

Score breakdown

90/100across 5 weighted dimensions

How we score →

0255075100

−10

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked @executeautomation/calculator-mcp against OSV.dev.

Inventory

Tools (7)

Click any tool to inspect its schema.

~302 tokens total

Community

Reviews

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

Frequently Asked Questions

Is Magg safe to use?: Magg 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 AGPL-3.0.
How do I install Magg?: Magg 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 Magg do?: Magg provides 7 tools: search_servers, add_server, enable_server, disable_server, magg_status and 2 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with Magg?: Magg is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.
Is Magg actively maintained?: Magg is actively maintained — last commit was 4 days ago. It has 135 GitHub stars.

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MCP Security Weekly

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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?

What is Magg?

Magg is a meta-MCP server that acts as a central hub for managing multiple MCP servers. It provides tools that allow LLMs to:

Search for new MCP servers and discover setup instructions

Add and configure MCP servers dynamically

Enable/disable servers on demand

Aggregate tools from multiple servers under unified prefixes

Persist configurations across sessions

Think of Magg as a "package manager for LLM tools" - it lets AI assistants install and manage their own capabilities at runtime.

Features

Self-Service Tool Management: LLMs can search for and add new MCP servers without human intervention.

Dynamic Configuration Reloading: Automatically detects and applies config changes without restarting.

Automatic Tool Proxying: Tools from added servers are automatically exposed with configurable prefixes.

ProxyMCP Tool: A built-in tool that proxies the MCP protocol to itself, for clients that don't support notifications or dynamic tool updates (which is most of them currently).

Smart Configuration: Uses MCP sampling to intelligently configure servers from just a URL.

Persistent Configuration: Maintains server configurations in .magg/config.json.

Multiple Transport Support: Works with stdio, HTTP, and in-memory transports.

**Be

Frequently Asked Questions

Is Magg safe to use?

Magg 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 AGPL-3.0.

How do I install Magg?

Magg 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 Magg do?

Magg provides 7 tools: search_servers, add_server, enable_server, disable_server, magg_status and 2 more. See the full tools list on the server page for descriptions and parameters.

What AI clients work with Magg?

Magg is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.

Is Magg actively maintained?

Magg is actively maintained — last commit was 4 days ago. It has 135 GitHub stars.

🧲 Magg - The MCP Aggregator

A Model Context Protocol server that manages, aggregates, and proxies other MCP servers, enabling LLMs to dynamically extend their own capabilities.

What is Magg?

Magg is a meta-MCP server that acts as a central hub for managing multiple MCP servers. It provides tools that allow LLMs to:

Search for new MCP servers and discover setup instructions
Add and configure MCP servers dynamically
Enable/disable servers on demand
Aggregate tools from multiple servers under unified prefixes
Persist configurations across sessions

Think of Magg as a "package manager for LLM tools" - it lets AI assistants install and manage their own capabilities at runtime.

Features

Self-Service Tool Management: LLMs can search for and add new MCP servers without human intervention.
Dynamic Configuration Reloading: Automatically detects and applies config changes without restarting.
Automatic Tool Proxying: Tools from added servers are automatically exposed with configurable prefixes.
ProxyMCP Tool: A built-in tool that proxies the MCP protocol to itself, for clients that don't support notifications or dynamic tool updates (which is most of them currently).
Smart Configuration: Uses MCP sampling to intelligently configure servers from just a URL.
Persistent Configuration: Maintains server configurations in .magg/config.json.
Multiple Transport Support: Works with stdio, HTTP, and in-memory transports.
**Be

... View full README on GitHub