Magg
local MCP serverMagg is a local MCP server: Aggregates and proxies other MCP servers, letting LLMs discover, add, and manage tools at runtime. Install it from pypi as magg.
Installation
Terminal
claude mcp add magg -- uvx magg
Run in your project folder. Add --scope user to use it everywhere.
Claude Desktop, Cursor & other clients
Add to claude_desktop_config.json or .cursor/mcp.json.
{
"mcpServers": {
"magg": {
"command": "uvx",
"args": [
"magg"
]
}
}
}What you need
- Runtime: Python with uv (runs with uvx).
- MCP client: Claude Code, Codex, Antigravity, Claude Desktop, Cursor or any other client that speaks MCP over stdio.
Summary
Aggregates and proxies other MCP servers, letting LLMs discover, add, and manage tools at runtime.
Magg vs similar servers
| Server | Stars | Type | API key | Runtime |
|---|---|---|---|---|
| Magg | 144 | Local | No | pypi |
| mcp-server | 44K | Hosted | No | None |
| kaneo | 9,252 | Local | Yes | npm |
| MCP Registry Server | 7,291 | Hosted | No | None |
| openflowkit-mcp | 816 | Local | No | npm |
Questions
No. The registry entry lists no keys or environment variables.
Python with uv (runs with uvx), plus an MCP client such as Claude Code, Codex, Claude Desktop or Cursor.
Magg is a local MCP server distributed as the pypi package magg.
Run: claude mcp add magg -- uvx magg
Run: codex mcp add magg -- uvx magg
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