MetaMCP

MetaMCP is an MCP proxy that allows you to dynamically aggregate MCP servers into a unified MCP server and apply middleware. MetaMCP itself is also an MCP server, so it can easily connect to any MCP client.

Key Features

🏷️ Group MCP servers into namespaces, host them as meta-MCP, and assign public endpoints (SSE or Streamable HTTP) with authentication. Switch endpoint namespaces with one click.
🎯 Choose only the tools you need when mixing MCP servers. Apply other pluggable middleware such as observability, security, etc.
🔍 Enhanced MCP inspector that supports saving server configurations and checking if MetaMCP endpoints are available locally.
🔍 Elasticsearch for MCP tool selection.

Core Concepts

MCP Server

MCP server configuration that tells MetaMCP how to start an MCP server.

MetaMCP Namespace

Group one or more MCP servers into a namespace
Support enabling/disabling MCP servers at server or tool level
Apply middleware to process MCP requests and responses at the namespace level

MetaMCP Endpoint

Create endpoints and assign namespaces to them
Multiple MCP servers within a namespace will be aggregated and output as a MetaMCP endpoint
Optional API Key authentication or MCP Spec 2025-06-18 standard OAuth
Exposed via SSE or Streamable HTTP transport protocols and OpenAPI endpoints

Middleware

Intercept and transform MCP requests and responses at the namespace level
Built-in example: "Filter inactive tools" - optimize tool context for LLMs

Use Cases

As infrastructure, hosting dynamically composed MCP servers through a unified endpoint
Choose only the tools you need when mixing MCP servers
Enhanced MCP inspector with support for saving server configurations
Search engine for MCP tool selection

More Information

For more details, visit the official documentation: https://docs.metamcp.com

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