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Meta MCP Proxy

@nullplatform

Repository

Basic information

Category

Other

Transports

stdio

Author

nullplatform

Submitted by

Gabriel Eisbruch

About Meta MCP Proxy

A flexible Model Context Protocol (MCP) proxy that enables discovery and execution of tools across multiple MCP servers and JavaScript functions. Enabling to have a reduced context event if you have houndreds of tools. This mcp act as wrapper of other mcps (or libraries) doing a

#rag#local-index#tools#proxy

Meta MCP Proxy config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "mcp-openapi-proxy": {
      "command": "npx",
      "args": [
        "@nullplatform/meta-mcp-proxy",
        "-f",
        "config.json"
      ]
    }
  }
}

Meta MCP Proxy tools

Tool list not available yet

This listing does not currently have a tool list to display. This does not mean the server has no tools; check its documentation for supported capabilities.

Fetch the live tool list by running this server in a temporary sandbox using the button above.

Overview

What is Meta Mcp Proxy?

Meta Mcp Proxy is a flexible Model Context Protocol (MCP) proxy that enables discovery and execution of tools across multiple MCP servers and JavaScript functions. It acts as a wrapper around other MCPs or libraries, doing a kind of local Retrieval Augmented Generation (RAG) to reduce context size by providing the LLM with two methods: discover and execute.

How to use Meta Mcp Proxy?

Install by adding a configuration entry to your Claude desktop config file (~/Library/Application Support/Claude/claude_desktop_config.json) with the command npx and args ["@nullplatform/meta-mcp-proxy","-f","config.json"], then create a config.json file specifying discoverDescriptionExtras, discoverLimit, and an mcpServers object containing server definitions with command, args, env, and transport.

Key features of Meta Mcp Proxy

  • Unified tool discovery across multiple MCP servers.
  • Proxy execution of tool calls to the appropriate server.
  • Smart search with fuzzy matching for finding the best tool.
  • Expose custom JavaScript functions as MCP tools.
  • Configurable via files or command-line arguments.

Use cases of Meta Mcp Proxy

  • Aggregating dozens of MCP servers into a single interface to avoid context overload.
  • Enabling an LLM to discover relevant tools from a large toolset without sending all tool definitions.
  • Wrapping custom JavaScript libraries as MCP tools for AI consumption.

Frequently asked questions

1

How does Meta Mcp Proxy reduce context size?

It provides the LLM with only two methods (`discover` and `execute`) and asks the LLM to be concise about discovery, using a local RAG approach to retrieve relevant tools on demand.

2

What is the configuration file format?

The `config.json` should include `discoverDescriptionExtras` (recommended), `discoverLimit`, and an `mcpServers` object where each server defines `command`, `args`, `env`, and `transport` (defaults to `stdio`).

3

What runtime dependencies does Meta Mcp Proxy require?

It is installed via `npx`, so Node.js and npm are required. The proxy itself runs JavaScript and can execute other MCP servers defined in configuration.

4

Does Meta Mcp Proxy support authentication or custom transports?

Yes, each MCP server in the configuration can include environment variables (`env`) and specify a `transport` type (currently shown as `"stdio"` in examples).

5

How do I help the LLM choose the right tool?

Set `discoverDescriptionExtras` in configuration to provide detailed context about the purpose of the tools and for what topics the LLM should use them.

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