What is multi-mcp CLAUDE.md?

A set of instructions for Claude Code, an AI coding assistant, when working on the Multi-MCP Python project. The project connects one server to multiple Model Context Protocol (MCP) servers and routes requests between them.

Use it when modifying or reviewing Multi-MCP, especially its server routing, backend connections, standard input/output or server-sent events, logging, and tool namespacing.

It gives the coding assistant the project’s architecture, components, transport methods, and naming patterns so its changes fit the existing codebase.

multi-mcp CLAUDE.md — Instructions file for coding agents by itstanner5216: A set of instructions for Claude Code, an AI…

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add instructions/itstanner5216/multi-mcp/claude-md

Clone the repo

git clone --depth 1 https://github.com/itstanner5216/multi-mcp

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/itstanner5216/multi-mcp/claude-md.svg)](https://agentmods.dev/instructions/itstanner5216/multi-mcp/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/itstanner5216/multi-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/itstanner5216/multi-mcp/claude-md.svg" alt="Measured on agentmods" height="20"></a>

Per session 3,073 This file is loaded in full into every session.

When invoked 3,073 The same file — it is already loaded in full.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5	$0.03073	$0.03073
Opus 5	$0.01537	$0.01537
Sonnet 5	$0.00615	$0.00615
Haiku 4.5	$0.00307	$0.00307

Measured 3d ago against content hash 17d48792f1a6, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

multi-mcp CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 304 lines

How it starts

The opening of the file, as written. The whole thing — 304 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

Multi-MCP is a Python-based proxy server that acts as a single MCP (Model Context Protocol) server while connecting to and routing between multiple backend MCP servers. It supports both STDIO and SSE (Server-Sent Events) transports and can dynamically add/remove MCP servers at runtime.

Architecture

Core Components

MultiMCP (src/multimcp/multi_mcp.py): Main server orchestrator that handles configuration, transport modes, and HTTP endpoints
MCPProxyServer (src/multimcp/mcp_proxy.py): Core proxy that forwards MCP requests to backend servers, handles tool namespacing (server_name_tool_name), and manages capabilities aggregation
MCPClientManager (src/multimcp/mcp_client.py): Manages lifecycle of multiple MCP client connections (both stdio and SSE)
Logger (src/utils/logger.py): Centralized logging using loguru with multi_mcp.* namespace

Key Patterns

Tool Namespacing: Tools are namespaced as server_name__tool_name (double underscore separator) to avoid conflicts when multiple servers expose tools with the same name
Transport Flexibility: Supports both STDIO (for CLI/pipe-based) and SSE (for HTTP/network-based) communication
Dynamic Server Management: Can add/remove MCP servers at runtime via HTTP API (SSE mode only)
Capability Aggregation: Proxies and combines tools, prompts, and resources from all connected backend servers

Development Commands

Running the Server

# STDIO mode (default)
uv run main.py --transport stdio

# SSE mode with custom host/port
uv run main.py --transport sse --host 0.0.0.0 --port 8080

# With custom config file
uv run main.py --config ./examples/config/mcp_k8s.json

# Quick development run
make run

Testing

# Individual test suites
make test-proxy      # Core proxy functionality  
make test-e2e        # End-to-end integration tests
make test-lifecycle  # Client lifecycle management
make test-k8s        # Kubernetes deployment tests (requires docker-build)

# All tests
make all-test

# Run specific test file directly
pytest -s tests/proxy_test.py

Read the full file on GitHub · 304 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

3d ago First seen · 304 lines · 3,073 tokens per session scan A 17d48792f1a6

Subscribe to this mod's changes

multi-mcp CLAUDE.md is an instructions file published in the GitHub repository itstanner5216/multi-mcp (1 stars, last pushed 1mo ago), licensed MIT. It adds 3,073 tokens to every session, about $0.0154 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 6,785 tokens

multi-mcp CLAUDE.md