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mcp-reticle

by soth-ai·★ 110·Score 48

Reticle is a debugging tool for MCP servers that intercepts, visualizes, and profiles JSON-RPC traffic in real-time with zero latency overhead.

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Overview

Reticle acts as a proxy for MCP servers, allowing developers to inspect raw JSON-RPC messages, correlate requests with responses, profile latency, and capture server errors. It supports multiple transport protocols including stdio, Streamable HTTP, WebSocket, and HTTP/SSE. The tool provides both a UI interface and a log-only mode, making it versatile for different debugging needs.

Try asking AI

After installing, here are 5 things you can ask your AI assistant:

you:Debugging MCP server integrations by inspecting JSON-RPC traffic
you:Profiling performance issues and token usage in MCP communication
you:Capturing and recording MCP sessions for later analysis
you:What transport protocols does Reticle support?
you:Does Reticle add latency to MCP communication?

When to choose this

Choose Reticle when you need to debug MCP communication issues, profile tool performance, or visualize request-response flows between your LLM and MCP servers.

When NOT to choose this

Avoid Reticle if you need production-level monitoring with alerts, or if you require advanced analytics beyond basic traffic inspection and profiling.

Tools this server exposes

4 tools extracted from the README
  • run

    Wrap stdio MCP servers and inspect traffic

  • proxy

    Reverse proxy HTTP/SSE/WebSocket transports

  • ui

    Launch the desktop UI

  • daemon

    Headless telemetry hub

Note: Inferred tool names from CLI commands in the documentation. These appear to be commands of the mcp-reticle tool itself rather than MCP tools exposed by a server.

Comparable tools

mcp-debug-proxywiresharkcharles-proxy

Installation

Install Reticle using one of these methods:

# npm
npm install -g mcp-reticle

# pip
pip install mcp-reticle

# Homebrew
brew install labterminal/mcp-reticle/mcp-reticle

Wrap your MCP server with Reticle:

{
  "mcpServers": {
    "filesystem": {
      "command": "mcp-reticle",
      "args": ["run", "--name", "filesystem", "--", "npx", "-y", "@modelcontextprotocol/server-filesystem", "/Users/me/work"]
    }
  }
}

Launch the UI:

mcp-reticle ui

FAQ

What transport protocols does Reticle support?
Reticle supports stdio, Streamable HTTP, WebSocket, and HTTP/SSE transport protocols for MCP servers.
Does Reticle add latency to MCP communication?
Reticle is designed with microsecond-level overhead, essentially providing zero latency impact on MCP communication.

Compare mcp-reticle with

mcp-reticle vs ultimate_mcp_servermcp-reticle vs mcp-server-chartmcp-reticle vs everythingmcp-reticle vs filesystemmcp-reticle vs time
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Last updated · Auto-generated from public README + GitHub signals.