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MCP server · Developer Tools

Mcpview

by · github.com/kungfusheep/mcpview

Terminal UI for testing MCP servers (fast debugging and visualisation tool)

Unclaimed Apache-2.0 last commit a year ago mcp-toolsmcpdevtools
InstallView source
49Fair

Scored yesterday · breakdown

About Mcpview

Mcpview is an MCP server published by kungfusheep in the Developer Tools category: terminal UI for testing MCP servers (fast debugging and visualisation tool). It has been installed 0 times through Conduid.

The repository has 5 stars and 1 forks, with the last commit a year ago. Six months or more without a commit doesn't mean the server is broken, but check the open issues (0) before depending on it in production.

Install

Install
npx mcpview

This server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.

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Security checks

  • ·README presentNot checked yet.
  • ·License declaredNot checked yet.
  • ·Tests presentNot checked yet.
  • ·Dependencies pinnedNot checked yet.
  • ·No dynamic code executionNot checked yet.
  • !Scoped permissionsDoesn't declare a permission scope. Assume it can do anything its process can.

Releases

0.2.00.2.0 · 5 Jul 2025What's Changed fix: omitempty "id" fields on notification messages by @themastersheep in https://github.com/kungfusheep/mcpview/pull/3 New Contributors @themastersheep made their first contribution in…
0.1.00.1.0 · 25 Jun 2025

README

MCP Explorer

A terminal UI for developing, debugging, and testing MCP (Model Context Protocol) servers.

Session-based proxy debugging • Live message monitoring • Tool testing with dynamic forms • Message persistence Convert to GIF June 25 2025 (2)

Features

  • 🔄 Session Management - Persistent proxy sessions for debugging any MCP setup
  • 🔗 Attach Mode - Connect to running proxy sessions for live debugging
  • 🛠️ Tool Testing - Dynamic parameter forms generated from JSON schemas
  • 🔍 Debug Mode - Live message monitoring with split-pane interface
  • 💾 Message Persistence - Session history preserved across connections
  • 📊 Response History - Navigate through execution history with syntax highlighting
  • ⚡ Real-time - Watch MCP traffic flow in real-time with timestamps

Installation

go install github.com/kungfusheep/mcpview@latest

Or build from source:

git clone https://github.com/kungfusheep/mcpview
cd mcpview
go build -o mcpview .

Usage

Quick Start (Direct Connection)

# Interactive mode with connection prompt
mcpview

# Connect directly to an MCP server for testing
mcpview --server "python my_server.py"

# Debug mode with live message monitoring
mcpview --debug --server "npx @modelcontextprotocol/server-filesystem /"

Proxy Debugging Workflow

The most powerful way to debug MCP communication is using proxy sessions:

# 1. Start a proxy session (creates a session like "aal-swift-0625-1234")
mcpview --proxy --target "python server.py"

# 2. In another terminal, attach to debug the session
mcpview --attach                    # Shows interactive session browser
mcpview --list-sessions            # Lists all active sessions

# 3. Configure your MCP client to connect through the proxy
# Replace "python server.py" with "mcpview --proxy --target 'python server.py'"

Convert to GIF Project June 25 2025

Custom Session Management:

# Named sessions for easier identification
mcpview --proxy --target "node server.js" --session "myapi"

# Custom session storage directory
mcpview --attach --sessions-dir ./debug-sessions

Key Controls

Session List: ↑↓/jk navigate • Enter attach to session • q quit

Session Viewer: ↑↓/jk scroll messages • [/] scroll detail • Esc back to list

Tool Testing: t test tool • r resources • m messages • d debug mode • q quit

Practical Examples

Debugging Claude Desktop Integration

# 1. Start proxy for your MCP server
mcpview --proxy --target "python ~/my-mcp-server/main.py"

# 2. Update Claude Desktop config to use the proxy:
# Change: "command": "python ~/my-mcp-server/main.py"
# To: "command": "mcpview --proxy --target 'python ~/my-mcp-server/main.py'

# 3. Attach to see all Claude ↔ Server communication
mcpview --attach

Testing During Development

# Direct connection for quick tool testing
mcpview --server "python my_server.py"

# Debug mode to see protocol messages while testing
mcpview --debug --server "npx @modelcontextprotocol/server-filesystem /Users/me/docs"

Multi-Server Debugging

# Start multiple proxy sessions
mcpview --proxy --target "python db_server.py"
mcpview --proxy --target "node fs_server.js"

# Attach to debug any session
mcpview --attach    # Choose which session to inspect

What is MCP?

Model Context Protocol enables applications to provide context to LLMs in a standardized way. MCP Explorer helps you develop and debug MCP servers by providing visibility into the protocol communication.

License

Apache License 2.0 - see LICENSE for details.

README mirrored from the source repository yesterday. The original is authoritative.

Questions

About Mcpview

How do I install Mcpview?

Run npx mcpview, then add the server to your MCP client's configuration. Conduid has recorded 0 installs, so the command is known to work with current clients.

Is Mcpview safe to use with an AI agent?

Its trust score is 49 out of 100 (fair). It passes 0 of 1 static security checks; the failures are listed above. It has no ConduID identity yet, so agent calls to it are not receipted.

Is Mcpview still maintained?

The last commit was a year ago, with 0 open issues. That's long enough that you should check whether the maintainer is responding to issues before depending on it.