MCP Fixer Server

@Kajdep

Basic information

About MCP Fixer Server

Build-and-run diagnostics for Claude Desktop MCP servers in one command. MCP-Fixer runs 25 diagnostics on every MCP server, pinpoints port/path issues, and offers one-click fixes – no config.

MCP Fixer Server config

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

{
  "mcpServers": {
    "mcp-fixer": {
      "command": "npx",
      "args": [
        "@kajdep/mcp-fixer",
        "serve"
      ],
      "type": "stdio"
    }
  }
}

MCP Fixer Server 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 MCP Fixer Server?

A comprehensive diagnostic and repair tool for Model Context Protocol (MCP) servers in Claude Desktop. It automatically detects, diagnoses, and fixes common MCP configuration issues.

How to use MCP Fixer Server?

Install via npx (npx @your-username/mcp-fixer-server install), global npm (npm install -g @your-username/mcp-fixer-server then mcp-fixer install), or clone and install locally. Once installed, ask Claude to run diagnostic tools (e.g., “Claude, diagnose my MCP configuration”) or use the CLI with commands like mcp-fixer check, mcp-fixer config, or mcp-fixer run.

Key features of MCP Fixer Server

Configuration Analysis – Validates JSON syntax, paths, and server settings
Server Status Monitoring – Real-time health checks for individual MCP servers
Dependency Validation – Ensures Node.js, npm, Python, UV are properly installed
Port Conflict Detection – Identifies network conflicts on common MCP ports
Automatic Syntax Fixing – Repairs JSON errors with automatic backup creation
Log File Analysis – Parses MCP logs for error patterns and insights
Smart Suggestions – Provides targeted fix recommendations
Safety First – Creates backups before any modifications

Use cases of MCP Fixer Server

Diagnose and fix JSON syntax errors in MCP configuration files
Check connectivity and health of individual MCP servers
Validate that required dependencies (Node.js, npm, Python) are present
Detect port conflicts that prevent MCP servers from starting
Generate a comprehensive diagnostic report for troubleshooting

Frequently asked questions

What does MCP Fixer Server do?

It is a diagnostic and repair tool that automatically detects, diagnoses, and fixes common MCP configuration issues in Claude Desktop.

How do I install MCP Fixer Server?

You can install it via npx (`npx @your-username/mcp-fixer-server install`), globally with npm (`npm install -g @your-username/mcp-fixer-server`), or by cloning the repository and running `npm install` and `npm run install:claude`.

What are the prerequisites?

You need Node.js 18+ installed, Claude Desktop with MCP support, and npm or npx available.

Does MCP Fixer Server create backups before making changes?

Yes, the tool includes a “Safety First” feature that creates backups before any modifications to configuration files.

What tools are available in MCP Fixer Server?

The available tools include `diagnose_mcp_config`, `check_mcp_server_status`, `fix_config_syntax`, `validate_dependencies`, `check_port_conflicts`, `generate_diagnostic_report`, and `suggest_fixes`.

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