🔧 MCP Fixer Server

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

FAQ from MCP Fixer Server

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.