MCP-echo-server

MCP-echo-server

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developer_toolssecuritymonitoring

This project serves as a template for creating MCP servers, offering a simple, easily customizable prototype for developers. It emphasizes setup instructions, troubleshooting, and best practices to ensure successful deployment and operation.

Overview

This project provides a template for developing an MCP (Model Context Protocol) server. It includes:

  • Specifications: A simple prototype server that echoes input for basic functionality verification.
  • Setup and Configuration: Instructions for project setup, TypeScript configuration, and server structure.
  • Deployment: Guides for server deployment on Cline and Claude environments.
  • Troubleshooting and Best Practices: Common issues and solutions, along with best practices for error handling, testing, and documentation.
  • Development Checklist: A checklist to ensure comprehensive development, testing, and documentation coverage.

FAQ

Common Issues

SDK-related Issues

  1. SDK Version Mismatch

    • Problem: No matching version found for @modelcontextprotocol/sdk@^x.x.x
    • Solution: Use the verified version ^1.5.0 and ensure compatibility with the caret symbol.

  2. Module Resolution Issues

    • Problem: Cannot find module '@modelcontextprotocol/sdk/server/index'
    • Solution: Add "type": "module" to package.json and include .js in import paths.
File System Permission Issues

  1. Execution Permission Errors

    • Problem: Permission denied
    • Solution: Add execution permissions in the build script using chmod.

  2. File Write Permissions

    • Problem: OSError: Read-only file system
    • Solution: Use directories with the appropriate permissions or run with sudo if needed.
Configuration File Issues

  1. Recognition Problems

    • Problem: MCP server not recognized
    • Solution: Use absolute paths and update both configuration files appropriately.

  2. Environment Variable Problems

    • Problem: Environment variables not recognized
    • Solution: Explicitly define in the "env" section of the server settings.
Process Management

  1. Duplicate Process Execution

    • Problem: Server starts multiple times
    • Solution: Terminate old processes in the startup script.

  2. Shutdown Problems

    • Problem: Process does not exit cleanly
    • Solution: Implement signal handlers like SIGINT for proper shutdown.