MCP Server Test H98

🚀 MCP Server Testing

This project focuses on testing the MCP server. It attempts to use pyenv to build the environment instead of following the official uv method.

🚀 Quick Start

According to the official guide, the environment was initially supposed to be built using uv, but we decided to switch to pyenv.

Reference link: MCP Quick Start Guide

📦 Installation

Environment Setup Steps

1. Install Python 3.10 or higher
   As required, first install Python 3.11.5.
2. Set as the global version
   Use pyenv to set Python 3.11.5 as the default version.

MCP Configuration

Based on the official example, the MCP configuration file is as follows:

{
    "mcpServers": {
        "weather": {
            "command": "python",
            "args": [
                "MY-PATH/mcp-server-test/src/main.py"
            ]
        }
    }
}

💻 Usage Examples

Problem Encountered

When running the server, the following error occurred:

2025-04-15T14:13:02.862Z [weather] [info] Initializing server...

2025-04-15T14:13:02.891Z [weather] [error] spawn python ENOENT {"context":"connection","stack":"Error: spawn python ENOENT\n  at ChildProcess._handle.onexit (node:internal/child_process:285:19)\n  at onErrorNT (node:internal/child_process:483:16)\n  at process.processTicksAndRejections (node:internal/process/task_queues:82:21)"}

2025-04-15T14:13:02.891Z [weather] [error] spawn python ENOENT {"stack":"Error: spawn python ENOENT\n  at ChildProcess._handle.onexit (node:internal/child_process:285:19)\n  at onErrorNT (node:internal/child_process:483:16)\n  at process.processTicksAndRejections (node:internal/process/task_queues:82:21)"}

2025-04-15T14:13:02.896Z [weather] [info] Server transport closed

2025-04-15T14:13:02.896Z [weather] [info] Client transport closed

2025-04-15T14:13:02.896Z [weather] [info] Server transport closed unexpectedly, this is likely due to the process exiting early. If you are developing this MCP server you can add output to stderr (i.e. `console.error('...')` in JavaScript, `print('...', file=sys.stderr)` in python) and it will appear in this log.

2025-04-15T14:13:02.896Z [weather] [error] Server disconnected. For troubleshooting guidance, please visit our [debugging documentation](https://modelcontextprotocol.io/docs/tools/debugging) {"context":"connection"}

The error message indicates that the python command was not found.

Solution

Check the Python installation path:

$ which python
MY-PATH/.pyenv/shims/python

Modify the MCP configuration file to specify the full Python path:

{
    "mcpServers": {
        "weather": {
            "command": "MY-PATH/.pyenv/shims/python",
            "args": [
                "MY-PATH/mcp-server-test/src/main.py"
            ]
        }
    }
}

📚 Documentation

Summary

By specifying the full path of the Python executable file, the issue of the python command not being found was resolved.