MCP-123, a 2-line MCP server/client (Windows-friendly)

In plain words

MCP-123 is a lightweight Model Context Protocol server and client implementation designed for Windows compatibility. It simplifies MCP setup by eliminating verbose configuration and platform-specific dependencies like Docker or Mac-only scripts. Users point the tool at a tools.py file, run a single server command, and the client automatically discovers and executes functions through OpenAI's API. It targets developers seeking a straightforward way to integrate MCP without complexity.

written from the facts on this page · September 2026

From the sources

The easiest possible implementation of an MCP server and client. Set up a server or a client in 2 lines of code. - Tylersuard/MCP-123

Easy tool creation : Write normal functions in your tools.py file— no decorators or special wrappers needed —and they get included as tools that your MCP server can use automatically. OpenAI integration : The client uses your OpenAI API key to answer questions, calling tools as needed. pip install -r requirements.txt 2. Create Your Tools Define your functions in tools.py . No decorators needed, they are automatically added to your MCP server as tools. For example: def add ( a : int , b : int ) -> int : """Add two numbers.""" return a + b 3. Start the MCP Server (2 lines) from mcp123 import server server . run_server ( "tools.py" , port = 9999 ) 4. Set up the MCP Client (2 lines) from mcp123…from github.com

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