MCP OpenAI Server

MCP OpenAI Server

Seamlessly connect OpenAI's models to Claude via Model Context Protocol.

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MCP OpenAI Server acts as a Model Context Protocol (MCP) bridge allowing Claude Desktop to access and interact with multiple OpenAI chat models. It enables users to leverage models such as GPT-4o and O1 directly from Claude using a straightforward message-passing interface. The server supports easy integration through configuration and provides basic error handling. Designed for use with Node.js and requiring an OpenAI API key, it is tailored for macOS with support for other platforms in progress.

Key Features

Model Context Protocol server implementation
Direct integration with OpenAI chat models
Supports multiple OpenAI models (gpt-4o, gpt-4o-mini, o1-preview, o1-mini)
Simple message passing interface
Custom model selection
Environment variable support for API keys
Basic error handling
macOS compatibility (verified)
Easy setup via Claude Desktop config
Command-line deployment using npx

Use Cases

Using OpenAI chat models from within Claude Desktop
Switching between different OpenAI models during a conversation
Leverage OpenAI's capabilities alongside Claude's features
Rapid prototyping and testing of OpenAI models in a desktop environment
Context-aware chat completion by integrating with Claude
Automated message sending to OpenAI with simple configuration
Model selection for specific conversation needs directly from Claude
Debugging and monitoring via desktop app logs
Seamless API key management via environment variables
Multi-model experimentation for chatbot responses in a desktop workflow

README

MCP OpenAI Server

A Model Context Protocol (MCP) server that lets you seamlessly use OpenAI's models right from Claude.

Features

  • Direct integration with OpenAI's chat models
  • Support for multiple models including:
    • gpt-4o
    • gpt-4o-mini
    • o1-preview
    • o1-mini
  • Simple message passing interface
  • Basic error handling

Prerequisites

Installation

First, make sure you've got the Claude Desktop app installed and you've requested an OpenAI API key.

Add this entry to your claude_desktop_config.json (on Mac, you'll find it at ~/Library/Application\ Support/Claude/claude_desktop_config.json):

json
{
  "mcpServers": {
    "mcp-openai": {
      "command": "npx",
      "args": ["-y", "@mzxrai/mcp-openai@latest"],
      "env": {
        "OPENAI_API_KEY": "your-api-key-here (get one from https://platform.openai.com/api-keys)"
      }
    }
  }
}

This config lets Claude Desktop fire up the OpenAI MCP server whenever you need it.

Usage

Just start chatting with Claude and when you want to use OpenAI's models, ask Claude to use them.

For example, you can say,

plaintext
Can you ask o1 what it thinks about this problem?

or,

plaintext
What does gpt-4o think about this?

The server currently supports these models:

  • gpt-4o (default)
  • gpt-4o-mini
  • o1-preview
  • o1-mini

Tools

  1. openai_chat
    • Sends messages to OpenAI's chat completion API
    • Arguments:
      • messages: Array of messages (required)
      • model: Which model to use (optional, defaults to gpt-4o)

Problems

This is alpha software, so may have bugs. If you have an issue, check Claude Desktop's MCP logs:

bash
tail -n 20 -f ~/Library/Logs/Claude/mcp*.log

Development

bash
# Install dependencies
pnpm install

# Build the project
pnpm build

# Watch for changes
pnpm watch

# Run in development mode
pnpm dev

Requirements

  • Node.js >= 18
  • OpenAI API key

Verified Platforms

  • macOS
  • Linux

License

MIT

Author

mzxrai

Star History

Star History Chart

Repository Owner

mzxrai
mzxrai

User

Repository Details

Language JavaScript
Default Branch main
Size 55 KB
Contributors 1
License MIT License
MCP Verified Nov 12, 2025

Programming Languages

JavaScript
100%

Tags

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