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MCP OpenAI Server

MCP OpenAI Server

Local
github.com/mzxraiAI & Agents77Updated 99w ago
Repository

About MCP OpenAI Server

MCP OpenAI Server is an MCP server that lets Claude Desktop send chat requests to OpenAI models. It suits users who want a second model's answer inside a Claude conversation.

Key features

  1. 01Chat with OpenAI chat models
  2. 02Supports gpt-4o, gpt-4o-mini and o1 models
  3. 03Optional model selection with gpt-4o default
  4. 04Basic error handling

Use cases

  1. 01Ask o1 to analyze a problem inside Claude Desktop
  2. 02Get a second opinion from gpt-4o on the same content

MCP support

The project runs as an MCP server and exposes an openai_chat tool that MCP clients such as Claude Desktop can call to forward messages to OpenAI.

Configuration

Local server config is the same for every client. Copy it into your client’s MCP config file.

mcp.json · Universal config
{
  "mcpServers": {
    "openai": {
      "command": "npx",
      "args": [
        "-y",
        "@mzxrai/mcp-openai"
      ],
      "env": {
        "OPENAI_API_KEY": "<OPENAI_API_KEY>"
      }
    }
  }
}
Run commandnpx -y @mzxrai/mcp-openai
Environment variables to set
OPENAI_API_KEYSecret

Local servers need a runtime on your machine (e.g. Node.js 18+). Config file locations differ by client; see your client’s docs.

Packages
npm@mzxrai/mcp-openai

Tools

1

Saved tool list · updated 3w ago

ParameterTypeRequiredDescription
messagesarrayYesArray of messages to send to the API
modelenumNoModel to use for completion (gpt-4o, gpt-4o-mini, o1-preview, o1-mini)gpt-4o | gpt-4o-mini | o1-preview | o1-mini

Details

From the project 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):

{
  "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,

Can you ask o1 what it thinks about this problem?

or,

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:

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

Development

# 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

Comments

Markdown supported

New to MCP?

From what the protocol is to installing your first server, these answers cover most first questions.

An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.