GPT-5 MCP Server

A Model Context Protocol (MCP) server that provides seamless integration with OpenAI's GPT-5 API. Access the most advanced language model directly through your favorite AI development tools.

Features

• Direct GPT-5 Integration: Access OpenAI's most advanced model through MCP
• Dual Tool Support:
  • gpt5_generate: Simple text generation with prompts
  • gpt5_messages: Structured conversation handling
• Flexible Parameters: Control temperature, max tokens, reasoning effort, and more
• Usage Tracking: Built-in token usage reporting
• TypeScript: Fully typed for better development experience

Installation

Prerequisites

• Node.js (v18 or higher)
• OpenAI API key with GPT-5 access

Quick Start

Option 1: Install from NPM (Recommended)

npm install -g @dannyboy2042/gpt5-mcp-server

Option 2: Build from Source

git clone https://github.com/danielbowne/gpt5-mcp.git
cd gpt5-mcp/servers/gpt5-server
npm install
npm run build

Set your OpenAI API key:

export OPENAI_API_KEY=your-api-key-here

Client Configuration

Claude Desktop

Add to your claude_desktop_config.json:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "gpt5-server": {
      "command": "npx",
      "args": ["@dannyboy2042/gpt5-mcp-server"],
      "env": {
        "OPENAI_API_KEY": "your-api-key-here"
      }
    }
  }
}

{
  "mcpServers": {
    "gpt5-server": {
      "command": "node",
      "args": ["/path/to/gpt5-mcp/servers/gpt5-server/build/index.js"],
      "env": {
        "OPENAI_API_KEY": "your-api-key-here"
      }
    }
  }
}

Cursor

Add to your Cursor settings:

{
  "mcpServers": {
    "gpt5-server": {
      "command": "npx",
      "args": ["@dannyboy2042/gpt5-mcp-server"],
      "env": {
        "OPENAI_API_KEY": "your-api-key-here"
      }
    }
  }
}

Windsurf

Add to your Windsurf configuration file:

macOS: ~/Library/Application Support/Windsurf/config.json Windows: %APPDATA%\Windsurf\config.json

{
  "mcpServers": {
    "gpt5-server": {
      "command": "npx",
      "args": ["@dannyboy2042/gpt5-mcp-server"],
      "env": {
        "OPENAI_API_KEY": "your-api-key-here"
      }
    }
  }
}

Continue

Add to your Continue configuration:

{
  "models": [
    {
      "model": "AUTODETECT",
      "provider": "mcp",
      "apiKey": "",
      "mcpServers": [
        {
          "command": "npx",
          "args": ["@dannyboy2042/gpt5-mcp-server"],
          "env": {
            "OPENAI_API_KEY": "your-api-key-here"
          }
        }
      ]
    }
  ]
}

Claude Code

Local Server Connection (Recommended)

claude mcp add gpt5-server -- npx -y @dannyboy2042/gpt5-mcp-server

With Environment Variable

claude mcp add gpt5-server -e OPENAI_API_KEY=your-api-key-here -- npx -y @dannyboy2042/gpt5-mcp-server

Legacy Method

claude mcp add gpt5-server -e OPENAI_API_KEY=your-api-key-here -- npx @dannyboy2042/gpt5-mcp-server

Generic MCP Client

For any MCP-compatible client, use:

{
  "command": "npx",
  "args": ["@dannyboy2042/gpt5-mcp-server"],
  "env": {
    "OPENAI_API_KEY": "your-api-key-here"
  }
}

Tools

gpt5_generate

Generate text using a simple input prompt.

Parameters:

• input (required): The text prompt for GPT-5
• model (optional): GPT-5 model variant (default: "gpt-5")
• instructions (optional): System instructions for the model
• reasoning_effort (optional): Reasoning level ("low", "medium", "high")
• max_tokens (optional): Maximum tokens to generate
• temperature (optional): Randomness level (0-2)
• top_p (optional): Top-p sampling parameter (0-1)

Example:

{
  "input": "Explain quantum computing in simple terms",
  "reasoning_effort": "high",
  "max_tokens": 500
}

gpt5_messages

Generate text using structured conversation messages.

Parameters:

• messages (required): Array of conversation messages
  • role: "user", "developer", or "assistant"
  • content: Message text
• model (optional): GPT-5 model variant (default: "gpt-5")
• instructions (optional): System instructions
• reasoning_effort (optional): Reasoning level
• max_tokens (optional): Maximum tokens
• temperature (optional): Randomness (0-2)
• top_p (optional): Top-p sampling (0-1)

Example:

{
  "messages": [
    {"role": "user", "content": "What is the capital of France?"},
    {"role": "assistant", "content": "The capital of France is Paris."},
    {"role": "user", "content": "What about Germany?"}
  ],
  "instructions": "Be concise and informative",
  "reasoning_effort": "medium"
}

Usage Examples

Simple Generation

Use GPT-5 to explain the theory of relativity

Code Review

Ask GPT-5 to review this code and suggest improvements

Creative Writing

Have GPT-5 write a short story about time travel

Technical Analysis

Use GPT-5 with high reasoning to solve this complex algorithm problem

Environment Variables

Create a .env file in the servers directory:

# Required
OPENAI_API_KEY=your-openai-api-key-here

# Optional (for development)
DEBUG=true

Development

Building from Source

# Install dependencies
npm install

# Build the server
npm run build

# Run in development mode
npm run dev

Project Structure

gpt5-mcp/
├── servers/
│   └── gpt5-server/
│       ├── src/
│       │   ├── index.ts      # Main server
│       │   └── utils.ts      # API utilities
│       ├── build/            # Compiled output
│       ├── package.json
│       └── tsconfig.json
└── README.md

Troubleshooting

Server not responding

• Verify your OpenAI API key is valid
• Check that you have GPT-5 access on your account
• Ensure Node.js v18+ is installed

Build errors

# Clean rebuild
rm -rf build/
npm install
npm run build

API errors

• Check your API key has sufficient credits
• Verify GPT-5 model access
• Review rate limits on your OpenAI account

Security

• API keys are never hardcoded
• Environment variables for sensitive data
• Secure HTTPS communication with OpenAI
• Error messages don't expose sensitive information

Contributing

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

License

MIT License - see LICENSE file for details

Acknowledgments

• Built with Model Context Protocol
• Powered by OpenAI GPT-5
• TypeScript SDK by @modelcontextprotocol

Support

• Issues: GitHub Issues
• Discussions: GitHub Discussions

Special Thanks

💡 Inspired by: All About AI - Thanks for the awesome content that sparked this project!

"The future is already here — it's just not evenly distributed." - William Gibson

⭐ Star this repo if you find it useful!