openai-mcp

Use your ChatGPT Plus or Pro subscription inside Claude Code, Codex, and other AI coding tools.

One command to set up. Works in the background. Your account, your quota.

Quick start

pip install git+https://github.com/robotlearning123/chatgpt2agent.git
openai-mcp setup

That's it. The setup wizard will:

1. Log you into ChatGPT (opens your browser)
2. Detect your plan (Plus or Pro)
3. Start a local server
4. Register it with Claude Code automatically

Restart Claude Code when done.

What you get

Tools available inside Claude Code after setup:

Example prompts in Claude Code:

"Use deep_research to find recent papers on diffusion transformers"

"Use chat with model gpt-5-5-pro to review this architecture"

"Use image_gen to create a diagram of this system"

Requirements

• Python 3.10+
• A ChatGPT Plus ($20/mo) or Pro ($200/mo) subscription
• Claude Code, Codex CLI, or any MCP-compatible agent

How it works

Your ChatGPT account
        ↓
  local gateway  :3001   (handles auth, talks to ChatGPT)
        ↓
   MCP server    :9000   (Claude Code connects here)
        ↓
  Claude Code tools: chat / deep_research / image_gen

Everything runs locally on your machine. No data leaves except to OpenAI/ChatGPT — the same as using ChatGPT directly.

The server starts automatically at login (macOS LaunchAgent) and restarts if it crashes.

Connecting other tools

Any MCP client — add this to its config:

{
  "mcpServers": {
    "openai": {
      "type": "url",
      "url": "http://localhost:9000/mcp"
    }
  }
}

Any HTTP client / Python script:

from openai import OpenAI

client = OpenAI(
    base_url="http://localhost:3001/v1",
    api_key="openai-mcp-local"
)
resp = client.chat.completions.create(
    model="gpt-5-5-pro",
    messages=[{"role": "user", "content": "Hello"}]
)

Commands

openai-mcp setup          # First-time setup (login + register)
openai-mcp run            # Start server manually
openai-mcp run --stdio    # stdio mode (Claude Code legacy config)

Troubleshooting

"Tools not showing in Claude Code" → Restart Claude Code after setup.

"Login failed / token expired" → Re-run openai-mcp setup. It refreshes your token.

"deep_research not available" → Requires ChatGPT Plus or Pro plan.

Check logs:

tail -f ~/.openai-mcp/mcp.log
tail -f ~/.openai-mcp/chatgpt2api.log

Restart server:

launchctl stop com.user.openai-mcp
launchctl start com.user.openai-mcp

Disclaimer

Personal, non-commercial use only.

This tool runs on your own machine using your own ChatGPT account. It does not bypass or resell OpenAI's services. You are responsible for complying with OpenAI's Terms of Service.

Do not expose the local server to the internet or share your token.

Not affiliated with OpenAI or Anthropic.

License

MIT — personal use only, commercial use not permitted.