OpenAI MCP server

This is a small helper that connects Claude to OpenAI's chat models. Once it is set up, you can ask Claude to pass a question along to gpt-4o or o1 and show you what they say. It is handy if you already use Claude but sometimes want a second opinion from a different model.

What this MCP server does

You type a request in Claude, like asking what another model thinks about something. Claude notices it needs OpenAI for this and calls this helper. The helper sends your message to OpenAI's chat service using your API key. OpenAI replies, and the helper hands that reply back to Claude. Claude then shows you the answer right in the chat.

Click to zoom

What you can do with it

• Ask gpt-4o a question and read its answer inside Claude
• Ask o1-preview or o1-mini to think through a tricky problem
• Get a second opinion from a different model on something you wrote
• Compare how two models respond to the same prompt
• Use the smaller gpt-4o-mini when you want a quicker, cheaper reply

Try asking your AI

• “Can you ask o1 what it thinks about this problem?”
• “What does gpt-4o think about this paragraph?”
• “Send this question to gpt-4o-mini and show me the answer.”
• “Ask o1-mini to review my plan and point out anything I missed.”

What it gives back to you

You get the model's reply as text in your Claude chat, just like a normal message. If you asked several models, you get each answer one after another. There are no files or downloads, just the written answer.

Before you start

Who it's for

People who already chat with Claude and want to quickly check what an OpenAI model says, without leaving the Claude window.