chatgpt-interlocutor

An MCP server that gives Claude Code a ChatGPT second opinion. Cross-model adversarial review without leaving your terminal.

When you're working in Claude Code, sometimes you want a second perspective — a different model's take on the same problem. Not because one is better, but because disagreement surfaces blind spots.

This server adds two tools to every Claude Code session:

• `ask_chatgpt` — Send a question to ChatGPT and get its response inline. Second opinions, alternative approaches, sanity checks.
• `compare_approaches` — Send the same prompt to both models and get a structured comparison. Specificity, depth, accuracy, voice.

You need an OpenAI API key.

Add this to your ~/.claude.json under mcpServers:

{
  "mcpServers": {
    "chatgpt-interlocutor": {
      "command": "npx",
      "args": ["-y", "chatgpt-interlocutor"],
      "env": {
        "OPENAI_API_KEY": "sk-your-key-here"
      }
    }
  }
}

Restart Claude Code. You should see ask_chatgpt and compare_approaches in your available tools.

npm install -g chatgpt-interlocutor

Then configure with the direct path:

{
  "mcpServers": {
    "chatgpt-interlocutor": {
      "command": "chatgpt-interlocutor",
      "env": {
        "OPENAI_API_KEY": "sk-your-key-here"
      }
    }
  }
}

Get a second opinion from ChatGPT.

| Parameter | Type | Default | Description | |-----------|------|---------|-------------| | prompt | string | *required* | The question or task to send | | model | string | gpt-4o-mini | gpt-4o-mini, gpt-4o, or o3-mini | | system | string | — | Optional system prompt for context | | temperature | number | 0.7 | Creativity 0–2. Lower = more focused |

Benchmark Claude's output against ChatGPT's on the same task.

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