brainstorm-mcp

Multi-model AI brainstorming MCP server. Orchestrates debates between GPT, Gemini, DeepSeek, and Claude with structured synthesis. Includes instant quick mode, multi-model code review with verdicts, and red-team/Socratic styles. Hosted mode needs zero API keys.

Don't trust one AI. Make them argue.

Demo

Click to watch: 3 models debate, cross-examine, and produce a structured verdict — all inside Claude Code.

Features

• Hosted mode — No API keys needed. Uses models in your environment (Claude Opus/Sonnet/Haiku) via sub-agents
• API mode — Direct model API calls with parallel execution across OpenAI, Gemini, DeepSeek, Groq, Ollama
• brainstorm_quick — Instant multi-model perspectives in under 10 seconds
• brainstorm_review — Multi-model code review with structured findings, severity ratings, and verdicts
• Debate styles — Freeform, red-team (adversarial), and Socratic (probing questions)
• Context injection — Ground debates in actual code, diffs, or architecture docs
• 3-bullet synthesis verdicts — Recommendation, Key Tradeoffs, Strongest Disagreement
• Claude as participant — Claude debates alongside external models with full conversation context
• Multi-round debates — Models see and critique each other's responses across rounds
• Parallel execution — All models respond concurrently within each round
• Resilient — One model failing doesn't abort the debate
• Cross-platform — Works on macOS, Windows, and Linux

Installation

Claude Code

Add to your project's .mcp.json:

{
  "mcpServers": {
    "brainstorm": {
      "command": "npx",
      "args": ["-y", "brainstorm-mcp"],
      "env": {
        "OPENAI_API_KEY": "sk-...",
        "GEMINI_API_KEY": "AIza...",
        "DEEPSEEK_API_KEY": "sk-..."
      }
    }
  }
}

Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "brainstorm": {
      "command": "npx",
      "args": ["-y", "brainstorm-mcp"],
      "env": {
        "OPENAI_API_KEY": "sk-...",
        "DEEPSEEK_API_KEY": "sk-..."
      }
    }
  }
}

Manual Install

npm install -g brainstorm-mcp
brainstorm-mcp

Hosted mode requires no API keys — just install and go. The host (Claude Code) executes prompts using its own model access.

Configuration

Option 1: Environment Variables (simplest)

OPENAI_API_KEY=sk-...
GEMINI_API_KEY=AIza...
DEEPSEEK_API_KEY=sk-...

Option 2: Config File (full control)

Set BRAINSTORM_CONFIG to point to a JSON config:

{
  "providers": {
    "openai": { "model": "gpt-5.4", "apiKeyEnv": "OPENAI_API_KEY" },
    "gemini": { "model": "gemini-2.5-flash", "apiKeyEnv": "GEMINI_API_KEY" },
    "deepseek": { "model": "deepseek-chat", "apiKeyEnv": "DEEPSEEK_API_KEY" },
    "ollama": { "model": "llama3.1", "baseURL": "http://localhost:11434/v1" }
  }
}

Known providers (openai, gemini, deepseek, groq, mistral, together) don't need a baseURL.

Tools

... View full README on GitHub