Brainstorm MCP Server Lets Claude Code Consult Other LLMs for Better Answers

A developer has created an MCP server called "brainstorm-mcp" that gives Claude Code a "phone a friend" capability, allowing it to consult with other AI models before delivering answers. This approach addresses situations where a single model's perspective might be insufficient for complex technical decisions.

How It Works

When you ask Claude Code to brainstorm a problem, it doesn't just forward your question to other models. Instead, it initiates a multi-round debate where:

• Claude reads responses from GPT and DeepSeek
• It disagrees where it thinks they're wrong
• All models refine their positions across rounds
• The other models see Claude's responses and adjust their own

Example: AI Code Review Tool Design

The source provides a concrete example of the debate process:

• GPT-5.2: Proposed an enterprise system with Neo4j graph DB, OPA policies, Kafka, multi-pass LLM reasoning
• DeepSeek: Went even bigger — fine-tuned CodeLlama 70B, custom GNNs, Pinecone
• Claude: "This should be a pipeline, not a monolith. Keep the stack boring. Use pgvector not Pinecone. Ship semantic review first, add team learning in v2."

In round 2, both other models adjusted: GPT-5.2 agreed on pgvector, and DeepSeek dropped the custom models. All three converged on FastAPI + Postgres + tree-sitter + hosted LLM.

The entire process took 75 seconds and cost $0.07.

Setup and Configuration

To use this with Claude Code, add the following to your .mcp.json file:

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

Then simply tell Claude: "Brainstorm the best approach for [your problem]"

Compatibility

The tool works with OpenAI, DeepSeek, Groq, Mistral, Ollama — essentially any OpenAI-compatible API.

Resources

• Full debate output: GitHub Gist
• GitHub repository: spranab/brainstorm-mcp
• npm: npx brainstorm-mcp