# With Gemini (free tier)
claude mcp add second-opinion -s user -e GEMINI_API_KEY=your-key -- npx @mrssoftwares/second-opinion-mcp

# With OpenAI
claude mcp add second-opinion -s user -e OPENAI_API_KEY=your-key -- npx @mrssoftwares/second-opinion-mcp

# With Groq (free tier)
claude mcp add second-opinion -s user -e GROQ_API_KEY=your-key -- npx @mrssoftwares/second-opinion-mcp

# With DeepSeek
claude mcp add second-opinion -s user -e DEEPSEEK_API_KEY=your-key -- npx @mrssoftwares/second-opinion-mcp

{
  "mcpServers": {
    "second-opinion": {
      "command": "npx",
      "args": ["@mrssoftwares/second-opinion-mcp"],
      "env": {
        "GEMINI_API_KEY": "your-key-here"
      }
    }
  }
}

git clone https://github.com/mauricioreiss/second-opinion-mcp.git
cd second-opinion-mcp
npm install && npm run build

{
  "verdict": "NO",
  "confidence": "HIGH",
  "answer": "Usar eval() para parsing de JSON e inseguro. Use JSON.parse().",
  "evidence": [
    "eval() executa codigo arbitrario, permitindo injecao de codigo",
    "JSON.parse() rejeita JSON invalido sem executar codigo"
  ],
  "provider": "gemini",
  "model": "gemini-2.5-flash"
}

{
  "verdict": "FAIL",
  "score": 3,
  "criteria": [
    {
      "name": "security",
      "status": "FAIL",
      "findings": [
        {
          "severity": "HIGH",
          "line": 5,
          "issue": "SQL injection via string interpolation",
          "fix": "Use parameterized queries: db.query('SELECT * FROM users WHERE id = $1', [id])"
        }
      ]
    }
  ],
  "summary": "Vulnerabilidade critica de SQL injection encontrada.",
  "provider": "gemini",
  "model": "gemini-2.5-flash"
}

{
  "verdict": "PARTIAL",
  "confidence": "MEDIUM",
  "explanation": "Redis WATCH monitora chaves, mas nao garante isolamento total como locks tradicionais.",
  "caveats": [
    "WATCH usa optimistic locking, nao bloqueia outros clientes",
    "A transacao precisa ser re-tentada manualmente apos abort"
  ],
  "docs_to_check": [
    "Redis WATCH command docs",
    "Redis transactions documentation"
  ],
  "provider": "gemini",
  "model": "gemini-2.5-flash"
}

{
  "winner": "APPROACH_A",
  "confidence": "HIGH",
  "comparison": [
    {
      "criterion": "performance",
      "winner": "TIE",
      "reason": "Ambos operam em microsegundos para operacoes simples de key-value"
    },
    {
      "criterion": "features",
      "winner": "APPROACH_A",
      "reason": "Redis tem TTL nativo e pub/sub, facilitando gerenciamento de sessoes"
    }
  ],
  "recommendation": "Redis e a melhor escolha para sessoes. TTL nativo elimina logica de expiracao manual.",
  "provider": "gemini",
  "model": "gemini-2.5-flash"
}

Before committing critical code (auth, payments, sensitive data),
use the `second_opinion_review` tool to get an external review.
If the verdict is FAIL or score < 6, fix the issues before proceeding.