Spiderbrain MCP Server: Install & Setup

Install Spiderbrain in Claude Code

Remote URL

Claude Code

claude mcp add --transport http spiderbrain https://mcp.spiderbrain.ai/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "spiderbrain": {
      "url": "https://mcp.spiderbrain.ai/mcp"
    }
  }
}

npm

Claude Code

claude mcp add spiderbrain -e SPIDERBRAIN_ROOT=... -- npx -y spiderbrain

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "spiderbrain": {
      "command": "npx",
      "args": [
        "-y",
        "spiderbrain"
      ],
      "env": {
        "SPIDERBRAIN_ROOT": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the Spiderbrain MCP server do?

Deterministic context layer for your codebase: change impact, blast radius, answers with receipts.

Is the Spiderbrain MCP server free?

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Does Spiderbrain run locally or remotely?

Local + Remote. Can run locally or be used as a hosted remote server.

How do I add Spiderbrain to Claude Code?

Run: claude mcp add --transport http spiderbrain https://mcp.spiderbrain.ai/mcp

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