Thebrain MCP Server

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

claude mcp add thebrain -- npx -y thebrain-mcp-server

{
  "mcpServers": {
    "thebrain": {
      "args": [
        "-y",
        "thebrain-mcp-server"
      ],
      "command": "npx"
    }
  }
}

[mcp_servers.thebrain]
command = "npx"
args = ["-y", "thebrain-mcp-server"]

{
  "mcpServers": {
    "thebrain": {
      "args": [
        "-y",
        "thebrain-mcp-server"
      ],
      "command": "npx"
    }
  }
}

{
  "mcpServers": {
    "thebrain": {
      "args": [
        "-y",
        "thebrain-mcp-server"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: THEBRAIN_API_KEY (Local API key from TheBrain: Settings > User > Local API Key), THEBRAIN_BASE_URL (Address of the local API. Default http://localhost:8001), THEBRAIN_DATA_DIR (Where semantic indexes are stored. Default ~/.thebrain-mcp), THEBRAIN_ALLOW_DESTRUCTIVE (Set to 1 to allow deleting thoughts. Deletion still requires human confirmation. Default 0), THEBRAIN_EMBEDDING_MODEL (Embedding model for semantic search. Default Xenova/multilingual-e5-small), THEBRAIN_EMBEDDING_DTYPE (Weight precision: fp32, fp16, q8 or q4. Default q8), THEBRAIN_TIMEOUT_MS (API request timeout in milliseconds. Default 30000). The author declared them in the registry entry; get the values from the project itself.