NotebookLM MCP Server for Antigravity

This repository contains the configuration and workflows to set up the NotebookLM MCP Server for use with Antigravity, Opencode (and other MCP clients).

It specifically addresses and fixes the "invalid trailing data" error caused by the startup banner of the notebooklm-mcp-server package.

Features

Automated Setup Workflow: A comprehensive workflow (.agent/workflows/setup-notebooklm-mcp.md) to install and configure the server.
Banner Suppression Fix: Includes a wrapper script (run_mcp.py) that filters out the ASCII art banner from stdout, ensuring clean JSON-RPC communication.
Antigravity Integration: Ready-to-use configuration for Antigravity's mcp_config.json.

Prerequisites

Python 3.10+
pip
An active Google account with access to NotebookLM

Installation

You can use the provided workflow in Antigravity or follow these manual steps:

Install the package:
```
pip install notebooklm-mcp-server
```
Clone this repository (or copy the files) to your desired location (e.g., d:\antigravity\notebooklm).
Authenticate:
```
notebooklm-mcp-auth
```
Follow the browser prompts to log in.

Configure Antigravity: Add the following to your C:\Users\Administrator\.gemini\antigravity\mcp_config.json:

{
  "mcpServers": {
    "notebooklm-mcp-server": {
      "command": "python",
      "args": [
        "-u",
        "-W",
        "ignore",
        "d:\\antigravity\\notebooklm\\run_mcp.py"
      ],
      "env": {
        "PYTHONUNBUFFERED": "1",
        "PYTHONWARNINGS": "ignore"
      }
    }
  }
}

Note: Adjust the path to run_mcp.py if you placed it elsewhere.

Reload Antigravity: Restart the application or reload the window (Ctrl+Shift+P -> Developer: Reload Window).

Usage

Once configured, you can use Antigravity to interact with your NotebookLM notebooks.

List Notebooks: Ask "List my notebooks"
Query Notebooks: Ask questions about your documents.
Add Sources: Add URLs or text to your notebooks.

Troubleshooting

"Invalid trailing data" Error

This error occurs when the server prints non-JSON text (like a banner) to stdout. The included run_mcp.py script fixes this by intercepting stdout and removing the banner. Ensure your config points to this script, not the module directly.

Authentication Issues

If you see auth errors, try running notebooklm-mcp-auth again and ensure you complete the login process in the browser.

Files

run_mcp.py: Wrapper script to suppress the startup banner.
.agent/workflows/setup-notebooklm-mcp.md: Antigravity workflow for automated setup.
list_notebooks.py: Utility script to list notebooks (for testing).

MCP Servers