Local Zotero MCP

An MCP server that gives an LLM read-only access to your local Zotero library via the desktop app's Local API. It talks to Zotero over http://127.0.0.1:23119, so nothing leaves your machine and no API keys are required.

Requirements

• Zotero desktop app, running, with Settings > Advanced > "Allow other applications on this computer to communicate with Zotero" enabled.
• uv installed.

Quickstart

No cloning or installing required - uvx fetches the published package from PyPI and runs it. Add this to your Claude Desktop config (claude_desktop_config.json):

{
  "mcpServers": {
    "zotero": {
      "command": "uvx",
      "args": ["--from", "local-zotero-mcp", "zotero-mcp"]
    }
  }
}

Restart Claude Desktop and the Zotero tools should be available. uvx caches the environment after the first run, so subsequent launches are fast; add --refresh to args if you want to force-pull the latest version.

Tools

Every library-scoped tool takes an optional library argument - "user" (default) for your personal library, or a group ID to read a group library synced locally. Use list_groups to find group IDs.

The two tools below have no equivalent in the Zotero Web API - they read the attachment file resolved by get_attachment_file_path and process it locally with PyMuPDF.

Local development

Clone the repo and install it locally:

uv sync

Run it directly from the checkout:

uv run zotero-mcp

Point Claude Desktop at your local checkout instead of GitHub with:

{
  "mcpServers": {
    "zotero": {
      "command": "uv",
      "args": ["run", "--directory", "/path/to/Local-Zotero-MCP", "zotero-mcp"]
    }
  }
}

Run the tests:

uv run pytest

Tests mock the Zotero HTTP responses, so a running Zotero instance isn't required. To smoke-test against your own Zotero library:

uv run mcp dev zotero_mcp/server.py