Mendeley MCP Server

An MCP (Model Context Protocol) server that connects your Mendeley reference library to LLM applications like Claude Desktop, Cursor, and other MCP-compatible clients.

Features

• Search your library - Find papers by title, author, abstract, or notes
• Manage folders - Browse, create, rename, delete, and nest collections
• Get full metadata - Retrieve complete document details including abstracts
• Search global catalog - Access Mendeley's 100M+ paper database
• DOI lookup - Find papers by their DOI
• Add documents - Create new entries in your library
• Download attached files - Retrieve document files when Mendeley exposes them

Prerequisites

1. Mendeley Account - Sign up at mendeley.com (uses Elsevier authentication)
2. Mendeley API App - Register at dev.mendeley.com/myapps.html
   • Sign in with your Elsevier credentials
   • Click "Register a new app"
   • Set redirect URL to http://localhost:8585/callback
   • Select "Authorization code" flow (not Legacy)
   • Note your Client ID and Client Secret

Installation

Using pip

pip install mendeley-mcp

Using uv (recommended)

uv tool install mendeley-mcp

Using Docker

docker run -it \
  -e MENDELEY_CLIENT_ID="your-client-id" \
  -e MENDELEY_CLIENT_SECRET="your-client-secret" \
  -e MENDELEY_REFRESH_TOKEN="your-refresh-token" \
  ghcr.io/pallaprolus/mendeley-mcp

Or build locally:

git clone https://github.com/pallaprolus/mendeley-mcp.git
cd mendeley-mcp
docker build -t mendeley-mcp .

From source

git clone https://github.com/pallaprolus/mendeley-mcp.git
cd mendeley-mcp
pip install -e .

Quick Start

1. Authenticate with Mendeley

Run the authentication wizard:

mendeley-auth login

This will:

1. Prompt for your Client ID and Client Secret
2. Open your browser to authorize the app
3. Save your credentials securely in your system keyring

2. Add to Claude Desktop

Edit your Claude Desktop config file:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
Linux: ~/.config/Claude/claude_desktop_config.json
Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "mendeley": {
      "command": "mendeley-mcp"
    }
  }
}

If installed with uv:

{
  "mcpServers": {
    "mendeley": {
      "command": "uvx",
      "args": ["mendeley-mcp"]
    }
  }
}

3. Restart Claude Desktop

The Mendeley tools should now be available in Claude.

Available Tools

Tool Reference

mendeley_search_library

Use this when the paper should already exist in the user's library.

• Searches title, authors, abstract, and notes
• Returns concise metadata, formatted citation text, and has_pdf
• Best first step before falling back to the catalog

mendeley_get_document

Use this after you already know the library document_id.

• Returns fuller metadata than the search tool
• Includes identifiers, keywords, tags, timestamps, abstract, and PDF presence
• Best for inspection, summarization, and follow-up actions on a known document

mendeley_list_documents

Use this to browse the library instead of searching by keyword.

• Can scope results to a specific folder_id
• Supports sorting by last_modified, created, or title
• Useful for reviewing recent additions or the contents of one collection

mendeley_list_folders

Use this to understand the collection hierarchy before listing documents by folder.

• Returns folder IDs and names
• Includes parent_id to reconstruct nesting
• Useful when an LLM needs to navigate a library structure safely

mendeley_search_catalog

Use this when the reference is not in the user's library or when you want broader discovery.

• Searches Mendeley's global catalog
• Returns catalog_id, summary metadata, and truncated abstract text
• Good fallback when mendeley_search_library does not find a match

mendeley_get_by_doi

Use this when a DOI is known and you want a higher-confidence lookup than free-text search.

• Resolves the DOI in the Mendeley catalog
• Returns catalog_id plus richer catalog metadata
• Useful before mendeley_add_document or mendeley_get_file_content

mendeley_add_document

Use this to create a library entry from metadata you already have.

• Creates a new Mendeley library record
• Accepts title, authors, year, source, abstract, and identifiers
• Does not upload a PDF by itself

mendeley_get_file_content

Use this to try downloading the first file Mendeley exposes for a library document or catalog hit.

• Accepts either a library document_id or a catalog_id
• Returns structured metadata and an embedded PDF resource when available
• If no file exists, returns a clear no-file result instead of failing silently
• Catalog results often have no downloadable attachment for copyright or licensing reasons
• Files larger than 10 MB are reported but not embedded, to avoid flooding the client's context window (adjust with the MENDELEY_MCP_MAX_FILE_BYTES environment variable)

Example Usage

Once configured, you can ask Claude things like:

• "Search my Mendeley library for papers about transformer architectures"
• "What papers do I have in my 'Machine Learning' folder?"
• "Find the paper with DOI 10.1038/nature14539 and summarize it"
• "Search the Mendeley catalog for recent papers on protein folding"
• "Add this paper to my library: [title, authors, etc.]"
• "Create a folder called 'Systematic Review 2026' in my Mendeley library"
• "Create a subfolder called 'Screening' under folder ID folder-123"
• "Create a folder called 'Weekly Reading' in group group-456"
• "Rename folder folder-123 to 'Included Studies'"
• "Delete folder folder-999 from my Mendeley library"
• "Add document doc-789 to folder folder-123"
• "Download the PDF attached to the paper about protein folding"

For direct tool calls in an MCP client or inspector, the folder-management tools accept inputs like:

Create a root folder:

{
  "name": "Systematic Review 2026"
}

Create a subfolder:

{
  "name": "Screening",
  "parent_id": "folder-123"
}

Rename a folder:

{
  "folder_id": "folder-123",
  "name": "Included Studies"
}

Delete a folder:

{
  "folder_id": "folder-999"
}

Add a document to a folder:

{
  "folder_id": "folder-123",
  "document_id": "doc-789"
}

Folder Management Validation

• mendeley_create_folder requires a non-empty name. You can optionally provide parent_id for nested creation or group_id for a group-scoped folder.
• mendeley_rename_folder requires non-empty folder_id and name.
• mendeley_delete_folder requires a non-empty folder_id.
• mendeley_add_document_to_folder requires non-empty folder_id and document_id.
• Required string inputs are trimmed before the request is sent. Blank or whitespace-only required values return a JSON error response instead of attempting the write.
• Optional parent_id and group_id values are trimmed when provided and then forwarded upstream without additional local business rules.
• Rename and delete operations surface upstream missing-folder, access, or context errors as JSON error responses instead of false success payloads.

mendeley_get_file_content accepts either a library document ID or a catalog_id. Catalog
entries often do not have downloadable files, so a no-file result is expected in many cases.

Configuration

Environment Variables

If you prefer not to use mendeley-auth login, you can configure credentials via environment variables:

# Required
export MENDELEY_CLIENT_ID="your-client-id"
export MENDELEY_CLIENT_SECRET="your-client-secret"

# One of the following (refresh token recommended - access tokens expire quickly)
export MENDELEY_REFRESH_TOKEN="your-refresh-token"
# OR
export MENDELEY_ACCESS_TOKEN="your-access-token"

Or in your MCP config:

{
  "mcpServers": {
    "mendeley": {
      "command": "mendeley-mcp",
      "env": {
        "MENDELEY_CLIENT_ID": "your-client-id",
        "MENDELEY_CLIENT_SECRET": "your-client-secret",
        "MENDELEY_REFRESH_TOKEN": "your-refresh-token"
      }
    }
  }
}

Auth Commands

# Check authentication status
mendeley-auth status

# Show environment variables for manual config
mendeley-auth show-env

# Remove saved credentials
mendeley-auth logout

Development

Setup

git clone https://github.com/pallaprolus/mendeley-mcp.git
cd mendeley-mcp
python -m venv .venv
source .venv/bin/activate
pip install -e ".[dev]"

Testing

# Run tests
pytest

# Run with coverage
pytest --cov=mendeley_mcp

# Type checking
mypy src/mendeley_mcp

# Linting
ruff check src/

Testing with MCP Inspector

# Install MCP inspector
npm install -g @modelcontextprotocol/inspector

# Run your server with inspector
npx @modelcontextprotocol/inspector mendeley-mcp

Architecture

┌─────────────────┐     ┌──────────────────┐     ┌───────────────────┐
│  Claude Desktop │────▶│  mendeley-mcp    │────▶│   Mendeley API    │
│  (MCP Client)   │◀────│  (MCP Server)    │◀────│ api.mendeley.com  │
└─────────────────┘     └──────────────────┘     └───────────────────┘
                               │
                               ▼
                        ┌──────────────────┐
                        │  Local Keyring   │
                        │  (credentials)   │
                        └──────────────────┘

Important: This server runs locally on your machine. Your credentials and data never pass through any third-party servers - all communication is directly between your computer and Mendeley's API.

Credential Storage: Your OAuth tokens and client secret are stored securely in your system's native keyring (macOS Keychain, Windows Credential Locker, or Linux Secret Service). Only the non-sensitive client ID is stored in ~/.config/mendeley-mcp/credentials.json.

Rate Limits

Mendeley API rate limits are per-user. If you hit rate limits:

• The server implements automatic token refresh
• Wait a few minutes and retry
• For heavy usage, consider spreading requests over time

Troubleshooting

"No credentials found"

Run mendeley-auth login to authenticate.

"Token expired"

Your access token has expired. The server will attempt to refresh it automatically using your refresh token. If this fails, run mendeley-auth login again.

"401 Unauthorized"

Your app may have been deauthorized. Re-authenticate with mendeley-auth login.

Server not appearing in Claude

1. Check the config file path is correct for your OS
2. Ensure JSON is valid (no trailing commas)
3. Restart Claude Desktop completely
4. Check Claude's logs for errors

Contributing

Contributions are welcome! Please:

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Run tests and linting
5. Submit a pull request

License

MIT License - see LICENSE file.

Disclaimer

This project is not affiliated with, endorsed by, or sponsored by Mendeley or Elsevier. Mendeley is a trademark of Elsevier B.V.

Acknowledgments

• Model Context Protocol by Anthropic
• FastMCP Python framework
• Mendeley API documentation