🇨🇭 Part of the Swiss Public Data MCP Portfolio

🏛️ eth-library-mcp

🌐 English | Deutsch

MCP server giving AI models direct access to 30M+ resources at ETH Library Zurich – books, maps, images, archival material, and linked-data person records.

Demo

Demo: Claude using eth_search_archive to find historical school documents

Overview

eth-library-mcp connects AI assistants like Claude to the largest natural-science library in Switzerland. It exposes full-text search, archive-level queries, resource-type filtering, and person lookups via the ETH Library's Discovery and Persons APIs – all through a single, standardised MCP interface.

7 Tools · 3 APIs · 2 Resources · 2 Prompts

MCP Protocol Version: 2025-06-18 (via mcp[cli]>=1.0.0,<2.0.0).

⚠️ Known issue (BUG-02): The tool eth_search_persons is currently non-functional because the Persons API endpoint returns HTTP 404. The correct URL needs to be verified at developer.library.ethz.ch. All other 6 tools work correctly.

Anchor demo query: "Find historical documents about Zurich school history in the ETH Library archives."

Features

🔍 Full-text search over 30M+ resources with fields, operators, and facets
📖 Resource details – full metadata via MMS-ID
🗂️ Archive search – ETH University Archives, Max Frisch, Thomas Mann, Graphische Sammlung, Bildarchiv
🏷️ Resource type filter – books, maps, images, archival material and more
🎓 Education search – curated workflow optimised for pedagogy and school history
👤 Person search with linked-data enrichment (Wikidata, GND, Metagrid) (BUG-02: currently unavailable)
📋 Server overview – all resource types and archives at a glance
🗣️ Built-in prompts – structured research and education-research workflows
☁️ Dual transport – stdio for Claude Desktop, Streamable HTTP/SSE for cloud deployment

Prerequisites

Python 3.11+
A free API key from developer.library.ethz.ch

Installation

# Clone the repository
git clone https://github.com/malkreide/eth-library-mcp.git
cd eth-library-mcp

# Install
pip install -e .

# Or with uv (recommended)
uv pip install -e .

Quickstart

# Set the API key
export ETH_LIBRARY_API_KEY=your_key_here   # macOS / Linux
# $env:ETH_LIBRARY_API_KEY = "your_key_here"  # Windows (PowerShell)

# Start the server (stdio mode for Claude Desktop)
python -m eth_library_mcp.server

Without an API key the server returns a helpful error message with the registration link – no crashes.

Try it immediately in Claude Desktop:

"Find books about Swiss education history in the ETH Library." "Search the Max Frisch archive for manuscripts about Zurich."

→ More use cases by audience →

Configuration

Environment Variables

Variable	Description	Required
`ETH_LIBRARY_API_KEY`	API key for Discovery & Persons API	✅

Claude Desktop Configuration

{
  "mcpServers": {
    "eth-library": {
      "command": "python",
      "args": ["-m", "eth_library_mcp.server"],
      "env": {
        "ETH_LIBRARY_API_KEY": "your_key_here"
      }
    }
  }
}

Config file locations:

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

Cloud Deployment (SSE for browser access)

For use via claude.ai in the browser (e.g. on managed workstations without local software):

python -m eth_library_mcp.server --http --port 8000

The HTTP transport binds to 127.0.0.1 by default. To expose it on another interface, pass --host explicitly:

# Only behind a reverse-proxy / firewall that terminates TLS and enforces auth.
python -m eth_library_mcp.server --http --host 0.0.0.0 --port 8000

⚠️ Do not bind to 0.0.0.0 without a reverse proxy. The server has no built-in auth, rate-limiting or TLS — any LAN neighbour could call your tools.

💡 "stdio for the developer laptop, HTTP for the browser — behind a proxy."

Available Tools

Discovery API (api.library.ethz.ch)

Tool	Description
`eth_search_resources`	Full-text search over 30M+ resources with fields, operators, facets
`eth_get_resource`	Full metadata for a specific resource via MMS-ID
`eth_search_archive`	Search within a specific archive (University Archives, Max Frisch, Thomas Mann, etc.)
`eth_search_by_type`	Filter by resource type (books, maps, images, archival material, etc.)
`eth_search_education`	Curated search for education topics (pedagogy, school history, etc.)

Persons API

Tool	Description
`eth_search_persons`	Person search with linked-data enrichment (Wikidata, GND, Metagrid) — ⚠️ BUG-02

Utilities

Tool	Description
`eth_library_info`	Server overview: all types and archives at a glance

Resources & Prompts

Item	Type	Description
`eth://resource-types`	Resource	All available resource types
`eth://archives`	Resource	All available archives and collections
`research-workflow`	Prompt	Structured research workflow
`education-research`	Prompt	Education topics workflow (Schulamt-optimised)

Query Syntax

The Discovery API uses structured queries:

field,operator,value

Field	Meaning
`any`	All fields (recommended for starters)
`title`	Title only
`creator`	Author / creator
`sub`	Subject headings / topics

Operator	Meaning
`contains`	Term is present
`exact`	Exact match
`begins_with`	Starts with

Examples:

any,contains,Volksschule Zürich
title,contains,Pädagogik
creator,exact,Einstein Albert
sub,contains,Bildungsforschung
title,contains,Schule;sub,contains,Geschichte

Available Archives

Identifier	Description
`ETH_Hochschularchiv`	Institutional memory of ETH Zurich
`ETH_MaxFrischArchiv`	Estate of Swiss author Max Frisch
`ETH_ThomasMannArchiv`	Letters and documents of Thomas Mann
`ETH_GraphischeSammlung`	Prints, drawings, graphic works
`ETH_Bildarchiv`	Science/technology history, Swissair (E-Pics)

Example Use Cases

Query	Tool
"Find books about Zurich school history"	`eth_search_education`
"What's in the Max Frisch archive?"	`eth_search_archive`
"Find historical maps of Switzerland"	`eth_search_by_type`
"Get full metadata for resource ID 991170525863705501"	`eth_get_resource`
"Which archives does the ETH Library hold?"	`eth_library_info`

Project Structure

eth-library-mcp/
├── src/
│   └── eth_library_mcp/
│       ├── __init__.py        # Package init, version
│       └── server.py          # FastMCP server, all tools
├── tests/
│   └── test_server.py         # Unit tests
├── CHANGELOG.md
├── CONTRIBUTING.md             # Contribution guide (English)
├── CONTRIBUTING.de.md          # Contribution guide (German)
├── SECURITY.md                 # Security posture (English)
├── SECURITY.de.md              # Security posture (German)
├── LICENSE
├── README.md                  # This file (English)
├── README.de.md               # German version
├── claude_desktop_config.json # Example Claude Desktop configuration
└── pyproject.toml             # Build configuration

Testing

# Unit tests (no API key required)
PYTHONPATH=src pytest tests/ -m "not live"

# Integration tests (API key required)
ETH_LIBRARY_API_KEY=xxx pytest tests/ -m "live"

Safety & Limits

Read-only: All tools perform HTTP GET requests only — no data is written, modified, or deleted.
No personal data: The APIs return bibliographic metadata (titles, authors, subjects, identifiers). No personally identifiable information (PII) is processed or stored by this server.
Authentication: A free API key from developer.library.ethz.ch is required. The key is read from the ETH_LIBRARY_API_KEY environment variable and never logged or transmitted to third parties.
Rate limits: The ETH Library API enforces rate limits per API key. The server enforces a 30-second timeout per request. Use limit and offset parameters conservatively.
Data freshness: Results reflect the ETH Library catalogue at query time. No caching is performed by this server.
Terms of service: Bibliographic metadata is published as Public Domain — free for all uses. API access is subject to the ETH Library Developer Portal terms.
Known issue (BUG-02): eth_search_persons returns HTTP 404 — the Persons API endpoint URL needs verification. All other 6 tools work correctly.
No guarantees: This is a community project, not affiliated with the ETH Library or ETH Zurich. Availability depends on upstream APIs.

Contributing

Contributions are welcome! See CONTRIBUTING.md (Deutsch) for guidelines.

Security

Read-only, no PII, a single upstream API key, and a fixed egress allow-list of ETH Library endpoints. See SECURITY.md (Deutsch) for the full security posture and accepted-risk decisions.

Changelog

See CHANGELOG.md

License

Server code: MIT License — see LICENSE
Bibliographic metadata: Public Domain (no restrictions)
API documentation: developer.library.ethz.ch

Author

Hayal Oezkan · github.com/malkreide

Powered by Model Context Protocol • 2 APIs • 7 Tools • 2 Resources • 2 Prompts

Installation

Run via uv's uvx — no clone or manual install needed. Add to your MCP client config (mcpServers for Claude Desktop, Cursor and Windsurf; use a top-level servers key for VS Code in .vscode/mcp.json):

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