AI-Powered Library Cataloging
Generate accurate Library of Congress Subject Headings, validate against official authorities, and export standards-compliant MARC records — all powered by AI.
Three Tools, One Ecosystem
Whether you prefer a full web app, a browser sidebar, or an AI assistant integration, there's an LCSH tool for your workflow.
Cataloging Assistant
A Progressive Web App with a guided 3-step wizard. Enter bibliographic info, get AI-powered LCSH suggestions validated against the Library of Congress, and export MARC records. Works offline, supports multiple AI providers.
Learn more →Chrome Extension
Get LCSH recommendations directly in your browser. Powered by Google Gemini, it validates suggestions against id.loc.gov in the background and generates MARC records — all without leaving your tab.
Learn more →MCP Server
Give Claude and other AI assistants direct access to the Library of Congress authorities database. Search LCSH and LCNAF through the Model Context Protocol with three specialized tools.
Learn more →Why LCSH Tools?
Validated Accuracy
Every AI suggestion is checked in real time against the Library of Congress authorities database. Similarity scores let you see match quality at a glance.
Faster Cataloging
Generate subject headings in seconds instead of minutes. The 3-step wizard takes you from bibliographic input to MARC records in a single session.
Standards-Compliant
Automatically generates properly formatted MARC records (650, 600, 610) with correct indicators and subfields, ready for your ILS.
Privacy-First
Zero-knowledge architecture. All data stays in your browser. API keys are stored locally and never transmitted to any server except your chosen AI provider.
How It Works
Enter Bibliographic Info
Provide the title, author, abstract, table of contents, and optionally upload book covers or title pages.
AI Suggests & Validates
AI analyzes your input and generates LCSH candidates. Each one is validated against the Library of Congress in real time.
Export MARC Records
Review validated headings with similarity scores, then copy MARC records to your clipboard or export as CSV.
Ready to streamline your cataloging?
No sign-up required. Bring your own AI API key and start generating LCSH headings in minutes.