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mcp/harbor
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libofcongress mcp server MCP

v0.6.1 changelog · 11

io.github.cyanheads/libofcongress-mcp-server

Search LOC digital collections, Chronicling America newspapers (full OCR), and LC Subject Headings.

transport:streamable-http runtime:npm tools:6
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Target client

run in your project directory 

claude mcp add --transport http libofcongress-mcp-server https://libofcongress.caseyjhand.com/mcp

setup guides: Claude Code Claude Desktop Cursor VS Code Zed Windsurf Cline Gemini CLI Grok ChatGPT Claude.ai LangChain

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs

libofcongress_search_items

libofcongress search items

libofcongress_get_item

libofcongress get item

libofcongress_search_newspapers

libofcongress search newspapers

libofcongress_get_newspaper_page

libofcongress get newspaper page

libofcongress_search_subjects

libofcongress search subjects

libofcongress_browse_collections

libofcongress browse collections

All 6 tools, one page each

1 resource you attach as context

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. Check the server's own documentation before granting access.