Libofcongress MCP Server

Unclaimed

by cyanheads

Search LOC digital collections, browse Chronicling America newspapers with full OCR text, and look up LC Subject Headings via MCP. STDIO or Streamable HTTP.

bunchronicling-americadigital-collectionshistorical-researchlcshlibrary-of-congresslocmcpmcp-servermodel-context-protocolnewspapersstdiostreamable-httpsubject-headingstypescript

Install

$docker run --rm -p 3010:3010 libofcongress-mcp-server

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Tools (10)

collection_slug

scopes the search to one curated collection — pass a slug from libofcongressbrowsecollections. Mutually exclusive with format (each selects a different LOC endpoint); an unknown slug returns collectionnotfound

count

field indicates approximate number of LOC items carrying that heading (when available)

libofcongress_browse_collections

List and browse LOC curated digital collections with descriptions, item counts, and slugs. Optionally filter by keyword.

libofcongress_get_item

Retrieve full metadata for a specific LOC item — contributors, subjects, summary, languages, locations, rights, physical description, call number, formats, access restrictions, resource links (TIFF/JPEG/PDF), and related items.

libofcongress_get_newspaper_page

Retrieve the full OCR text of a specific newspaper page. Pass the url field from a libofcongresssearchnewspapers result. Returns ocravailable: false when the page has no digitized text.

libofcongress_search

Search LOC digital collections by keyword with optional format, date range, subject heading, geographic location, and collection filters. Returns item summaries with IDs for follow-up retrieval.

libofcongress_search_newspapers

Search historical newspaper pages in the Chronicling America corpus. Returns pages with OCR text excerpts (~500 chars), publication title, date, state, and the URL needed for libofcongressgetnewspaperpage.

libofcongress_search_subjects

Search Library of Congress Subject Headings (LCSH) by keyword. Returns controlled-vocabulary labels and URIs — use the label as the subject filter in libofcongresssearch.

related_items

lists IDs of related LOC items for follow-up retrieval

resource_links

contains URLs to downloadable digital files (TIFF, JPEG, PDF) for items with digital surrogates