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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.
npx claudepluginhub cyanheads/cyanheads --plugin libofcongress-mcp-serverCanonical reference for the unified `Context` object passed to every tool and resource handler in `@cyanheads/mcp-ts-core`. Covers the full interface, all sub-APIs (`ctx.log`, `ctx.state`, `ctx.elicit`, `ctx.sample`, `ctx.progress`), and when to use each.
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Search LOC digital collections, browse Chronicling America newspapers with full OCR text, and look up LC Subject Headings via MCP. STDIO or Streamable HTTP.
Public Hosted Server: https://libofcongress.caseyjhand.com/mcp
Six tools covering the Library of Congress digital holdings — general search with format/date/subject/location filters, full item retrieval, Chronicling America newspaper search with OCR, single-page full-text fetch, LCSH subject heading lookup, and curated collection browsing:
| Tool | Description |
|---|---|
libofcongress_search | Search LOC digital collections by keyword with optional format, date range, subject heading, and geographic location filters. Returns item summaries with IDs for follow-up retrieval. |
libofcongress_get_item | Retrieve full metadata for a specific LOC item — contributors, subjects, rights, physical description, resource links (TIFF/JPEG/PDF), and related items. |
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 libofcongress_get_newspaper_page. |
libofcongress_get_newspaper_page | Retrieve the full OCR text of a specific newspaper page. Pass the url field from a libofcongress_search_newspapers result. Returns ocr_available: false when the page has no digitized text. |
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 libofcongress_search. |
libofcongress_browse_collections | List and browse LOC curated digital collections with descriptions, item counts, and slugs. Optionally filter by keyword. |
libofcongress_searchSearch the LOC digital collections with full-text keyword matching and facet filters.
photo, map, newspaper, manuscript, audio, film, book, notated-musiclibofcongress_search_subjects first to get the exact LCSH spelling"oklahoma", "washington d.c.")message field with recovery hints — echoes the applied filterslibofcongress_get_itemRetrieve the full metadata record for a specific LOC digital item.