Search LOC digital collections, browse Chronicling America newspapers with full OCR text, and look up LC Subject Headings via MCP. STDIO or Streamable HTTP.
Latest release v0.5.1 — v0.5.1: Newspaper match passages, item IDs, imprints, LCCN links · 15 Oct 2026
2 files for Codex, OpenCode and Claude Code: libofcongress-mcp-server AGENTS.md, libofcongress-mcp-server CLAUDE.md — 15,908 tokens loaded in every session.
AGENTS.md A 7,954 tok CLAUDE.md A 7,954 tok These files are cyanheads/libofcongress-mcp-server's own configuration — they tell Codex, OpenCode and Claude Code how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.