libofcongress mcp server for ChatGPT

io.github.cyanheads/libofcongress-mcp-server

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

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

Install libofcongress mcp server in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://libofcongress.caseyjhand.com/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs