Research Paper & DOI Lookup (Crossref) for ChatGPT

io.github.pcp183/paper-lookup

Resolve DOIs and search 150M+ scholarly works (Crossref): authors, journal, citations. x402.

client:ChatGPT transport:streamable-http tools:1

Install Research Paper & DOI Lookup (Crossref) in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://paper-lookup-production-56b0.up.railway.app/mcp

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