"author:si-essence" matching MCP servers:

Enables searching and resolving academic paper metadata across arXiv, Crossref, OpenAlex, Europe PMC, PubMed, and DOAJ, merging duplicate records and returning titles, authors, abstracts, and landing/PDF links. It also supports open-access location lookup via Unpaywall, citation and reference retrieval, author search, open-access full text, and BibTeX/RIS citation export.