Paper Nexus

npx add-mcp 'https://papernex.us/mcp'

The scientific literature, mapped by its citations

Start from a paper you know. See what it cites, what cites it, and what sits nearby, across 225.6 million scholarly works.

How it works

Three steps from one paper to a reading list

1. 01

   Search

   Type a title or an author, or paste a DOI, PubMed or MAG ID, or a link to the paper.
2. 02

   Explore

   Your paper opens as a graph of related work. Add up to ten origin papers to find the work between topics.
3. 03

   Keep

   Save papers to your library, export them to your reference manager, and hear when new papers cite them.

Where the related papers come from. They are found in the citation network: papers cited alongside your origins, and papers that cite the same work, ranked together. The similarity view then links papers that share authors, keywords, title words and publication years.

The citation map

139 million papers in one picture

Every paper we can place, laid out so that papers citing each other sit together. Nobody drew the fields on; they emerge from the citations.

• Free to browse, no account needed
• Recolor by field group, topic diversity or year
• With a free account, click any spot to list its most cited papers

Citation graphs

Every paper, with its neighbourhood

Switch between the citation view and the similarity view, and lay the graph out by force, on a timeline or radially around your origins.

• Combine several origins for cross-topic searches
• A permanent link for every graph, to share or bookmark
• Your graphs kept in History to come back to

Your library

Keep what you find, and follow it

• Collections and export

  File papers into nested collections and export them as BibTeX, RIS or CSV for Zotero, Mendeley, EndNote and the rest.

• New citations

  Monitor a collection and its new citing papers appear in Updates, with an email digest when there are some.

• Zotero

  On Individual, connect Zotero to pull your library in and send papers back. It only ever adds; nothing in Zotero is deleted.

AI assistants

Use Paper Nexus from Claude, ChatGPT or Cursor

Paper Nexus runs an MCP server, so an assistant can search the literature and pull recommendations for you, with every result linking back here.

1. Add the server as a connector in your assistant.
2. Sign in with your Paper Nexus account and approve it.
3. Ask for papers. Graphs it builds land in your History too.

https://papernex.us/mcp

• search_papers Find a paper by title, DOI or link.
• recommend_papers Related papers for one to ten origins.
• get_paper One paper's details and main references.
• list_citing_papers The papers citing one paper.
• get_usage How many counted calls you have left.
• list_library Your collections, if you allow it.

Free

10 recommendations a week

Individual

200 recommendations a day

Searching and paper details never count toward the allowance.

Data

Built on open scholarly data

• OpenAlex

  An open catalog of scholarly works, authors, institutions and topics, and the foundation of our search and graphs. openalex.org

• Semantic Scholar

  The Allen Institute for AI's research tool, which adds citations and paper details on top. semanticscholar.org

Runs on Amazon Web Services. Payments by Stripe.

Questions

What types of academic works does Paper Nexus cover?

What is multi-origin search?

What is the citation map?

Why are some papers missing from the map?

Can I export my results?

Can I use Paper Nexus from an AI assistant?

Is Paper Nexus free to use?

Which plan should I choose?

Start with a paper you know

A free account gets you 3 searches a week and your own library.