Paper Nexus MCP Server

by papernex Your server? Claim it

answering

Paper Nexus is answering right now. Last checked 3 min ago. Last commit 1 Nov 2026.

Find related scientific papers through their citation network, from OpenAlex and Semantic Scholar.

Uptime history 70 hours of history

70 hours agonow

100.0%

Uptime 24h

91 of 91 checks

—

Tools

hidden behind auth

1032 ms

Response time

average over 24h

Stars

last commit 1 Nov 2026

Nothing serious here today

Today is the operative word: we check Paper Nexus every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 3 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add papernexus --transport http https://papernex.us/mcp

Settings → Connectors → Add custom connector, then paste this address

https://papernex.us/mcp

~/.codex/config.toml

[mcp_servers.papernexus]
url = "https://papernex.us/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "papernexus": {
      "url": "https://papernex.us/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "papernexus": {
      "type": "http",
      "url": "https://papernex.us/mcp"
    }
  }
}

This endpoint answered with an authorization challenge. The server is running, but it did not say what kind of credentials it expects.

Endpoints

URL	Transport	State	Latency	Checked
https://papernex.us/mcp	streamable-http	needs auth	231 ms	3 min ago

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Paper Nexus — questions

Answers built from our own checks of this server.

Why is there no tool list for Paper Nexus?

The server answered our handshake with an authorization challenge, so it is running — but it will not describe its tools to an anonymous client. To see them you need to connect with your own credentials. We record it as alive, not as broken: 100.0% of checks in the last 24 hours got a reply.

Is Paper Nexus working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 1032 ms. The bar chart above shows every period we have measured.

How do I connect Paper Nexus?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address. You will need your own credentials: it refuses anonymous clients.

Does Paper Nexus need an API key?

Yes. Every time we knock, Paper Nexus answers with an authorization challenge instead of its tool list — that is how we know it is running and gated rather than broken. Bring your own credentials and it will talk.

How fast is Paper Nexus?

It answers our handshake in 1032 ms on average, which is faster than 6% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Paper Nexus open source?

The code is open source: it is published under the MIT licence and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at papernex.us, which runs on its operator's own terms.