Context7
Feeds AI the latest docs for libraries and frameworks before it answers, so code it writes does not use outdated, removed functions.
Computer or cloud
Paper Nexus
Overview
Description from the maker (original English)
Find related scientific papers through their citation network, from OpenAlex and Semantic Scholar.
PopNx MCP’s three pillars
These three are never merged into one score: opinions, measurements and popularity are different things.
- User voiceiNo reviews yetReviews open together with accounts in a later step
- Our basic checksi2 of 3 passedChecked from public information; code not scanned yet
- UsageiVery new★ –
What you can do with it
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
- Connection: Runs in the cloud
- Transport: Streamable HTTP
- Category: Search & AI memory
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 2 of 3 passed
- Runs on the maker’s server: what you ask it goes through their server.
- The registry lists no key to fill in.
You need
- Runs in the cloudNothing to install; it connects over the internet
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Works in Claude on the web, desktop and mobile:
- Open Settings → Connectors
- Press Add custom connector
- Paste the address below and press Add
- If it asks you to sign in, sign in with the maker
https://papernex.us/mcpRun this in your terminal
claude mcp add --transport http papernexus https://papernex.us/mcpOr copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"papernexus": {
"url": "https://papernex.us/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Or copy the settings yourself
Paste into .vscode/mcp.json in your project
{
"servers": {
"papernexus": {
"type": "http",
"url": "https://papernex.us/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
ChatGPT connects only to servers on the internet:
- Open ChatGPT on the web → Settings → Connectors (Apps)
- Press Create or Add (some plans need Developer mode under Advanced first)
- Paste the address below, give it a name and save
- If it asks you to sign in, sign in with the maker
https://papernex.us/mcpMenu names can differ slightly by plan and over time.
Your choice stays on this device in a cookie; no account needed.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
What it can do
The server asks you to sign in before it lists its tools.
Basic checksi
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 8, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified against the domain papernex.us (the registry checks domain ownership)
- … Not checked yet
Still maintained
We have not read this repo from GitHub yet
- … Not checked yet
Has a licence
We have not read this repo from GitHub yet
- ✓ Pass
Endpoint responds
Responded in 279 ms (HTTP 401)
- ! Caution
Sign-in with OAuth
Needs a key or token that you copy and paste yourself
- … Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint
Compared with others in Search & AI memoryi
- More stars than 0% of the other 5716 servers in this category
- Published to the registry more recently than 80% of the other 5716 servers in this category
- Basic checks equal to or better than 39% of the other 5716 servers in this category
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
Common questions
Is Paper Nexus safe?
It passed 2 of 3 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
What keys or codes does it need?
The registry does not list a required key, though some servers ask you to sign in on first use.
Does it run on my computer or in the cloud?
It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.
Is it still maintained?
The GitHub repo last changed –, and the latest version (1.0.0) reached the registry 9 days ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.
What can I use instead?
In the same category: Context7, Codebase Memory, Exa
Alternatives
Servers in the same category from other makers, sorted by stars.
Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
Codebase Memory
Codebase knowledge graph for AI agents — 162 languages, sub-ms queries, 99% fewer tokens.
Runs on your computer
Exa
Connect AI agents to Exa for web search, content fetching, and multi-step research.
Runs in the cloud✓ exa.ai
README from the maker
Open the README
Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
Paper Nexus for AI assistants
Find related scientific papers through their citation network, from Claude, ChatGPT, Cursor, VS Code or any MCP client.
Paper Nexus maps the scientific literature by its citations, using the scholarly works in OpenAlex and Semantic Scholar. This repository holds its MCP server's public definition: the connection details, a Claude Code plugin, a Gemini CLI extension, the MCP Registry entry, and the tool reference. The server itself is hosted; there is nothing to install or run.
https://papernex.us/mcpAsk your assistant things like:
- "Find papers related to *Attention Is All You Need* and *BERT* together."
- "What are the main references of the AlphaFold 2 paper, and what else should I read around it?"
- "Starting from https://arxiv.org/abs/1512.03385, which papers on residual networks should I read?"
- "Go through my *Thesis / Methods* collection and suggest papers I haven't saved."
Every paper it returns links to papernex.us, and each set of recommendations comes with a link that opens the whole citation graph in Paper Nexus.
Connect
You sign in with a Paper Nexus account the first time you connect; a free account works. There are no API keys: the server uses OAuth, so your assistant opens a Paper Nexus page where you sign in and allow access.
Claude (claude.ai and Claude Desktop)
Settings → Connectors → Add custom connector. Name it Paper Nexus, give the URL https://papernex.us/mcp, then Connect and sign in.
Claude Code
claude mcp add --transport http papernexus https://papernex.us/mcpOr install the plugin, which adds a skill that teaches Claude a literature-search workflow with these tools:
claude plugin marketplace add PaperNexus/papernexus-mcpclaude plugin install papernexus@papernexus
Then run /mcp, choose papernexus, and sign in.
ChatGPT
Turn on developer mode (Settings → Apps → Advanced settings), then create an app with the URL https://papernex.us/mcp and OAuth authentication, and sign in.
Cursor
Install in Cursor, or add it to ~/.cursor/mcp.json:
{"mcpServers": { "papernexus": { "url": "https://papernex.us/mcp" } } }
VS Code
Install in VS Code, or add it to .vscode/mcp.json:
{"servers": { "papernexus": { "type": "http", "url": "https://papernex.us/mcp" } } }
Gemini CLI
gemini extensions install https://github.com/PaperNexus/papernexus-mcpOther clients
Any client that speaks MCP over Streamable HTTP with OAuth can connect to https://papernex.us/mcp. The server supports Client ID Metadata Documents and dynamic client registration, and every protocol revision from 2025-03-26 on.
Tools
| Tool | What it does |
|---|---|
search_papers | Find a paper by its title, a DOI or a link, and get its Paper Nexus id |
recommend_papers | Papers related to one or more papers through their citation network |
get_paper | One paper's details and its most-cited references |
get_usage | How many counted calls your account has left |
list_library | Your Paper Nexus library, if you allow "Read your library" when connecting |
list_citing_papers | The papers citing one paper |
recommend_papers and list_citing_papers also take filters (years, citation counts, authors, venues, title words, citing or cited papers, open access, document types) on every account. Each recommendation says which origin papers it is linked to and how, so your assistant can tell you why a paper is there. Every tool that lists papers takes fields, to return only the details you need, such as titles and years. Arguments and results are in the tool reference. Every tool is read-only.
Allowance
recommend_papers and list_citing_papers count against your allowance. The other tools share a larger daily limit of lookups, and every tool a limit of 30 calls a minute. get_usage tells your assistant how many calls are left.
| Plan | Counted calls | Lookups | Origin papers per recommendation |
|---|---|---|---|
| Free | 10 a week | 100 a day | up to 2 |
| Premium | 200 a day | 1,000 a day | up to 10 |
A filtered call is counted like any other. A recommendation or citing list that fails or finds nothing isn't counted. See pricing for Premium.
Privacy and access
- Connecting asks for your permission on a Paper Nexus page that names the app and where it will send you back. Library access is asked for separately and is read-only.
- Paper Nexus never sees your conversation, only the tool calls your assistant makes. Recommendation requests are saved to your Paper Nexus history, as on the site.
- You can see and revoke connected apps in Paper Nexus under Account settings → AI assistants.
Support
Open an issue or email info@papernex.us.
License
The files in this repository are MIT licensed; see LICENSE. The Paper Nexus service and its data are covered by its terms.