MCP server

Unpaywall

io.github.pipeworx-io/unpaywall

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Unpaywall MCP — open-access lookup for scholarly papers (free, no key)

Website Source

At a glance

Type

MCP server

Publisher

pipeworx.io (verified by the MCP Registry)

Status

Working at last check

Tools

43

Token cost

About 26,438 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http unpaywall https://gateway.pipeworx.io/unpaywall/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.unpaywall]
url = "https://gateway.pipeworx.io/unpaywall/mcp"

Gemini CLI

{"mcpServers":{"unpaywall":{"httpUrl":"https://gateway.pipeworx.io/unpaywall/mcp"}}}

Cursor

{"mcpServers":{"unpaywall":{"url":"https://gateway.pipeworx.io/unpaywall/mcp"}}}

VS Code

{"servers":{"unpaywall":{"type":"http","url":"https://gateway.pipeworx.io/unpaywall/mcp"}}}

Antigravity

agy mcp add unpaywall https://gateway.pipeworx.io/unpaywall/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"unpaywall","server_url":"https://gateway.pipeworx.io/unpaywall/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"unpaywall","server_url":"https://gateway.pipeworx.io/unpaywall/mcp"}

Tools

• get_oa ~135 tokens
  Given a DOI, fetch open-access status and the best free legal copy if one exists. Returns is_oa, oa_status (gold | green | hybrid | bronze | closed), best location (URL, host type, license), and journal metadata.

Browse

• GitHub tools
• Legal research
• GitHub and code hosting

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