Crossref MCP Server

by jtl-neo Your server? Claim it

local only

Crossref MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 75 installs a week from pypi. Last commit 8 Jun 2026.

MCP server wrapping the Crossref REST API for scholarly metadata.

Installs per day peak 22 · avg 11 · -5% w/w

a month agotoday

Installs / week

pypi · crossref-mcp

Stars

0 open issues

8 Jun 2026

Last commit

0 releases in 90 days

MIT

License

Python

Nothing serious here today

Today is the operative word: we check Crossref MCP 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

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add crossref-mcp -- uvx crossref-mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "crossref-mcp": {
      "args": [
        "crossref-mcp"
      ],
      "command": "uvx"
    }
  }
}

~/.codex/config.toml

[mcp_servers.crossref-mcp]
command = "uvx"
args = ["crossref-mcp"]

.cursor/mcp.json

{
  "mcpServers": {
    "crossref-mcp": {
      "args": [
        "crossref-mcp"
      ],
      "command": "uvx"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "crossref-mcp": {
      "args": [
        "crossref-mcp"
      ],
      "command": "uvx"
    }
  }
}

This one needs environment variables set before it will start: CROSSREF_MAILTO (Email for Crossref's polite pool (recommended).), CROSSREF_PLUS_TOKEN (Optional Crossref Plus API token.). The author declared them in the registry entry; get the values from the project itself.

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Crossref MCP — questions

Answers built from our own checks of this server.

Why is there no uptime for Crossref MCP?

Crossref MCP runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the pypi package crossref-mcp was installed 75 times last week.

How do I connect Crossref MCP?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls crossref-mcp straight from pypi; nothing to host, nothing to sign up for.

How many people use Crossref MCP?

The pypi package crossref-mcp was installed 75 times in the last week. Week over week that is -5%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is Crossref MCP open source?

Yes — it is published under the MIT licence, written in Python and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.