Crossref

io.github.SMABoundless/crossref · v1.0.0

Search and retrieve scholarly metadata from the Crossref REST API

Source code Set it up

Connect Runs on your machine

Terminal

claude mcp add crossref -e CROSSREF_MAILTO=<CROSSREF_MAILTO> -- uvx crossref-mcp-server==1.0.0

claude_desktop_config.json

{
  "mcpServers": {
    "crossref": {
      "command": "uvx",
      "args": [
        "crossref-mcp-server==1.0.0"
      ],
      "env": {
        "CROSSREF_MAILTO": "<CROSSREF_MAILTO>"
      }
    }
  }
}

~/.cursor/mcp.json

{
  "mcpServers": {
    "crossref": {
      "command": "uvx",
      "args": [
        "crossref-mcp-server==1.0.0"
      ],
      "env": {
        "CROSSREF_MAILTO": "<CROSSREF_MAILTO>"
      }
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "crossref": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "crossref-mcp-server==1.0.0"
      ],
      "env": {
        "CROSSREF_MAILTO": "<CROSSREF_MAILTO>"
      }
    }
  }
}

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server runs locally, so its tools are listed by your MCP client once it starts.

Environment variables

Name	Description
`CROSSREF_MAILTO` Optional	Your email for Crossref polite pool (better rate limits, no key needed)

Details

Package	`[email protected]` (PYPI, stdio)
First published	4 Jul 2026
Last updated	4 Jul 2026
Registry name	`io.github.SMABoundless/crossref`

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Live status

Local install

Installed and run on your own machine, so there is no public endpoint to check.

Pair it with live search

Agents that use Crossref often also need current facts. NestDaddy MCP gives your AI today's internet: web search, real-time breaking news and full page reading in one connector.

See NestDaddy MCP

For maintainers

[![NestDaddy MCP](https://nestdaddy.com/mcp/servers/io-github-smaboundless-crossref/badge.svg)](https://nestdaddy.com/mcp/servers/io-github-smaboundless-crossref)

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