Crossref API MCP Server: Install & Setup

Install Crossref API in Claude Code

PyPI (uv)

Claude Code

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

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

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

Docker

Claude Code

claude mcp add crossref-api -- docker run -i --rm docker.io/heyinnaneo/crossref-mcp:0.1.0

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "crossref-api": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "docker.io/heyinnaneo/crossref-mcp:0.1.0"
      ]
    }
  }
}

Frequently asked questions

What does the Crossref API MCP server do?

MCP server wrapping the Crossref REST API for scholarly metadata.

Is the Crossref API MCP server free?

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Does Crossref API run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add Crossref API to Claude Code?

Run: claude mcp add crossref-api -- uvx crossref-mcp

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