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CrossRef

Query CrossRef metadata for scholarly works.

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About

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CrossRef is a Model Context Protocol server in the Search & Web category. It lets AI assistants that speak MCP call its tools and read its resources over STDIO.

Example tools

Illustrative tool names — the actual tool set is defined by the server at runtime.

web_search
Search the web and return top results
fetch_url
Fetch and return the contents of a URL

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Frequently Asked Questions

Common questions about CrossRef.

What is the CrossRef MCP and what does it do?
The CrossRef MCP allows you to query metadata for scholarly works. It provides a standardized way to access information about publications, such as DOIs, authors, and titles.
How can I install the CrossRef MCP in a client like Claude Desktop or Cursor?
Installation typically involves adding the CrossRef MCP's repository URL to your client's MCP configuration. You would then enable or activate it through the client's interface to begin using its functionalities.
Does the CrossRef MCP require an API key or other credentials for access?
No, the CrossRef MCP does not require an API key or any other authentication credentials. It is designed for public access to CrossRef metadata.
What are the key capabilities exposed by the CrossRef MCP?
The CrossRef MCP primarily exposes tools for searching and retrieving metadata related to scholarly articles and other research outputs. It focuses on facilitating access to DOIs and associated publication details.
Is there a cost associated with using the CrossRef MCP?
The CrossRef MCP itself is open-source and free to use. Any potential costs would be associated with the underlying CrossRef service or your client application, if applicable.
What is a limitation or prerequisite for using the CrossRef MCP?
A key prerequisite for the CrossRef MCP is a stable internet connection to access the CrossRef API. Without connectivity, the MCP cannot retrieve the necessary metadata for scholarly works.

Install CrossRef

Claude Desktop

Add this to claude_desktop_config.json.

{
  "mcpServers": {
    "crossref": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-crossref"
      ]
    }
  }
}

Cursor

Add this to ~/.cursor/mcp.json.

{
  "mcpServers": {
    "crossref": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-crossref"
      ]
    }
  }
}

VS Code

Add this to your workspace settings.json.

{
  "mcp.servers": {
    "crossref": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-crossref"
      ]
    }
  }
}

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