How to Use the CrossRef MCP in Claude Code

Q: What is the command to add the CrossRef MCP Server to Claude Code?

Run claude mcp add --transport http crossref-mcp -- . Make sure all flags come before the server name.

Pipe 140 million academic papers directly into your terminal with Claude Code.

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Connect CrossRef MCP to Claude Code

Create your Vinkius account to connect CrossRef to Claude Code and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup CrossRef with Claude Code

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Script academic searches from the CLI

Terminal users don't want to open a browser to check a citation. You just run a command, and your agent hits the `search_crossref` tool to pull exact bibliographic data straight into standard output. This means you can pipe search results into other shell scripts. Ask your headless client to find papers on distributed systems and write the citation counts to a local CSV file.

Batch resolve DOIs via the CrossRef MCP Server

Validating hundreds of academic links in a CI/CD pipeline is trivial now. You point your agent at a directory of markdown files and tell it to check every DOI. It uses the `get_crossref_doi` tool to verify the metadata for 10.1038/nature12373 and others. If a DOI throws an error or the journal name mismatches, the script catches it before you merge the pull request.

Extract author metrics programmatically

Building a database of researchers requires accurate citation data. Your CLI agent can iterate through a list of names and execute the `search_crossref_author` tool via the MCP Server for each one. The terminal output gives you their publications sorted by relevance. You can have the agent parse those JSON responses and insert the metrics directly into your Postgres database.

Setup guide

Set up CrossRef MCP in Claude Code

Prerequisites

Claude Code CLI installed (npm install -g @anthropic-ai/claude-code)
Active Vinkius subscription with a valid endpoint token

1

Run the add command

Open your terminal and run the command shown on the right. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com. Use --scope user to make it available across all projects.
2

Verify the connection

Start a Claude Code session and type /mcp to list connected servers. You should see crossref-mcp with a green status indicator.
3

Start using tools

Ask Claude Code something like "Check my latest CrossRef transactions." It will automatically discover and invoke the available CrossRef tools.

Terminal

claude mcp add --transport http crossref-mcp https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

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Prerequisites

Claude Code CLI installed
Active Vinkius subscription with a valid endpoint token

1

Open the config file

Create or edit .mcp.json in your project root for project-level scope, or ~/.claude.json for user-level scope.
2

Add the CrossRef MCP

Paste the JSON snippet shown on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Restart Claude Code

Start a new Claude Code session. Type /mcp to confirm the server is connected. The tools will be automatically available in your conversation.

.mcp.json

{
  "mcpServers": {
    "crossref-mcp": {
      "type": "url",
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by CrossRef. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about CrossRef MCP in Claude Code

Run `claude mcp add --transport http crossref-mcp -- `. Make sure all flags come before the server name.

Yes. Since the client runs headless, you can trigger DOI validation scripts during your CI/CD process. It will fail the build if someone commits an invalid academic reference.

The agent executes the search and returns the bibliographic metadata directly to your terminal. You can then pipe that text into `jq`, grep it, or have the agent format it into a report.

No. The registry provides complete metadata, citation counts, and abstracts when available. It does not host the actual PDF files for the scholarly works.

Your terminal executes these commands through an isolated V8 sandbox on Vinkius. Once the citation data or author metrics return to your CLI, the temporary server instance is destroyed, leaving no trace of your activity.

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