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Use CrossRef with your AI.

Connect your account once and let the AI you already use work with it, without building another integration. Query scholarly metadata for millions of academic publications with DOI resolution, citation tracking, and publisher data.

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Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

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Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.

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Complete set · 16 capabilities

The complete CrossRef capability set.

These are the exact actions your AI can choose when you ask it to work with CrossRef.

Capability set01 / 04

01-04

4 capabilities in this set.

Part of 16 available through CrossRef.

  1. 01

    Get journal

    Returns title, publisher, subjects, total DOI count, current and backfile counts, metadata coverage percentages, and quality flags. Get journal details by ISSN

  2. 02

    Get publisher

    Returns name, DOI prefix, total/current/backfile DOI counts, metadata coverage scores, and quality flags. Get publisher details with output metrics

  3. 03

    Get citations count

    The "is-referenced-by-count" is the number of times other works cite this DOI. The "references-count" is how many references this work cites. Quick way to assess a paper's impact. Get citation count for a DOI

  4. 04

    Get funder works

    Use the funder ID from search_funders (e.g. "100000002" for NIH). Essential for understanding research funding landscapes and tracking funded output. Get works funded by a specific funding organization

Capability set02 / 04

05-08

4 capabilities in this set.

Part of 16 available through CrossRef.

  1. 05

    Get journal works

    Can be filtered with an optional text query. Useful for browsing a journal's publication history or searching within a specific journal. Get articles published in a specific journal

  2. 06

    Search by affiliation

    Use institution names like "Stanford University", "MIT", "Harvard Medical School". Can be combined with a topic query. Search works by institutional affiliation

  3. 07

    Search by orcid

    ORCID is the universal researcher identifier. Format: "0000-0002-1825-0097". Essential for finding the complete publication record of a researcher across all journals and publishers. Find works by ORCID author identifier

  4. 08

    Search funders

    Examples: "National Institutes of Health", "National Science Foundation", "European Research Council", "Wellcome Trust". Search funding organizations worldwide

Capability set03 / 04

09-12

4 capabilities in this set.

Part of 16 available through CrossRef.

  1. 09

    Search journals

    Returns journal titles, ISSNs, publishers, subject areas, total DOI counts, and metadata coverage scores. Use this to find journal identifiers and evaluate journal metrics. Search academic journals by title or ISSN

  2. 10

    Search preprints

    This covers preprints from bioRxiv, medRxiv, SSRN, ChemRxiv, and other preprint servers that register DOIs with CrossRef. Search registered preprints across all servers

  3. 11

    Search recent works

    Default is last 7 days. Use this to monitor the latest publications across all journals and publishers. Find the most recently registered DOIs

  4. 12

    Validate doi

    Returns whether the DOI exists in CrossRef, along with basic metadata (title, type, publisher) if valid. Useful for quality-checking reference lists and citation data. Check if a DOI is valid and registered

Capability set04 / 04

13-16

4 capabilities in this set.

Part of 16 available through CrossRef.

  1. 13

    Get reference list

    Returns all cited references with their DOIs (when available), authors, titles, journals, and years. Essential for bibliography analysis, finding source material, and understanding a paper's intellectual foundations. Get full reference list (bibliography) for a DOI

  2. 14

    Resolve doi

    Returns title, authors, journal, publisher, publication date, volume, issue, pages, citation count, reference count, subject areas, and license information. The definitive capability for getting structured metadata from any DOI. Resolve a DOI to full bibliographic metadata

  3. 15

    Search publishers

    Returns publisher names, DOI prefixes, and total DOI counts. Search academic publishers

  4. 16

    Search works

    Supports full-text query, filters, sorting, and pagination. Filter syntax: "from-pub-date:2024-01-01", "type:journal-article", "has-orcid:true", "has-references:true", "is-update:false". Sort options: "relevance", "published", "indexed", "is-referenced-by-count". Search 150M+ DOI-registered academic works

Observed, not estimated

978ms average. Fast in production.

CrossRef is checked daily against the live service.

Daily averagePeak 1253ms
Aug 20Today
Fastest day
789ms
Slowest day
1253ms
14-day trend
Slowing+11%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 16 capabilities arrive ready to run.

Preview access · not provider authentication

The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of CrossRef, so you can see the experience inside your AI.

It does not authenticate your account with CrossRef. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

CrossRef Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_AljYBYn8CbbL6RdCzlq0XEJ4G5Gemg5NaPOectA4/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — CrossRef capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "stanford-crossref-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_AljYBYn8CbbL6RdCzlq0XEJ4G5Gemg5NaPOectA4/mcp"
    }
  }
}
  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Step-by-step instructions for each client are in the guide. How to connect

FAQ

Questions CrossRef owners ask.

  • 01

    Do I need an API key?

    No. The CrossRef API is fully public. Including a mailto address gets you into the "polite pool" with higher rate limits, which this server handles automatically.

  • 02

    What is a DOI?

    A Digital Object Identifier (DOI) is a unique, permanent identifier assigned to academic publications, datasets, and other research outputs. Format: "10.1038/s41586-021-03819-2". CrossRef is the largest DOI registration agency with over 150 million registered DOIs.

  • 03

    Can I search by ORCID?

    Yes. You can look up all works associated with a researcher's ORCID identifier. ORCID provides a unique, persistent identifier for researchers. similar to what DOI does for publications.

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