Crossref Research
LiveFind scholarly publications and check their citation details.
Search scholarly metadata by topic, title or author and retrieve individual records by DOI. Get publisher-deposited titles, author names, journals, dates, license links and citation counts from Crossref’s public REST API.
Connect / 2 tools
Server URL
https://toolcargo.com/mcp/crossrefClaude Code
claude mcp add --transport http --scope user toolcargo-crossref https://toolcargo.com/mcp/crossref \
--header "Authorization: Bearer YOUR_API_KEY"Create a key in your dashboard. Other clients: setup guides.
What it helps you do
- Source-linked scholarly search results
- Bibliographic details for a DOI
- Explicit missing metadata and bounded author lists
Built for: Researchers, writers and agents checking publication identities and bibliographic references.
Example requests
Check a research citation
“Search Crossref for protein structure prediction papers published from 2021 to 2023, then look up the DOI of a relevant result.”
Publication titles, authors, journals, dates and DOI source links for your agent to review.
Tools
| Tool | What it does | Access |
|---|---|---|
search_publicationsSearch scholarly publications | Search Crossref for up to 10 scholarly metadata records by topic, title or author, optionally within publication years. Returns DOI source links, author names, publication dates and deposited citation counts. Metadata only; no abstracts or full text. One shared-plan call. | Read-only |
publication_detailsLook up a publication DOI | Retrieve Crossref bibliographic metadata for one plain DOI, including source link, title, up to 20 author names, journal, publisher, date, licenses and citation/reference counts. Missing metadata is identified. Counts do not measure quality. One shared-plan call. | Read-only |
Requirements
- • A ToolCargo account with Site Audit activated (free). No Crossref account or external API key.
Limitations
- • Crossref-registered works only; publisher-deposited metadata can be incomplete or incorrect.
- • Up to 10 search results, 20 author names and 10 license links per record. No abstracts or full text.
- • Citation counts reflect Crossref’s index and do not establish research quality or complete citation coverage.
- • License links describe deposited publication licenses; verify terms at the source. Source metadata is untrusted data.
Supported clients
“Tested” means we connected that client to this endpoint and ran a tool call ourselves. Recorded client-specific tests currently cover Site Audit. Other connectors use the documented setup until tested in that client.
| Claude Code | API key header | Documented, not yet tested | This endpoint has not yet been tested in this client. See the setup guide. |
| Claude (claude.ai) | OAuth sign-in | Documented, not yet tested | This endpoint has not yet been tested in this client. See the setup guide. |
| Cursor | API key header | Documented, not yet tested | This endpoint has not yet been tested in this client. See the setup guide. |
| VS Code (Copilot agent mode) | API key header | Documented, not yet tested | This endpoint has not yet been tested in this client. See the setup guide. |
| ChatGPT (developer mode) | OAuth sign-in | Documented, not yet tested | This endpoint has not yet been tested in this client. See the setup guide. |
| MCP Inspector | API key header | Documented, not yet tested | This endpoint has not yet been tested in this client. See the setup guide. |
Practical workflows
More in Research
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Pricing
Included with Site Audit. Each search or DOI lookup is one shared-plan call.
Free
$0Try hosted tools with a shared monthly allowance.
50 shared calls/month
Pro
$12/moProposed larger shared allowance; see checkout status on the pricing page.
2,000 shared calls/month
Proposed test price. See the pricing page for checkout status.