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dam2452

crossref-mcp

by dam2452
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Python
Remote

crossref-mcp

Polski

Crossref REST API MCP server. Wraps the public Crossref REST API (works, journals, funders, members, types, licenses) — no API key required.

Table of contents

Related MCP server: paper-search-mcp

Tools

Tool

Parameters

Description

search_works

query, filter, select, sort, order, rows=20, offset=0, cursor

Search Crossref works (publications)

get_work

doi: str

Full metadata for a single work by DOI

get_work_agency

doi: str

Registration agency for a DOI

list_journals

query, rows=20, offset=0, cursor

List or search journals

get_journal

issn: str

Journal metadata by ISSN

get_journal_works

issn, query, filter, rows=20, offset=0, cursor

Works published in a journal

list_funders

query, filter, rows=20, offset=0

List or search funding bodies

get_funder

funder_id: str

Funder metadata by Funder Registry ID

list_members

query, filter, rows=20, offset=0

List or search Crossref members (publishers)

list_types_and_licenses

none

Available work types and licenses

Environment variables

Variable

Required

Description

CROSSREF_MCP_MAILTO

no

Email address for Crossref's "polite pool" — higher rate limits, faster responses

Wiring it up

Only requirement: uv (https://docs.astral.sh/uv/). Nothing else to install.

Claude Code

claude mcp add crossref-mcp -- uvx --from git+https://github.com/dam2452/crossref-mcp.git crossref-mcp

With the polite pool email set:

claude mcp add crossref-mcp -e CROSSREF_MCP_MAILTO=you@example.com -- uvx --from git+https://github.com/dam2452/crossref-mcp.git crossref-mcp

Claude Desktop / other MCP client

{
  "mcpServers": {
    "crossref-mcp": {
      "command": "uvx",
      "args": ["--from", "git+https://github.com/dam2452/crossref-mcp.git", "crossref-mcp"],
      "env": { "CROSSREF_MCP_MAILTO": "you@example.com" }
    }
  }
}

After pushing a new version: uv cache clean and restart the client.

Local run

uv run --directory . crossref-mcp

Tests (manual):

uv run --directory . --with pytest pytest test/
Install Server
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Maintenance

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