Crossref MCP Server
by jtl-neoio.github.jtl-neo/crossref-mcpv0.1.0
MCP server wrapping the Crossref REST API for scholarly metadata.
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Install Crossref MCP server
Install in Claude Code
claude mcp add crossref-jtl-neo -e CROSSREF_PLUS_TOKEN='<crossref-plus-token>' -- uvx crossref-mcpInstall in Cursor
{
"mcpServers": {
"crossref-jtl-neo": {
"command": "uvx",
"args": [
"crossref-mcp"
],
"env": {
"CROSSREF_PLUS_TOKEN": "<crossref-plus-token>"
}
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).
Install in Claude Desktop
{
"mcpServers": {
"crossref-jtl-neo": {
"command": "uvx",
"args": [
"crossref-mcp"
],
"env": {
"CROSSREF_PLUS_TOKEN": "<crossref-plus-token>"
}
}
}
}Settings → Developer → Edit Config (claude_desktop_config.json), then restart.
Install in VS Code
{
"servers": {
"crossref-jtl-neo": {
"type": "stdio",
"command": "uvx",
"args": [
"crossref-mcp"
],
"env": {
"CROSSREF_PLUS_TOKEN": "<crossref-plus-token>"
}
}
}
}Add to .vscode/mcp.json in your workspace.
Install in Windsurf
{
"mcpServers": {
"crossref-jtl-neo": {
"command": "uvx",
"args": [
"crossref-mcp"
],
"env": {
"CROSSREF_PLUS_TOKEN": "<crossref-plus-token>"
}
}
}
}Add to ~/.codeium/windsurf/mcp_config.json.
Configuration
| Variable | Required | Secret | Description |
|---|---|---|---|
| CROSSREF_MAILTO | — | — | Email for Crossref's polite pool (recommended). |
| CROSSREF_PLUS_TOKEN | — | yes | Optional Crossref Plus API token. |
| MCP_API_KEY | — | yes | Optional X-API-Key for HTTP transport. |
Freshness
Slowing — last maintenance signal 4mo ago. The newest of the signals below sets the band.
Last commit (default branch)
2026-06-08 · 4mo ago · GitHub
Latest release
2026-06-03 · 4mo ago · GitHub · v0.1.0
Package published
no data · npm/PyPI
Registry entry updated
2026-06-03 · 4mo ago · official registry · v0.1.0
FAQ
›How do I install the Crossref MCP server in Claude Code?
Run: claude mcp add crossref-jtl-neo -e CROSSREF_PLUS_TOKEN='<crossref-plus-token>' -- uvx crossref-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.
›Does Crossref require an API key?
Yes. It expects CROSSREF_PLUS_TOKEN, MCP_API_KEY, of which 2 are secrets.
›Can I use Crossref as a remote (hosted) MCP server?
No hosted endpoint is published; it runs locally over stdio.
›Is Crossref in the official MCP registry?
Yes, as io.github.jtl-neo/crossref-mcp.