When to Use

Use this tool when you need to get a specific paper from crossref by its doi.

args:
    doi: digital object identifier (e.g., '10.1038/nature12373').
returns:
    paper metadata in dictionary format, or empty dict if not found.
    
example:
    get_crossref_paper_by_doi("10.1038/nature12373")
. This is part of the Paper Search provider on xpay✦.

MCP Connection

Connect to xpay✦ to access this tool (and 24+ others):

{
  "mcpServers": {
    "xpay": {
      "url": "https://mcp.xpay.sh/mcp?key=YOUR_API_KEY"
    }
  }
}

For Claude Code:

claude mcp add --transport http xpay "https://mcp.xpay.sh/mcp?key=YOUR_API_KEY"

How to Execute

Use the xpay✦ meta-tools to run this tool:

1. xpay_details — Get full input schema: xpay_details("paper-search/get_crossref_paper_by_doi")
2. xpay_run — Execute: xpay_run("paper-search/get_crossref_paper_by_doi", { ...inputs })

Input Parameters

Pricing

• Cost: $0.01/call
• Balance check: Use xpay_balance to check remaining credits
• Get your API key at xpay.tools — $5 free credits included

Related Skills

• Paper Search (all tools) — 25 tools
• Search — $0.01/call
• Fetch — $0.01/call
• Search Arxiv — $0.01/call
• Search Pubmed — $0.01/call
• Search Biorxiv — $0.01/call

Links

• Tool page: https://xpay.tools/paper-search/get-crossref-paper-by-doi/
• Provider: https://xpay.tools/paper-search/
• All tools: https://xpay.tools/explore