Paper Search MCP

Instructions

Implementation Reference

• paper_search_mcp/server.py:711-725 (handler)

  The handler function `download_crossref` which acts as the entry point for the tool. It calls the `download_pdf` method of the `crossref_searcher` instance.

  async def download_crossref(paper_id: str, save_path: str = "./downloads") -> str:
      """Attempt to download PDF of a CrossRef paper.
  
      Args:
          paper_id: CrossRef DOI (e.g., '10.1038/nature12373').
          save_path: Directory to save the PDF (default: './downloads').
      Returns:
          str: Message indicating that direct PDF download is not supported.
          
      Note:
          CrossRef is a citation database and doesn't provide direct PDF downloads.
          Use the DOI to access the paper through the publisher's website.
      """
      try:
          return crossref_searcher.download_pdf(paper_id, save_path)

• paper_search_mcp/academic_platforms/crossref.py:233-248 (handler)

  The actual implementation of `download_pdf` inside the `CrossRefSearcher` class. It returns a message explaining that CrossRef does not provide direct PDF downloads.

  def download_pdf(self, paper_id: str, save_path: str) -> str:
      """
      CrossRef doesn't provide direct PDF downloads.
      
      Args:
          paper_id: DOI of the paper
          save_path: Directory to save the PDF
          
      Raises:
          NotImplementedError: Always raises this error as CrossRef doesn't provide direct PDF access
      """
      message = ("CrossRef does not provide direct PDF downloads. "
                "CrossRef is a citation database that provides metadata about academic papers. "
                "To access the full text, please use the paper's DOI or URL to visit the publisher's website.")
      raise NotImplementedError(message)