Unpaywall MCP Server

by ElliotPadfield

TypeScript

MIT License

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unpaywall_fetch_pdf_text

Extract text content from open access research papers using DOI or PDF URL to enable analysis of academic literature.

Instructions

Download and extract text from best OA PDF for a DOI, or from a provided PDF URL.

Input Schema

Name	Required	Description
`doi`	No	DOI string or DOI URL. Used if pdf_url is not provided.
`email`	No	Email to identify requests to Unpaywall (required when resolving via DOI).
`pdf_url`	No	Direct PDF URL to download and parse (takes precedence over DOI).
`truncate_chars`	No	Max characters of extracted text to return (default 20000).

Input Schema (JSON Schema)

{
  "additionalProperties": false,
  "properties": {
    "doi": {
      "description": "DOI string or DOI URL. Used if pdf_url is not provided.",
      "type": "string"
    },
    "email": {
      "description": "Email to identify requests to Unpaywall (required when resolving via DOI).",
      "type": "string"
    },
    "pdf_url": {
      "description": "Direct PDF URL to download and parse (takes precedence over DOI).",
      "type": "string"
    },
    "truncate_chars": {
      "description": "Max characters of extracted text to return (default 20000).",
      "minimum": 1000,
      "type": "integer"
    }
  },
  "required": [],
  "type": "object"
}

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