• STATUS
  • LINK
  • SEARCH
  • HUMAN

How to check DOI paywall status with your AI

Connect Unpaywall to your AI client once. After that, you can just drop a DOI into your chat to see if you can read the paper for free.

Ask AI about this page

Short answer

Can my AI tell me if a paper is behind a paywall?

Yes. Your AI uses the get_article_oa_status tool to check a DOI against open access databases. It will tell you immediately if a legal, free version of the paper exists.

The outcomes

What you get from a DOI check

The AI handles the database lookup so you don't have to hunt for PDFs manually.

STATUS

Access confirmation

The AI uses the tool to find the paper's status. You get a clear answer on whether it is open access or paywalled.

LINK

Direct PDF access

If an open access version is found, the AI provides the direct link. You can click it to read the full text immediately.

SEARCH

DOI verification

The AI validates the DOI you provide. It ensures the identifier is correct before querying the database.

HUMAN

Manual fallback

If no open access version is found, you decide how to proceed. You might need to use a library login or request the paper from the author.

The workflow

What your AI does when a DOI arrives.

The AI acts as a bridge between your chat and the Unpaywall database.

  1. Identify DOI

    The AI extracts the DOI from your message or the text you've highlighted.

    get_article_oa_status

  2. Query database

    The AI sends the DOI to Unpaywall to check for legal, free versions.

    get_article_oa_status

  3. Retrieve link

    The AI pulls the specific URL for the open access PDF or landing page.

    get_article_oa_status

  4. Report status

    The AI tells you if the paper is free to read or if it's behind a paywall.

    get_article_oa_status

Try it

Copy these to start.

Use these prompts to trigger the check.

Starting points

Replace the bracketed DOI with the actual identifier you want to check.

Unpaywall Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_FhVinYZ5ipCUoRhSWZX441L0cACxRSjvwvPVvMMz/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — Unpaywall capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "unpaywall-open-access-papers-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_FhVinYZ5ipCUoRhSWZX441L0cACxRSjvwvPVvMMz/mcp"
    }
  }
}
Copy into chat04

  • Check if this paper is open access: 10.1038/s41586-020-2012-7

  • Is there a free version of this DOI available? 10.1126/science.abb7015

  • Find the open access link for DOI 10.1016/j.cell.2021.01.001

  • Use Unpaywall to see if I can read this paper for free: 10.1146/annurev.cell.10.090703.130111

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Start here

Connect Unpaywall once, then ask.

Connect the MCP to your client in one click. Your credentials stay encrypted, and you can start checking DOIs immediately.

Connect Unpaywall to your AI

FAQ

How the task behaves

  • 01

    Can the AI download the PDF for me?

    No. The AI can find the link to the PDF, but you have to click it and download it yourself.

  • 02

    Does it work with any DOI?

    Yes, as long as the DOI is valid and exists in the Unpaywall database.

  • 03

    Can the AI bypass a paywall using a library login?

    No. The tool only finds legal, open access versions. It cannot log in to your university or institutional account.

  • 04

    Can the AI change the status of a paper?

    No. The AI only reads the status from the database; it cannot modify any records.

  • 05

    What if the paper is behind a paywall?

    The AI will tell you that no open access version was found.

  • More questions about Unpaywall? The Connector page answers them. See everything the Unpaywall Connector can do

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